Question about 2001 GMC Yukon

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Engine intermittently stumbles and stalls after taking off from stop. I changed filter, added 1/2 tank of fuel with STP injector cleaner. I had two more occurences after that and 120 miles back home. Is bad fuel an option? Are injectors prone to intermittent faults. 2002 GMC Yukon 111000 mi.

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Take carborator cleaner. First take off the big hose on the front of your intake then press gas peddal to open up and then spray it inside this fixed my problem. Jerry

Posted on Oct 13, 2008

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Won't stay running, fuel pump ok, neighbor mechanic said it does go on when I turn key. Had under 1/4 tank, warmed van up and went out 10 mins. later, stalled. added over 2 gallons on gas, on incline. Will...


You need to always start with a basic tune up, spark plugs, fuel filter and air filter, as the vehicle will not perform well if any of these three are bad. Then check all vacuum lines for cracks or breaks and replace as needed. You can also add a fuel injector cleaner into the gas tank. I recommend the black bottle of STP concentrated fuel injector cleaner, and you can purchase that at most Wal-Mart's. Good luck :O)

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Stalling at stop lights slow when taking off if you floor it engine stumbles but you take your foot off the gas the engine starts running fine


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My son filled the tank of his 97 buick century and within 10 miles the car started bogging down (and stalling) on acceleration. The behavior is the same regardles of whether the vehicle is in motion or at...


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I don't know what the STP cleaner may have done; I had a similar problem where my car would idle very low when stopped or in a drive-through waiting. It turns out there was black soot on the engine intake. I disconnected the rubber hose from the air filter at the engine (take cover off, loosen 1 clamp). I used a spray can of throttle body cleaner and wiped the area clear. I then had my dealer perform the programming change for a service bulletin that mentions throttle body coking.

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