Jrp1978

iTrader: (10)

Just had my car tuned again and ran fine for awhile then boom idles start to dip bad gas smell . This only happen every once in awhile. new o2 and all new sensors . I was tryn to think of other problems .... would the rear o2 harness have any effect on the from stuff if it got melted? Is there some grounding issues some where ? If so where do i check . Its almost like the o2 sensors work sometimes and sometimes dont? **** I dont know nor do i kn ow what to do

vaticano

iTrader: (8)

Mine does something similar. Try logging MAP when it happens. On mine the MAP value with the throttle closed in neutral will decrease then it runs real lean. I don't know what causes it but it is a place to start. I suspect the IAC but haven't had a chance to change it.

Jrp1978

iTrader: (10)

There has to be someone that has had a issue like this ? i dont even know where to start . Should i unplug the o2 sensor and see if it runs ok in open loop

vaticano

iTrader: (8)

Sounds like you don't do your own tuning, which will make it difficult to track down

Eurospec2

iTrader: (2)

If your MAP value is changing like that, it is symptom of unmetered airflow entering the system somewhere, i would start looking for intake leaks.

vaticano

iTrader: (8)

I did that last year, didn't find any. Even changed intakes. It only does it after I drive for an hour or so.

icanhaz69

doesnt your car have a MAF? that was my first guess , but MAP is a similiar sensor

Jrp1978

iTrader: (10)

its the ltfts

vaticano

iTrader: (8)

Exaust leak?