A few weeks back I had a bad exhaust leak right at where the hot side meets the o2 housing. I fixed it after about a week of having the issue. Since that time things have gotten progressively worse. The car started up a bit weak, acting like it wanted to die out. Going down the interstate @ 70 the pedal feels heavy. Then the car stopped wanting to start all together and when it does it dies out unless I give it gas for about a minute. I went ahead and changed my front o2 sensor yesterday, and the plugs, they of course were blacker than black.
What should I try next? Change wideband sensor? Someone mentioned to me tps sensor maybe? As always any advise is welcome to begin trial and error I guess. This is my only car and I have to have it for school/work. Thanks

 

ttt

 

bump for a curve ball?

 

your wideband controls nothing on your car.
did you change the front or rear 02 sensor? if thats not it i would check your maf for a loose connection or maybe its just dirty

 

well i changed the front one. Then someone mentioned it might be the fuel pump then some said the injectors then i heard tps sensor. The guy who i had fixing my ac put my valet mode on and i was so worried about everything else going on i over looked that fact. It still wants to die on starting up and it feels heavy cruising. My o2 on my TT also registers @<.86 while cruising and it stays steady up to .92 not fluctuating at all. I figured if it was the injectors i wouldnt be rich, and same with the fuel pump. I can wot and it pulls fine. If i take it outta gear when coming to a curve or what not it will die and this is getting rough as most of my driving is in the city. Also for a while now before this started when i would go from reverse to forward it would go richer that the wideband could show and stick there. I also just changed the FPR and that wasnt it either.

 

Checked the maf looks like it always does. Connection is fine. I guess it might be my tune. I have been running off the same tune for a good while now i dont see how it can all of a sudden give me trouble. The guy who tuned it, tuned it way rich. Cruising at 70 a/f is 11.9-12.4ish. And i cant even run my ac. I just changed condensors and now going anywhere with it on it steady kicks on and off over and over. cant run it while its idling either or the ar will stall. but thats a whole other story i guess.

 

check your IAC motor i had similar problems and it fixed it https://www.evolutionm.net/forums/in...motor-bad.html

 

Thats for the a/c issue right? Thanks i will check that one out.

Anyone have any ideas on my starting/stalling issue? Not just a guess like people have been saying but some real experience and a factual answer.

 

IAC is idle air control my car would not start unless i featherd the gas it would idle after i drove around and got it hot but after i turned it off it and tryed to start a few mins later same thing also wanted to die if i let rpms drop to fast

 

how much does the IAC cost?

 

I am curious. Just how did you "fix it"?

 

I didnt realize i had a leak all it was, the bolts were not as tight as they should of been so they gradually backed out and fell away.

 

If it was the IAC, would that also cause the o2 readings to be .91 while cruising down the interstate? Or even going like 45 to school this morning they were .87ish.

 

no the iac being bad wouldnt cause a fluctuation of ur wideband voltage because there in no way connected, the wideband voltage is one of the sensors used to help the ecm determine proper air fuel ratios, whereas the IAC idle air control, is a part that helps smooth the idle out by allowing a certain amount of air around the tb to help maintain a smooth idle... my guess with it cuttin out look into vacuum and or boost leaks first, then use the search on here to test ur IAC and being ur an 8, more then likely iac bad....good luck report back

 

See its not so much the wideband thats fluctuating, its the o2 reading on the turbotimer thats is wired into the ecu that is showing it rich. My car right now is all jacked up and its getting really old. I looked at the post that was linked for checking the iac. I just didnt know where it was at first.