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My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
Dear John,
What you have is a relatively simple problem, but one that mechanics will probably never "figure out" until they empty your bank account. While it could be something else check these three things..
1. replace fuel line going into gas tanks--you can feel this but can't see it just about the differential.
2. replace electrical tank switchover. These are usually a big problem as they feel and sound like they are working buy leak and if one tank is empty will suck air and do what you are describing. It's a good idea to keep both tanks with fuel and never empty either.
3. ""After you did that"", take out the plug on the holley primary side fuel bowl and make sure gas is present at idle.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
The pumps in the tank need to be able to put out a volume of gas, the pressure is secondary. The "T" thing in front of the carburator is available with three different hole sizes for the return. I alway replace with the one with the smallest hole. That still keeps the engine from vapor locking and makes it so more of the gas that is being pumped is available for the carburator. THese are available from your local ford dealer. Also, it is possible that there is a small mesh filter in the inlet to the carburator. There is nothing wrong with adding an inline pump along the frame rail. You don't need some big dog/expensive one to help a lot. the carburator can handle about 7 PSI max before it will start to overcome the float.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
The pumps in the tank need to be able to put out a volume of gas, the pressure is secondary. The "T" thing in front of the carburator is available with three different hole sizes for the return. I alway replace with the one with the smallest hole. That still keeps the engine from vapor locking and makes it so more of the gas that is being pumped is available for the carburator. THese are available from your local ford dealer. Also, it is possible that there is a small mesh filter in the inlet to the carburator. There is nothing wrong with adding an inline pump along the frame rail. You don't need some big dog/expensive one to help a lot. the carburator can handle about 7 PSI max before it will start to overcome the float.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
Dear John,
What you have is a relatively simple problem, but one that mechanics will probably never "figure out" until they empty your bank account. While it could be something else check these three things..
1. replace fuel line going into gas tanks--you can feel this but can't see it just about the differential.
2. replace electrical tank switchover. These are usually a big problem as they feel and sound like they are working buy leak and if one tank is empty will suck air and do what you are describing. It's a good idea to keep both tanks with fuel and never empty either.
3. ""After you did that"", take out the plug on the holley primary side fuel bowl and make sure gas is present at idle.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
JOhn
John, does the engine actually quit at 45 MPH and have to be restarted, or does it go "flat" at that speed and just wont go any faster?
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
JOhn
John, does the engine actually quit at 45 MPH and have to be restarted, or does it go "flat" at that speed and just wont go any faster?
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
JOhn
John, does the engine actually quit at 45 MPH and have to be restarted, or does it go "flat" at that speed and just wont go any faster?
it just leans out and quits. If you take you foot off the gas, let it slow down a little, then ease back into the gas it will run, but around 45 or 50 it just sputters out and dies.... just like vapor lock. Feels like it just runs out of gas. Its strange because it can handle high rpm/load under 45 or so but not over. Its like the float bowl emptys out and it just starves....
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
JOhn
John, does the engine actually quit at 45 MPH and have to be restarted, or does it go "flat" at that speed and just wont go any faster?
it just leans out and quits. If you take you foot off the gas, let it slow down a little, then ease back into the gas it will run, but around 45 or 50 it just sputters out and dies.... just like vapor lock. Feels like it just runs out of gas. Its strange because it can handle high rpm/load under 45 or so but not over. Its like the float bowl emptys out and it just starves....
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
JOhn
John, does the engine actually quit at 45 MPH and have to be restarted, or does it go "flat" at that speed and just wont go any faster?
it just leans out and quits. If you take you foot off the gas, let it slow down a little, then ease back into the gas it will run, but around 45 or 50 it just sputters out and dies.... just like vapor lock. Feels like it just runs out of gas. Its strange because it can handle high rpm/load under 45 or so but not over. Its like the float bowl emptys out and it just starves....
JOhn
John,
Sounds like you might have the primary float set to low. I had a similar problem with my 82 460 and solved it by loosening the lock screw on the float adjuster and turning counterclockwise about a 1/4 to 1/2 turn. I would start there and see what happens. Also, if you remove the sight screw from the fuel bowl, fuel should trickle out of the hole. Do this on a level surface.
My 83 ford 460 powered
Conversion van with dual
Gas tanks has been leaning out
To the point of stalling.
I took it to a mechanic (because
I haven't had time to work on it
for a long time) and they tested
the pumps and found them both
to be bad. They were only putting
out a max of ~5 psi. They wanted
a little over $300 to replace the front
fuel pump and over $400 for the rear
fuel pump because they were going
to have to cut the trailer hitch off to
pull the rear tank off the van. So I
told them to replace the Fuel return
valve in front of the carb and replace
the filter in the carb and I will either
replace the pumps in the tanks or put
some kind of booster pump inline.
Do you think this is feasible? Could
I put an inline booster pump in the
fuel line to raise the fuel pressure
and volume to an acceptable level?
or do you think this would overrun
the carb with fuel?
Also, how hard is it to replace the intank
Fuel pumps?
JOhn MOnroe
John, if your state has an agency, such as a Bureau of Automotive Repair, I'd sure report this shop/mechanic to it because the specifications for the pumps in your carburetted vehicle call for each pump to deliver 25 gallons of fuel per hour at a pressure of 4.3 PSI. This is from the Ford factory shop manual. Even this 4.3 PSI is further reduced by that little Tee fitting which is there to prevent vapor lock by keeping a constant flow of fuel in the lines. As I said, I'm going to send you some tests to do, don't get fixated on fuel volume/pressure as your problem, the Holley carb has a lot of problems of it's own.
Thanks Kent,
I figured as much. I dont think they were really trying to rip me off, I just dont think they found the real problem. Thats why I told them not to replace the pumps.
Im starting to suspect the carb as the problem. I dont really have any experience rebuilding carbs.. except for a 1 barel carb in shop class in high school.. ha ha ha... but I will take a look at that list and try to narrow it down.
JOhn
John, does the engine actually quit at 45 MPH and have to be restarted, or does it go "flat" at that speed and just wont go any faster?
it just leans out and quits. If you take you foot off the gas, let it slow down a little, then ease back into the gas it will run, but around 45 or 50 it just sputters out and dies.... just like vapor lock. Feels like it just runs out of gas. Its strange because it can handle high rpm/load under 45 or so but not over. Its like the float bowl emptys out and it just starves....
JOhn
John,
Sounds like you might have the primary float set to low. I had a similar problem with my 82 460 and solved it by loosening the lock screw on the float adjuster and turning counterclockwise about a 1/4 to 1/2 turn. I would start there and see what happens. Also, if you remove the sight screw from the fuel bowl, fuel should trickle out of the hole. Do this on a level surface.
Well I had the mechanics replace the filter in the carb and the Fuel Select valve and the van runs like a champ again. Thanks for all the advice guys. It did however fail the idle test at emittions... so I will be taking it in to a shop with the proper equipment.
Well I had the mechanics replace the filter in the carb and the Fuel Select valve and the van runs like a champ again. Thanks for all the advice guys. It did however fail the idle test at emittions... so I will be taking it in to a shop with the proper equipment.
Just put a manual feul pump on it it will solve everything cause your electrnic ignition box part went for the feul pump which would be electronic and to buy a new ignition box would be more than what you can buy a manual full pump for