MAP sensor operation

RV and bus conversion info since 1996.

Share Your Feedback

PRINT PAGE

RV Classifieds

		2005 Newmar Dutch Star 4320 - $239,896
		Demco Kar Kaddy KK360SB - $1,000
		1977 Custom Built 2004 Conversion - $62,400
		2000 Winnebago Adventurer - $64,500
		2002 Beaver Marquis - $325,000
		VIEW ALL
		Search RV Classifieds
		Classifieds Policies
		Benefits for Dealers
		Sell Your RV
		Dealer Signup

Useful Links

RV Community

		Discussion Groups
		RV Articles
		RV FAQs
		RV Classified Ads
		Virtual RV Park
		Shop at our Store
		RV Lifestyle Books
		Rate Your RV
		AllThingsRV.com
		MyRVGuide.com
		RVMechanic.com
		Advertise With Us

BECOME A MEMBER

RV Resources

		Best Rate RV Loans
		e RV Loans
		Visit Rio Rancho, NM for Winter
		RV Dealers
		RV Manufacturers
		RV Rentals
		RV Glossary
		RV Types
		RV Ratings

MAP sensor operation

Home > Discussion Forum > Mechanic's Corner - Engines

email Lenny

reply to message

post new message

search forums

hidden layer

ATTENTION: All Postings that advertise items for sale will be deleted from the Discussion Forum. You may post sale items for free in the Classifieds section. Sign up now.

All Messages in Thread	Author	Date
MAP sensor operation	Lenny	4-30-08
1995 454 MOTOR HOME. MANIFOLD VACUUM IS 22Hg. WHEN MAP SENSOR IS CONNECTED ENGINE DIES. MANUALLY APPLY VACUUM TO MAP AND RUNS GREAT UP TO 17Hg ON HAND PUMP. AFTER 17 ENGINE QUITS. ANY TAKERS?? MAP, o2, IAC, EGR TPS ALL CHECK OUT. SOME QUESTION ON FUEL PRESSURE BEING LOW AT 15-18 PSI. OEM PUMP, PULSATOR AND PRESS REGULATOR
Re: MAP sensor operation	BUBBA THE BUS TECH	4-30-08
First what is the spec for fuel pressure? This is a critical value, but chevy is pretty poor at getting closer that 10% + or -. Next the easiest way to think about you map sensor is to think that the engine computer just takes several inputs and does basic math. TPS+MAP+Temp+EGR X Block learn = This much fuel. If the engine is cold the computor just run off the calculation. When the engine is hot it adjusts and learns off the o2 sensor and knock sensor. If the vacume signal is low to the MAP it adds fuel. IF the MAP reads high it reduces fuel. If there is a low fuel pressure or low flow problem can be disguised by unplugging the MAP. I actually got a car home this way as the little piece of hose in the tank between the pump and the pipe was split and bypassing into the tank. Unplugging the MAp richened the mixture up untill it would start run and drive at light throttle settings. It sounds like you have a lean condition and the MAp being disconected allows it to run. Figure out your fuel pressure problem then plug your MAP back in and see how it goes. Good Luck
Re: MAP sensor operation	susan	4-30-08
Hello Seller, I came across your ad and I'll like to know the following questions regarding the ad.,but before i proceed on this transaction i will like to ask some question as follow. i can only raise certify check for the payment of your item so i will like to know if the item is still available and also if is in good condition Please your answer on this, will enable me to issue your payment to you asap, 1. Do you accept a ( Certify Check ) as a mode of payment 2.] What is the firm price of the item? 3) Will you let our shipping company to come to your house for the pick up of the item? 4)Do get back to me with your contact info where you want the payment to address to. 5) Will you be able to send the excess fund back to the shipping company via western union money transfer same day you recieve the check....I'll like to have the response to these question in your earl! ie! st conviniency'Hope to hea! r from you soon. Thanks.... Susan........