Question about 1997 GMC Yukon

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Gasoline presure - 1997 GMC Yukon

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44 to 55 , These trucks will not start if its a couple lbs below specs

Posted on Nov 13, 2009

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Fuel pressure at the shredder valve should be 62 to 65 PSI with fuel pump primed (engine not running) and will drop about 5 psi when the engine running. Good luck, any other readings the engine will not start.

Posted on Nov 13, 2009

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1 Answer

Have changed fuel filter, pump, and screen. Not always but will loose power and then all of a sudden take off and be alright.


Check the catalytic converter. Or your cars geting vapor locked. Caused from over filling with gas...Puting that extra 25 cent of gasoline in your car after gas nozzle clicks. It goes down the vapor line and cloggs up you charcoal canister.After presure is greater than your gas pump...you car will stall or shut off.

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The service engine light is on and when I get up to 65-75 the vehicle jerks a bit


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you must get the codes read go to a garage they usually wont charge for it, It can be 02 sensors you may have 2 or more , your computer is detecting something wrong and if it does **** at that speed sounds like 02 not sending proper info to computer start there then work back , gas filter , fuel pump presure, air filter, plugs, fuel injectors , bad gasoline water contamination, engine over heating, thermostat stuck, all the best take it and get your engine light codes first read the code will help you garge or you take those codes to dealer and ask them there is a manual for codes trouble shooting, cheapest thing you can do right now

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If the smoke is white, it is caused from burning oil. It it was gas it would be black. If the smoke is coming from the exhaust pipe then the oil is leaking into the combustion chamber of the engine. If it is coming from under the hood then there is an external leak that is getting on the exhaust system and burning off.

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Sounds like there's a leak in the fuel line, or the evaporative emission system is flooded with gasoline and is purging it to the atmosphee.

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Gasoline is not getting into the motor it has not enough presure, its an Econoline van 1997


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1 Answer

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Tried to start my 1998 Gd. Cherokee Lmtd. but it seems doesn´t pump gas


Hi, you should start by checking all your fuses,if they are all good ,check fuel pump relay, if this is ok , check fuel filter, if filteris good ,you should run a fuel presure text, this will determine if your fuel pump is ok, good luck.......

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