Suddenly lean???

[playtoy_18]

Just received V2 this weekend,plan to attend EFILive class in March.
Have nothing to tune with it yet :( But plenty of use with the scantool.
Haven't got a chance to try it out yet though,need to get some playtime before class-might just buy a truck or car to play with till my project is done.

[hquick]

Hi Ed.
Yeah....I was thinking headewr gaskets or 'donut' gaskets but what Mick described as the symptoms of his wideband playing up....I've seen the same thing with mine.
I'll try swapping out the sensor and see what happens ('cause it's easiest..Lol!).
Jez....I know you're lurking..the answer is still NO!!! I refuse to burn it. Lol!

[hquick]

Here's some pic's of the PLX sensor and it's connector.
Any idea where to get a spare or is it a PLX only thing?

[5.7ute]

Hi Howard.
The part number on that sensor 12575657 is a good number. If you do a quick search with that number it comes up exactly as the one you have in the pic. I will give my suppliers a call in the morning & see what I can come up with.
Cheers Mick
Here is a link http://www.bmotorsports.com/shop/pro...roducts_id/534

[hquick]

Well....got the new sensor and installed it. No different!!!

[jfpilla]

Howard,
That degree of lean happens with intake manifolds leaking.
It seems to go leaner as your car warms up. Something warping?
I see that you have disabled the AIR pump, but for kicks, try lowering B0204.
Just throwing out any ideas. "I feel your pain" with a hard to diagnose issue.
Joe

[hquick]

Thanks Joe....I'll give anything a try at this point.
There is no airpump installed on this vehicle...does that make a difference?

[jfpilla]

Howard,
If there's no AIR pump ignore that part of what I suggested.
I hate to see you go through this. I've had some frustrating situations, but they always get resolved.
Joe

[Aloicious]

Well....got the new sensor and installed it. No different!!!

dang, that sucks man, I still believe that if its running good and without issues that its not actually running at 19+AFR. check your PCM and wideband grounds maybe? if you're using a common ground point for the wideband and narrowbands, and it has come loose or something, perhaps that is the culprit?

maybe look/feel around the head/headers to see if you have leaks there?

[hquick]

I just changed the throttle body back to the older one. Still no change (clutching at straws here).
I have been using the same gasket over and over....is that an issue?
Here's a small log.
Can anyone tell me if the NBO2's are reporting the same lean condition as the PLX WBO2?
The PLX 'box' seems very hot.