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

C4 Vette owner needs help

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Old Aug 2, 2012 | 06:08 PM
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Massimo D'Alessandro's Avatar
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Default C4 Vette owner needs help

Well first off i am a corvette lover, i have a 78 silver anniversary and a 87 vette. Always loved them but my most recent purchase is a 89 GTA with a 350 TPI. And of course it wont run, i have already replaced all the injectors, TPS, MAF, and a New ECM and Factory stock prom. The car will just crank over and not fire. I have a snap on vantage scanner and a normal scanner, using the vantage i checked for injector pulse and using the normal scanner i checked for codes. There where no codes and the vantage scanner came up showing an injector pulse so i know its not vats. What else can i do i am at my whits end with this thing. And i know its not a vette but its almost the same motor, Please help me!

Last edited by Massimo D'Alessandro; Aug 2, 2012 at 06:12 PM.
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Old Aug 2, 2012 | 07:02 PM
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leesvet
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Have you checked fuel pressure? Spark?

basics first. 40 psi fuel at key on, 38 at idle.

If its like a vette it should run the fuel pump 2 seconds at key ON until it fires and runs to initiate the pump run.
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Old Aug 2, 2012 | 07:15 PM
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Well, you have an 87, start swapping parts since they are the same. By the time you figure it out, your 87 will actually be an 89
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Old Aug 2, 2012 | 08:25 PM
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Ill Check fuel pressure tomorrow i hope it was that simple
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Old Aug 2, 2012 | 08:28 PM
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Originally Posted by leesvet
Have you checked fuel pressure? Spark?

basics first. 40 psi fuel at key on, 38 at idle.

If its like a vette it should run the fuel pump 2 seconds at key ON until it fires and runs to initiate the pump run.
I hope it is that easy, the problem is it wont idle, because it wont turn on
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