1984camaroz28

MY car hesitates when u hit the gas but revs fine in park. But when u rev it it smokes black. So black n 24 miles my bumper is black......

My Red 93Z-28

if black smoke comes out when you rev it then you are running rich, the same thing is happening to me.

tanmanski

I cant access your car info, but do you have the 305 4 barrell or is it TPI? If it's carbed, is it the original carb? My '85 T/A does same thing & I know what the problem is on mine at least

1984camaroz28

94 z28 LT1 ......LOL my 84 camaro has a 454 in it lol

1984camaroz28

and the problem was.....

My Red 93Z-28

You're running rich, too much fuel, You probably need a new tune.
Have you done anything to the engine before it started doing this?

chrp3rd

first thing is to replace your O2s cause if you are running that rich then they are done that might fix it but might not but trust me if it isnt they are no good anyway cause that much rich will kill them if not check for a vacuum leak because if the car has a vacuum leak the computer will sence a lean mixture and it will advance the timing and make the engine run righer to fix the problem cause rich is better than lean lean causes piston damage if not any of that check the hose on the fuel pressure regulator ove seen were the hos gets so old and brittle it cracks and falls apart jumping up the fuel pressure really high if that does not help let me know

1984camaroz28

.... never had a problem had a mad z28 tune for over 5 months...whouldent it be easyer to scan it then start guessing and replacing parts

IllusionalTA

Yea well is it popping any codes'? could be your 02 is stuck lean and the puter's dumping fuel.. Or your maf is fubar'd.. Scan it and find out what she's doing..

1984camaroz28

may lap top is not working..... I think its my o2 sensor.... check engine light is poping on and at higher RPMS and WOT its fine