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Old 05-09-2014, 02:42 PM   #1
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hah! i like this guy.

"if we have these conditions, and you put an oxygen sensor in the car to fix it - you're an idiot."
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Old 05-09-2014, 06:46 PM   #2
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I hope you can find the problem. I've had the same problem for over a year and can't figure it out.
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Old 05-09-2014, 07:31 PM   #3
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I am experiencing a similar problem but it is intermittent....and random at hwy cruising speeds...no cel.

Soooo it feels almost like bad fuel.....so I will be changing the fuel filter. Not sure if the injector rail pressures are avail via OBD....could log them. Would one see anything
meaningful there ?

Let us know what you find
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Old 05-09-2014, 07:33 PM   #4
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Thanks for the link. Really interesting videos! This guy does a great job of explaining a very technical diagnostic tool.
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Old 05-10-2014, 04:35 AM   #5
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Check the MAF ground. I have a similar problem and last time we find out ground signal was spiking. Sometime signal is good, engine running strait. Sometime signal spike and engine have a thought idle or it hesitate. We have to check three things ( we know MAF is good)
1- MAF plug look in pour shape, might have bad contact
2- ground wire, make sure no short circuit
3-ECU might be going bad

You may want to look at that.

Good luck
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Old 05-10-2014, 07:18 AM   #6
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This problem started happening after replacing the AOS? I would double check all the hose connections to the throttle body and the three hoses to the AOS. Those hose connections take some effort to properly seat/lock-in.
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