Quote:
|
Originally Posted by ThillyGooth
mileage is high, 160K
however, last emissions the record shows it was so low, literally close to 0 on almost all tests. this was a huge increase. The throttle something was recently replaced because it was idling high. I am thinking it is just an adjustment, would replacing or rebuilding something in the throttle controls be a likely cause for this?
the car honestly has had near perfect tests in the past, it is boggling my mind
|
Something has happened since the last test, and I suspect it's in the Lambda system. Like I said previously, it could be something simple - like a connector not connected - or it could be complicated. I would not even hazard a guess without first doing a visual inspection looking for things like disconnected or not fully seated electrical connectors, and then doing some diagnostics like checking the duty cycle and scoping the O2 sensor wave form. Even if you don't have a "check engine" light, check the system for error codes. You need to familiarize yourself with the Lambda system including its OBD - lots of information including diagnostic tests you can download from the two service information sites - then start doing diagnositics.
Just guessing and replacing parts willy nilly is a losing propostion.
My recent California ASM emission results are in the link I gave in my first post. You should start by reading it and then look at the links in that thread.
Duke