Rough running ATI supercharged 86 Vette
Thread Starter
Drifting
Joined: Sep 2003
Posts: 1,652
Likes: 2
From: 1990 383 Stroker Baltimore Maryland
Rough running ATI supercharged 86 Vette
ATI supercharged 86 vette with Summit trick flow heads 24 lbs injectors msd boost timing master 6al custom programed chip installed 2 years ago with 3500 miles driven since addition. Car recently developed rough running condition after running the car hard.Changed the rotor cap, rotor plugs, and wires, no change. Observation, 3 plugs on the passenger side closest to the firewall show signs of too much fuel or unburnt fuel during the change of the plugs. The remainder of the plugs show normal ware. Oil pressures fine, no visible leaks, no engine codes thrown, no engine noise. Could it be a bad O2 sensor that has not thrown a code yet? Any help appreciated. Thank you Vetefast! :nonod: :nonod: :nonod: :banghead: :banghead: :banghead:
Race Director
Joined: Feb 2002
Posts: 11,268
Likes: 14
From: Honolulu, HI
Re: Rough running ATI supercharged 86 Vette (vettefast)
Tough to say. Could be bad sensor, MAF, O2 etc... Try pulling some codes and see what it says.
What Fuel pressure are you seeing at full boost?
What Fuel pressure are you seeing at full boost?
Drifting
Joined: Feb 2002
Posts: 1,937
Likes: 2
From: Arvada CO
Re: Rough running ATI supercharged 86 Vette (vvv90)
damn...so you said these problems started after running it hard? how hard did you run it and for how long etc? I hope nothing internal is bent like a push rod or nothing? :sad:
Le Mans Master
Joined: Mar 2002
Posts: 6,920
Likes: 0
From: Richardson Texas
Re: Rough running ATI supercharged 86 Vette (krivera)
Make sure the oil dip stick is not being pushed up. If so, that would indicated a possible burnt ring land. That would also expalin fouled plugs.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Re: Rough running ATI supercharged 86 Vette (lead foot 85 vet)
Quite Untrue! Lifted the ring lands on #7, melted the top edge of #5, and really rough area on the edge of #1. All on one pass. Previous run, car ran very low 11 at 131 (horrible 60'). That run, car ran high 12 at 126 or so. This was an old combo when I ran a P-600B, 11.2:1 compression, stock pistons, and stock ECM with custom chip.
It can be done.
If you're not breakin' parts, you aren't pushin hard enough (until the clutch comes out of the car).
Aaron
It can be done.
If you're not breakin' parts, you aren't pushin hard enough (until the clutch comes out of the car).
Aaron
