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I sold my 98' T/A a while back to a buddy of mine. I just put headers on the car a week before that. Now the car smokes when he goes wot. My question is what do i change in the computer to get all the black smoke to stop boiling out the exhaust? (I did notice that the oxygen sensors are placed futher back in the headers than they were in the manifolds.)
I sold my 98' T/A a while back to a buddy of mine. I just put headers on the car a week before that. Now the car smokes when he goes wot. My question is what do i change in the computer to get all the black smoke to stop boiling out the exhaust? (I did notice that the oxygen sensors are placed futher back in the headers than they were in the manifolds.)
It is likely the LTrims have gone very far in the positive direction. This will cause additional fuel to be added during WOT if you are in cell that is positive when you go WOT. The "correct" fix is to recalibrate the VE and MAF tables. You would also set the PE table during this process. If cats have been removed you want to disable COTS. You will need a wideband sensor to recalibrate the tables. There is no way around that if you want any decent level of accuracy.
If you decide to use a tuner make sure they either tune the VE/MAF tables on the street with a wideband or they use a dyno with load capability. Anything less and you won't be getting your money's worth.
Check for exhaust leaks before you do anything. Even a small leak before the O2 sensors could cause the fuel trims to go very postive when they shouldn't.
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