C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

C4 1988 In Ga. needs help....

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Old Apr 28, 2009 | 09:09 PM
  #1  
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Default C4 1988 In Ga. needs help....

Hello Everyone,

My 88 TPI L98 has 58,000 miles on it and something is causing it
to act weird from time to time. If I drive for any distance (1 mile or 100) and I cut it off then leave the window down or a door unlocked
it will crank but not take the gas. I then shut it off, crank it back up,
power windows up, shut it off and lock the doors and get out. Unlock the door crank it back up and runs fine. It's like she has to be treated a certain way...... Any ideas? Thoughts???

Thanks,
Randy
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Old Apr 28, 2009 | 09:20 PM
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sounds lie the vats is cutting off the fuel and ignition. You might see if someone has a vats bypass schematic, and make yourself a sneak circuit to bypass the vats and see if that fixes it.
What it sort of sounds like is a bad left door switch with the window pulling on the wires when it's down.
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Old Apr 28, 2009 | 09:21 PM
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sounds like anti theft system or something. I'm just 20 mi north of you in Acworth. Let me know if you need a hand.
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Old Apr 28, 2009 | 09:50 PM
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VATS might be it. Take a look under the steering column. See some wires run outside the colum and down? If you don't that would make it more likely the lock cylinder is the problem. Almost all the early VATS cars have had it replaced for similar problems.
If you get the schematic you can install a resistor and bypass the lock cylinder. The key has a resistor in it. Measure it with an ohm meter and get something close at radio shack.
Can't tell you any more. Mine had the cylinder replaced, the new one hasn't given any trouble, was replaced over 10yrs ago.
Do some searches I'm sure you'll find instructions.



JS
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Old Apr 28, 2009 | 11:10 PM
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What's the Security Light doing when it doesn't start?
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Old Apr 29, 2009 | 08:19 AM
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VATS kills the starter and fuel injection. It may be a VATS situation if someone has bypassed the starter enable relay.
http://members.shaw.ca/dankai/Vats%20Electrical.pdf
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Old Apr 29, 2009 | 09:55 AM
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Thanks for the offer. It's really nice that someone close by offered. I'm yet to meet anyone in this area that is a Vette guy. Thanks again.
Randy
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Old Apr 29, 2009 | 09:58 AM
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The car will always start (crank) but will not take the gas at times. It idles normal but when you press the gas you will not be able to go over 20mph.....
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Old Apr 29, 2009 | 12:48 PM
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So you are saying the car starts but you have no RPM's or the car won't crank until you do all that? then starts and is normal. If it starts I would not think it was a VAT's issue.
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Old Apr 29, 2009 | 01:02 PM
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Originally Posted by huntersdad14
Thanks for the offer. It's really nice that someone close by offered. I'm yet to meet anyone in this area that is a Vette guy. Thanks again.
Randy
There are a lot of us near you. I would also be glad to help you out if I knew more about the 1988s. Try peachstateposse.com or classicglass corvette club in Cobb County.
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