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

Engine problems 89 vette L98

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Old Jun 8, 2010 | 09:58 PM
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Default Engine problems 89 vette L98

Hey guys i have a 1989 vette with L98 tpi motor and I recently started having problems with my engine. Sometimes when i floor my car and get some tire spin the motor just cuts of as if im not getting enough fuel or something? and when I let up on the gas it goes back to normal? Can anyone help me out here? Its completely stock.
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Old Jun 8, 2010 | 10:02 PM
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Originally Posted by 89 corvette
Hey guys i have a 1989 vette with L98 tpi motor and I recently started having problems with my engine. Sometimes when i floor my car and get some tire spin the motor just cuts of as if im not getting enough fuel or something? and when I let up on the gas it goes back to normal? Can anyone help me out here? Its completely stock.
Any codes? Just htinking out loud here but

- Fuel filter
- Furl injectors

Does it only happen when tires spinning???
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Old Jun 8, 2010 | 10:11 PM
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i changed my fuel filter about 4 thousand miles ago and my check engine light is on because my car is now running rich? Fuel injectors is what i thought also but i want to get some other opinions?
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Old Jun 8, 2010 | 10:16 PM
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Performance chip with a rev limiter?
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Old Jun 8, 2010 | 10:20 PM
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Its all stock nothing like that. So do you guys think i should just goahead and change my injecotrs?
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Old Jun 9, 2010 | 12:07 AM
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how much gas is in the car? They are notorious for cutting out when the pump starves at half tank or less especcially sliding on corners.

when is last time you changed the filter on the pump itself
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Old Jun 9, 2010 | 02:28 AM
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Yea exzactly when I have a little under half tank and I slide in corners it cuts off...so that normal with C4? so is there any way to fix that or will I just have to make sure I have a half tank or more to eliminate this problem? I changed my fuel pump and the strainer about 5 years ago.
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Old Jun 9, 2010 | 06:21 AM
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ohm fuel injectors first , quick and easy
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Old Jun 9, 2010 | 04:10 PM
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Does the car stall?
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Old Jun 9, 2010 | 05:04 PM
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the car does not stall just cuts off for a little and as soon as i let up on the gas its fine and i step on it again to make sure and its all back to normal. Do you guys have any recomm on which type of fuel injectors, remember im fully stock but i do want to enhance the performance on my vette.
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Old Jun 10, 2010 | 11:44 AM
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This is not likely an injector problem. Don't just throw parts at it. You could start by getting a fuel pressure gauge and taping it to you windshield. See what is happening when/if you can duplicate the problem.
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Old Jun 10, 2010 | 12:03 PM
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Originally Posted by BADDUCK
This is not likely an injector problem. Don't just throw parts at it. You could start by getting a fuel pressure gauge and taping it to you windshield. See what is happening when/if you can duplicate the problem.


Does the car have the problem at all with a full tank?
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Old Jun 10, 2010 | 01:51 PM
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Ill try the fuel pressure gauge. The problem does not occur if I have half tank or more.
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Old Jun 10, 2010 | 07:42 PM
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Originally Posted by 89 corvette
Ill try the fuel pressure gauge. The problem does not occur if I have half tank or more.
You've probably just answered it then...

But yeah, BadDuck is right, a F/P gauge is an essential piece of equipment for us guys...
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Old Jun 11, 2010 | 02:54 AM
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Thanks alot guys, You guys are all great help.
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