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10-19-2007, 06:46 PM | #1 | |
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89 Corvette running issue
My parent 89 Corvette convertible has had a problem which corvette specialists cannot even fix. The car was driving fine and all of a sudden it started backfiring through the airbreather (a hickup as the mechanic called it). The car would not even stay running unless you were on the acclerator and it would die every time you used the brakes. I put some octane booster in it and it would stay running but had a terrible miss to it. So i drove it to a recommended corvette specialist and he told us it was the MAF sensor, so he changed it. It still did the same thing, so then he said it was the plugs, so we okayed him to change it. Still had the same problem. They replaced a couple intake gaskets and a couple vacum lines and it seemed to fix it. Two days later its doin the same thing. Sent it back and it was there for a week. He told us honestly that he doesnt know whats wrong with it and wished us the best.
The car is going to be put away for the winter in 2 weeks. So any solutions to this problem would be great. Thnks in advance for anyones input. |
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10-25-2007, 03:47 PM | #2 | ||
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Re: 89 Corvette running issue
Quote:
My problem still exsists at this time as well... but I need to drain the gas tank and try with fresh... that's where my problem lies that i know of.
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11-01-2007, 09:02 AM | #3 | ||
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Re: 89 Corvette running issue
Quote:
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09-15-2008, 08:49 PM | #4 | |
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Re: 89 Corvette running issue
Just to cover all bases take a set of hose crimping plastic pliers and crimp off the vacuum line to the brake booster. I have seen instances where the diaphram in the booster is bad causing a vacuum leak which in turn will make the car run like its missing, and be gutless. You said it dies when you hit the brakes which reminded me of a caprice I worked on a while back. It had the Lt1 in it but the symptoms were very similar and it ended up being the booster.
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10-14-2008, 10:19 PM | #5 | ||
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Re: 89 Corvette running issue
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Lesson: Let NO mechanic say words. SHOW ME. Corvette specialist? That's a funny. Right? What codes do you have? If no codes, check fuel pressure. Static (motor off), idle with vacuum ON FPR, idle with vacuum off of FPR, and pedal down (gauge taped to the windshield). Does it lope at idle when warm? |
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11-07-2008, 06:00 PM | #6 | |
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Re: 89 Corvette running issue
Was going to post something here, but decided that I have know idea what could be your problem accept to say I think it's possibly vacume related.
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