C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine
Old Feb 20, 2015, 06:57 PM
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Old Aug 18, 2014 | 09:56 AM
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Default Car hesitates

I hope that someone can enlighten me on a performance issue with my car? When I stomp on the gas, my car hesitates. If I slowly give it gas, it's fine. It also runs fine on the highway.

Could this be an indication the Opti-spark is going out? Throttle position sensor? I appreciate any help you can give. Thanks fellow Corvette fans
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Old Aug 18, 2014 | 12:11 PM
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It could be any number of things... but I would start with a tune up... Plugs, wires, etc... Have you done any of this? I would guess it is more of a fuel delivery issue, but we have no baseline to go on given the limited information you posted...
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Old Aug 18, 2014 | 01:01 PM
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Originally Posted by silver84C4
It could be any number of things... but I would start with a tune up... Plugs, wires, etc... Have you done any of this? I would guess it is more of a fuel delivery issue, but we have no baseline to go on given the limited information you posted...
Thanks for the reply. I don't have much information on the car as I just picked it up. I'll see if I can find out from the previous owner whether it's been tuned up. Hopefully it's something as simple as that. There is no check engine light
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Old Aug 19, 2014 | 12:24 AM
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Mine did that when it had a vacuum leak.

I had the wrong size hose on my PCV connection and it leaked when the engine got hot and the rubber became flexible. I was lucky because it made a noise so it was easy to find.
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Old Aug 19, 2014 | 02:57 AM
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Originally Posted by Cliff Harris
Mine did that when it had a vacuum leak.

I had the wrong size hose on my PCV connection and it leaked when the engine got hot and the rubber became flexible. I was lucky because it made a noise so it was easy to find.
Thanks for the information. This is what I'm looking for, possibilities. I'll check the hoses. If the simple things don't work, I guess i will check plugs and wires. Looks like a pain though
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Old Aug 20, 2014 | 08:42 PM
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Think I found the problem. Previous owner added air foil and didn't get the air induction tube tight enough. As a result I had a vacuum leak. Runs hard now. Yippee for free fixes
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