How to diagnose and resolve engine issues using Durametric.

[tonycarreon]

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."

[tommy583]

I hope you can find the problem. I've had the same problem for over a year and can't figure it out.

[jaykay]

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

[NewArt]

Thanks for the link. Really interesting videos! This guy does a great job of explaining a very technical diagnostic tool.

[wawa]

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
Chris

[Jager]

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.