lt1street

I have madz28 tuning an i love it but my car still runs right at WOT every shift and everytime i stabe the throttle black smoke some times there is a grayish black ??? carbon ???? still dont no what grayish black smoke is its really faint. But the running rich, is that problem other pple get after madz28 tunning or is it a diferent problem? Also might help you guys answer my question i get a back fire throw the intake some time at wot and when i drive through town at low rpms (crusien) and give it a little gas fast(still in gear).thaxs for any advise!!

1racerdude

What is your fuel pressure?

lt1street

when i put in the 255 lph pump it was 44 psi

1racerdude

Vacuum hose off or on?

lt1street

On i dont know what it is off

lt1street

would i benifit with a adjustable fuel regulator, I was tolded that the computer will just try to compensate. is this ture????

1racerdude

Probably no benefit if the stock one is working right.
Computer can't change fuel pressure,but your o2's will correct for over lean/rich if the fuel pressure make's it run rich/lean but only within it's fuel map.
Call Madwolf and see if he has an answer as to why it is running rich 'cause he knows how it is set.

I think it's suppose to be 39 with hose on and 45 or so with hose off.Been so long since I fooled with a stock set up I don't remember exactly.
There are several sensors that will cause it to run rich at idle like the TPS.