Engine skipping please help.
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Joined: Nov 2006
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From: Panama City Florida
Engine skipping please help.
I have a 1993 corvette LT1. I rarely get on the engine really hard. However, today I raced a Porsche Carrera (won by the way, I thought those cars were faster). Anyway, when my engine got up to about 4900- 5200 rpm. It started to skip. I'm figuring it's the optispark I just wanted a second, third or forth opinion. My car has 119500 miles on it and the opti and water pump were replaced about 35000 miles ago. I know that since I've owned the car, no water has gotten near the motor. My next question is, how easy is it to change myself? If I do end up having to change it, should I go with MSD or ACCEL, anything but stock replacement. I'm fairly good around a motor but I've never worked on an LT1 motor. Any imput would be greatly appreciated.
Thanks,
Casey
Thanks,
Casey
Burning Brakes
Joined: Feb 1999
Posts: 1,157
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From: Encino CA
From my experience with my 95 LT-1, I found that even with horrible missing at idle and missing and hesitation under load, code would not necessarily be thrown. Everyone was shouting OPTI even though the opti had been replaced. Replacing the coil improved somewhat and finally bringing it in for service to replace plugs, wires, and fuel filter got rid of the problem. Don't immediately assume opti.
Doug
Doug
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Joined: Nov 2006
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From: Panama City Florida
Well, I've decided to take it to a mechanic and made an appointment for Wed. @8am. If it only does it at 4000-5200 rpm and it's going to cost a lot of money to fix. I'll just leave it. I don't get it up that high very often anyway. I'll post the results when I find out. Thanks guys....
Melting Slicks
Joined: Nov 2002
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From: 1993 Quasar Blue 'vert Scottsdale AZ
You didn't mention how fast that you were going. I just can't keep track of all the Porsches. Some are pretty-looking dogs, and some are super fast (maybe ZIX will chime in). I'm a Corvette guy, but if I had the money, there would be a turbo-Porsche in my stable (excuse my spelling, the martinis are starting to kick in). Anyway, doesn't sound like an optispark problem.
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Joined: Nov 2006
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From: Panama City Florida
Well, as far as the Porsche goes. We were dead stopped at a red light. I look over and this Porsche Carrera started reving it's engine so wlhen the light changed we took off. We pretty much stayed even until I hit third gear then I got about a car length ahead of it and in fourth started pulling away slowly. I looked down at one point and we were doing 86mph. So, as far as how fast we were going, I'd say I finally let off the gas somewhere around 90 and I was about a car and a half ahead. I might have done a little better if my motor wasn't skipping at the higher rpms. I'm glad I didn't spend all that money for a Porsche to get beat by a fourteen year old basically stock corvette. 
