i was on my way home from work when suddenly my car died and when i started it back up it wouldnt idle unless i give it gas and then even when i give it gas its breaking up almost like it has a cam in it...there is no knocking what so ever, didnt throw any engine codes, the oil is clean as a whistle, the only thing is that when i hold the gas in say 2500 and its sputtering or what have you, if i got wot itwont sputter it revs but then when the rpms fall down it dies agian.when holding it at a steady rev it will sound like its backfiring but its coming from around the headers when it does so...i do know that its running a 9.8 on the a/f ratio and when i pulled the plugs (thought that was the problem) they were fouled and it still does it with the new plugs. the car was running some what descent on the 9.8 but i do know thats really rich so any input would be helpful. my mods are in my sig.

 

I don't know but I have a Maxima that started doing the exact same thing as you descibed to a T. I took it to a local shop and they the plugs, fuel filter and some other stuff. It ended up being the Mass air flow. It cost $350 for a replacement but the car ran fine after it was put on.

 

yeah i was thinking my maf to b/c it has ben preeeetttttyyyyy close to pegging out

 

the maf is a pretty good place to start, but it should throw a trouble code??

 

unplug your MAF sensor and test drive it. I had a identical problem 2 years ago with my 93 GT and it's MAF sensor.

 

maf sensor is my guess too

 

i would think maf too, but why is your afr so rich? i realize its supercharged but supercharged cars i worked on were in the 11.5-13 afr range.