Yeah I agree you’d better sell it, take a loss and get something else. Then take it to Pep Boys for an oil change.
Engine idle issues still part #2
- Thread starter BG1988
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
gooffeyguy
Tom
When I read the first post I was going to say that your problem sounds like a vacuum leak. Seems you figured it out though
2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18
2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18
avalonandl
Full Access Member
Those wire harnesses are known to fail.....
When you do, pull all the covers they probably shouldn’t be going into and put love notes that say stuff like “what are you looking in here for?” “NO TRESPASSING” and “Surprise Muddafukka!”
the reading is 92KPA (0.92 bar or 13.34psi) with ACC on
Idle =27-30kpa load = 27-30 kpa
it should be about 89KPa(at lest close too) idle and 30KPa at about 75%-80% throttle
i'll test drive it around the block with the map sensor disconnected as it's only required on Super or turbo charged engine anyway
it's a NA engine...
the diaphragm is probably bad on the MAP sensor.. or getting stuck and sticking when the engine is on
Last edited:
So all the automakers have been putting MAP sensors on millions of non-supercharged vehicles all these years for nothing? I mean... they don’t use that signal to help determine load and adjust engine parameters or nuthin’? Are you sure about that?
LMAO.toyota does not use them and it tells me the engine load percentage via live scan tool it's NEWER as well 2013
So go ahead and pull yours. I’m sure you’re smarter than GM. Idiots, putting MAP sensors when they aren’t even needed. SMH. Stupid engineers.
iamdub
Full Access Member
I thought the vehicle of subject was a GMT900.
Toyota also had a hydraulic cooling fan motor. I guess an electric fan motor is yet another archaic design employed by GM that isn't required? Some vehicles run a speed-density tune and don't have a MAF sensor- GM's use of a MAF must not be required, either. Rip out all that unnecessary clutter and drop in a good 'ol tree fifty with a big ol' caw-buh-ray-durr.
