6v92 will not start after 20-45 minutes off, has run well

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6v92 will not start after 20-45 minutes off, has run well

Home > Discussion Forum > Bus Conversions - Transit

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All Messages in Thread	Author	Date
6v92 will not start after 20-45 minutes off, has run well	todd-	10-22-07
I have recently purchased a bus with the famous 6V92 turbo with electronic fuel management, I can not get it to power back up (Start) I am not well studied here but have checked what I have been told. Including sheer pin in blower and rotation of the fuel pump. I took the fuel pump off and can see that it draws only small amount of fuel( 1-2 gallons or less per minute, does anyone have any thoughts? I was told this pump should produce 20 plus gallons per minute, whats the real specs and can anyone help.
Re: 6v92 will not start after 20-45 minutes off, has run well	Mark O.	10-23-07
First off, what is the engine doing when you say it doesn't start? What was the engine doing the last time it ran? How much fuel is in the tank? How fast is the starter turning the engine? Do you have a full 12-volts going to the DDEC? What does the lube oil look like? If it is really ugly black, then everything is most likely okay. If it is chocolate colored, milky colored, or any other color than black you may have a serious internal problem. Diesel engines are pretty simple--fuel, air, compression. If you don't have all three you don't run. The most common problem is lack of fuel. With a 2-cycle DD, losing prime is a real possibility. If you have lost prime the lift pump does not have the ability to reprime the pump. Take the filters off. If they are not clear full to the top of the filter, you have lost prime. Since you have opened the pump, you most likely lost prime. You are going to have to go through the priming process before you can start the engine. E-mail me direct and I might be able to help you troubleshoot in a faster manner. Mark O. Castle Rock, WA P.S. It would help to know what kind of vehicle the 6V-92 is in. MRO
Re: 6v92 will not start after 20-45 minutes off, has run well	Ben	10-13-08
I work on this in the Air Force, we have the same issue of loosing prime. Fuel pumps are rarely the issue. There should be a check valve prior to the primary filter (if you have a 2 filter set up), the check vavle will aid in preventing the fuel from draining back to the tank. Also, there could be a small pin on or dry rotted fuel hose. This type of engine I would suggest an external fuel pump for priming in emergencies. Did this ever get fixed, if so, what was the fix?