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Old April 13th, 2011, 08:46 AM   #1
ericeclark
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Default 2004 yukon wont start - any help

My 2004 yukon will not start. after having front end work done the check engine light came on, i had the guys at good year in georgia clear the code before leaving the shop. I drove it for a while and shut it off to get gas the light came back on finished driving the 700 miles from georgia. Now the damn thing wont start. Smell of gas after turning it over. p0100 code shows up for MAF or VAF sensor. Dealer said those should not make it not start any GM people with help.
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Old April 13th, 2011, 08:54 AM   #2
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My 04 did the exact same thing when the fuel pump pooped all over itself. There is a pressure relief on the fuel rail that is easy to get at. I drained the pressure, turned on the key, and I didn't have any pressure building.
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Old April 13th, 2011, 09:53 AM   #3
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Rarely have I had a gm no start that wasnt a fuel pump.
Try having some one smack the gas tank with a rubber mallet,well you try to start it,sometimes the pump will lock up and this will make it run long enough to get it somewhere to work on.if it does start,dont shut it off.
You can take off air filter and pour a little bit of gas down the throttle body and see if it starts for a second.if you do that make sure you hold the throttle open,so the gas goes down the in the intake,doesnt puddle and start a fire.
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Old April 13th, 2011, 09:57 AM   #4
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Thank you for the help i will start there.
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Old April 13th, 2011, 12:34 PM   #5
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Another thing is have a buddy turn the key to the run position and listen for the fuel pump kicking on and priming the system.
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Old April 13th, 2011, 12:43 PM   #6
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Quote:
Originally Posted by tctrojan17 View Post
Another thing is have a buddy turn the key to the run position and listen for the fuel pump kicking on and priming the system.
This won't tell you anything. My pump in my yukon continued to run, even though it wasn't pressurizing the system.
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Old April 19th, 2011, 05:30 PM   #7
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Use the parking brake much? My wifes does, and on her 04 the mechanism for the park brake rubbed through a harness and cut a couple of wires - bingo, no start.
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