1996 LT1 stumbling please help me
Thread Starter
Intermediate
Joined: Aug 2003
Posts: 31
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From: Tulsa OK
1996 LT1 stumbling please help me
I have a 1996 LT1 Corvette that has been modified by removal of the cats and the resonator (there are straight pipes from the exhaust manifolds back to the mufflers). When I got the car it ran very well. Now it runs very ragged, with a rough idle, and poor, stumbling acceleration. It is putting out a lot of smoke when you step on the accelerator, but only from the right sided tailpipe. I took all of the plugs out, and the right sided plugs were all coated with carbon. Left sided plugs had normal wear. I replaced the plugs with no change in the problem. Since then I have taken my Corvette to a shop, where they have replaced O2 sensors, EGR valve, checked vacuum lines, distributor and distributor wires, and nothing has made the car run better. Has anyone here had a problem like this? I appreciate any help.
Thread Starter
Intermediate
Joined: Aug 2003
Posts: 31
Likes: 0
From: Tulsa OK
Re: 1996 LT1 stumbling please help me (cprgmr)
Nope. Another thing I forgot to mention is that I am now getting about 180 miles from a tank of gas, when I was getting better than 300 before.
Team Owner
Joined: Sep 2001
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From: Athens AL
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Re: 1996 LT1 stumbling please help me (jgentgesdo)
If you already replaced the O2 sensors, and cleared any stored codes (disconnecting the battery will do so) then I would guess this is an Optispark-related issue.
Racer
Joined: Jan 2001
Posts: 425
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From: Frederick MD
Re: 1996 LT1 stumbling please help me (jgentgesdo)
96 has 4 O2 sensors 2 pre-cat and 2 after the cat, just curious, what did you do with the after cat O2's? Not that they affect A/F mixture, but they'll throw a code, and maybe put you in open loop mode.
