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Old 04-29-2008, 08:24 AM   #1
kingkon
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Default 2000 yukon erratic idle


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hello to all. I am new to this forum and this is my last stop to find info on a problem I am having. My 2000 yukon (new body style) has a problem with the idle. Mainly when the ac is on the idle goes up and down as the compressor kicks on and off. It also does it when thier is nothing on. I was told by the dealership numerous times it was the fuel injectors. I have had them cleaned several times no help. If thier is anyone with this problem and knows how to fix it would be a great help.
thanks in advance
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Old 04-29-2008, 08:34 AM   #2
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Try getting yourself some throttle body cleaner spray (Seafoam makes a product called "Deep Creep") and clean out the throttle body at the flapper and all around it, then also get some cleaner spray for your Mass Airflow Sensor (located between your airfilter and air tube going to the engine)(also the spray must be for your MAF, anything else might damage it). Try those, both help me greatly with my idling problem and also made my truck run better as well.
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Old 04-29-2008, 09:02 AM   #3
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Quote:
Originally Posted by Rivieraracing View Post
Try getting yourself some throttle body cleaner spray (Seafoam makes a product called "Deep Creep") and clean out the throttle body at the flapper and all around it, then also get some cleaner spray for your Mass Airflow Sensor (located between your airfilter and air tube going to the engine)(also the spray must be for your MAF, anything else might damage it). Try those, both help me greatly with my idling problem and also made my truck run better as well.
will try it today. Thanks
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Old 05-05-2008, 08:06 AM   #4
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Quote:
Originally Posted by Rivieraracing View Post
Try getting yourself some throttle body cleaner spray (Seafoam makes a product called "Deep Creep") and clean out the throttle body at the flapper and all around it, then also get some cleaner spray for your Mass Airflow Sensor (located between your airfilter and air tube going to the engine)(also the spray must be for your MAF, anything else might damage it). Try those, both help me greatly with my idling problem and also made my truck run better as well.
I want to thank you for the heads up on the Seafoam products. I did the treatment this weekend and it is a miracle. The erratic idle is gone and the yukon runs nice and smoothe now. It is amazing that the dealer changed a bunch of parts (thankfully under warranty) and could not find the problem and a simple 6$ bottle of seafoam took care of the problem. Thanks again!!!!
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Old 05-06-2008, 12:18 AM   #5
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No problem man, I was not sure about doing it myself but finally broke down and did it, helped me out a ton on my idling problem!!
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Old 05-06-2008, 06:29 PM   #6
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What cleaner would you recommend for cleaning the MAF sensor? Also, is it easy to unhook? Just a few wires/connectors?
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Old 05-06-2008, 07:57 PM   #7
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Mine did the same, and cleaning the Throttle Body did the trick too.
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Old 05-06-2008, 10:09 PM   #8
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I just did the seafoam thing in my 2000 Yukon SLE too, along with a pretty thorough throttle body cleaning with Deep Creep. Man, that stuff is great. I used the PCV line to suck a little less than half of the seafoam in, then dumped the rest into the crankcase and added an additional bottle to the fuel tank. My truck smoked pretty good for about 4 minutes or so, but after that it was done. Initially I didn't notice all that much difference...but today, holy hell, you can REALLY feel it once you get into the pedal a bit - the low end really got restored on my 5.3!

I'm going to run another can through next week, just to make sure that all the carbon I loosened up in the throttle body gets removed.
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Old 05-07-2008, 12:30 PM   #9
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Quote:
Originally Posted by nephite1978 View Post
What cleaner would you recommend for cleaning the MAF sensor? Also, is it easy to unhook? Just a few wires/connectors?
I cleaned the throttle body with the seafoam "deep creep" . It removed tons of soot from the tb. I did not touch the maf sensor and everything worked awesome.
Good Luck
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Old 05-07-2008, 12:40 PM   #10
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Quote:
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What cleaner would you recommend for cleaning the MAF sensor? Also, is it easy to unhook? Just a few wires/connectors?
What kingkon said. Unless you are having issues specifically related to the MAF sensor, I would NOT mess with it. The little wires running across the inside are extremely fragile and easy to screw up, which would cause you all sorts of headaches.
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