Question about GMC Yukon

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I have a 2005 yukon with a 4800 vortec engine, it starts fine when the engine is cold but after it has warmed up and sits for 10 minutes or so it starts hard taking 3 to 5 five seconds to start while turning over.

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These vehicles are known to have problems with the injectors and the fuel pressure regulators. leaking fuel into combustion chambers.most notable after situation your describing

Posted on Dec 06, 2008

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Posted on Jan 02, 2017

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I have a 2005 Yukon Denali 6.0. I was driving it down the highway and the check engine light started blinking, I lost power and he car died. I let it sit for a minute it started back up but it has


Trust no one. Get yourself a compression tester and test each cylinder yourself after removing the plugs. They should all be within about 10 psi of each other - if you have no compression you will get a big fat zero reading

Sep 15, 2017 | 2005 GMC Yukon Denali

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No heat just cold air


Is the gauge showing the engine is warming up to normal temp ?
Are the heater hoses getting hot ?
If the heater core is getting hot, it could be a blend door problem. The blend doors direct air thru the heater core and the ac evaporator among other things.

Dec 06, 2012 | 2005 GMC Yukon

1 Answer

I have a 97 s10 and starts and runs fine when cold but after it warms up i have to hold the gas peddle down to the mat before it will start again and when it does start it revs up to 1 1/2 to 3000 rpms and...


The repair for this is to scan the computer and see what codes are present if their are no codes indicating the TPS switch the problem will be your fuel pressure regulator.This is a fairly big job it requires removing the intake manifold if this is the 4.3L vortec engine.But Iam not sure which engine you have so this applies only to the Vortec Engine.

Apr 29, 2011 | 1997 Chevrolet S-10 Pickup

1 Answer

Have a 2005 yukon xl with climate control a/c blows warm air


Does the front blow cold ? Diagnosing rear problems
Taking to a qualified repair shop an having it diagnosed would be your best bet >

Dec 13, 2017 | 2005 GMC Yukon Xl Denali

1 Answer

2.0d x-type 2005 Est. Starting problems when engine is warm


Ok, time for car school. The vehicle is operated by the computer, every electrical concept that is. When the engine is cold, it starts fine because the computer has placed it in "cold start mode", putting more fuel into the engine than normally would until Once the engine is warmed up, a temperature sending unit or temp sensor tells the computer to change to normal run mode. IF said temp sensor is faulty and is not telling the computer to make said change, it stays in cold start mode, still dumping excess fuel in the engine that is now not required, cause it's warmed up. Like keeping the choke closed on older vehicles. Now I think you can answer your own question, when this no start action is happening after warm up and it always starts fine when cold, what's the first thing you check ? Right, the unsuspected temp sensor. Change that and no more start problem. Have a wonderful day. Glad I could be of service.

Jul 11, 2017 | 2005 Jaguar X-Type

1 Answer

After my S-10 sits about 30 minutes it sometimes


are you saying it starts fine cold but when hot or warm it has trouble starting, give more descriptions of conditions... weather related issues... any check engine light ?, stored codes ? any recent repairs ? give all you can..

Jul 29, 2009 | 1998 Chevrolet S-10 Pickup

2 Answers

4.3 L Vortec problem, can anybody point me in the right direction


check the temperature sensor for the computer. it may be telling the computer that the engine is still cold and causing the engine to run too rich at warmer temps

Jan 16, 2009 | 1994 GMC Jimmy

2 Answers

1990 dodge colt,does not want to start in the cold


If it starts with a shot of WD-40 then fuel delivery is obviously a problem when cold. If intake air temperature sensor ( for one) is telling it that its still real warm out, then it won't give it enough fuel to start on a cold day, which requires more fuel.

Dec 19, 2008 | 2005 Ford F-150

1 Answer

Missing when first started. Stops when warms up.


016 Engine Misfire Misfire Scan Data Find someone who knows what scan data is an knows how to use it .Intake manifold vacuum leak .
Rough Running When Cold GMC Yukon

Jun 19, 2017 | 1998 GMC Sonoma

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97 saturn sc2


I had the same problem with a 97 sc2. The fix for my car was the temp sensor that controls the extra fuel when engine is cold it didn't sense that the engine was warmed up and added extra fuel flooding the engine.

Jul 22, 2008 | 1993 Saturn SC2

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