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Luke Brigman Posted on Mar 28, 2013
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My 94 yukon starts to choke out and backfire when the engine temp reaches normal, what would I need fix?

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Bill Boyd

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  • GMC Master 53,816 Answers
  • Posted on Mar 28, 2013
Bill Boyd
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Have the fault codes read and replace the faulty sensors. possible o2 sensors --water temp /air temp sensors.

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  • Posted on Apr 10, 2014
Tony Mays
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The metle line that comes out of the moter is lose in sidy the cunekter and you can move the line back and forth will thes macy the moter run bad

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Anonymous

  • 707 Answers
  • Posted on Aug 15, 2010

SOURCE: 94 safari will only start w/stater fluid, then

Yes it could very well be or the electronic choke control.Hope this helps.

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Anonymous

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  • Posted on Nov 21, 2011

SOURCE: 2004 gmc yukon is overheating and air conditioning blows cold air. i cracked open coolent reservoir and it gurgled so i shut it. then the heat started working and the engine temp went down, but not n

bleed the air from cooling system. and make sure its full of coolant. replace thermostat if need be. good-day ! if above fails replace coolant reservoir cap, it may not be releasing pressure as need be. and its over heating. just remove cap and start car to see if it over heats. if it still does, repair as above. and be sure the cooling fans are working. but an improper seal of the radiator cap or pressure malfunction of the cap is an easy (and cheap) source to check first. If the pressure in the radiator is not high enough, the fluid will boil at a lower point and the resulting steam cannot flow through the cooling system.

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Related Questions:

0helpful
1answer

I have a 1995 GMC Yukon 5.7 cold start up perfect for 15-20 minutes once it reaches normal running temperature engine starts poping backfiring and stalling

You definitely need to get your timing light out and hook it up and my guess would be that your timing is advanced a little too much.
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2005 gmc yukon denali xl engine fans dont come on

under the hood I would check the thermostat to make sure it open so that the hot antifreeze reaches the sensor to make the fan start
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I have a 1999 yukon that keeps having fuel delivery issues. I sometimes have to put gas in the carburetor just to start it. It will run for about 30 secs and then starts to choke. It then dies on me. It...

Sounds like a weak fuel pump.Check the fuel pressure it should be 60-66 psi with key on and engine off.If its below 52 then it does not have enough pressure to open the popit valve in the injector to allow fuel thru.
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Engine stalls at operating temp. and will not restart until cooled down, when started will sometimes backfire ?

sounds like your auto choke is stuck on had the same problem with a honda i worked on would be fine untill got to running temp then would run like **** and stall out and wouldnt start again till cold
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Tcm location on 94 villager

I believe it's at the bottom, left side of the center console.

Go here and join the Villager yahoo group for extensive files & help.

http://groups.yahoo.com/group/villagerquest/

What's wrong? There's a TCM on ebay real cheap, but you may not need it. Need symptoms.
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2000 yukon fishing for idle on cold start.

Check for vacuum leak at intake or plenumn while it is cold , also check temp sensor. i have done a few intake manifold gaskets on these vehicles.
1helpful
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Vehicle chokes, sputters, and then shuts off

Start with the simple and replace the fuel filter. The fuel filter may have reached the end of it's life time and is dirty causing the issues you have. The worst is the fuel pump it self has gone bad and needs to be replaced, the fuel pump should be producing 62 to 65 PSI when the engine is started and should drop no more then 5 PSI when the engine is running. You can check the fuel pressure at the shredder valve with a fuel pressure gauge. Good luck and keep me posted, be glad to help get your Yukon running 100% again.
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Have 94 toyota corona 1800 auto that has just started taking longer 2 change n2 top gear when first started.ok once warmed up.270000 kms so not worth spending much on it.is there a quick fix?

on some toyotas they lock out hi gear until the engine temp reaches a preset value ... thats to prevent lugging down a cold engine .. there is sometimes a light on the dash that indicates low engine temp .. when it goes out then the high gear is enabled ... if yours is now taking longer than normal then you might have a bad thermostat (causing engine to take longer to warm up) .. of course at 270,000 miles you might be pressing your luck if thats the original transmission .. those cars seem to last forever (almost) ..
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High idling at low temp.

Hi,

Offhand, yes this would be normal. The high idle is brought about by the auto choke whose purpose is to hasten the reaching of operating temperature of the engine. The fact that the idle RPM goes down after some time is a good indicator, it tells us that the auto choke is working.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.
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