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91 z28 tpi starts and dies quickly

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Old Jan 3, 2024 | 07:22 PM
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91 z28 tpi starts and dies quickly

I replaced, pump, sending unit and filter. Car starts but won’t stay running. I turn key and security light turns off so I don’t think it’s vats. Any ideas?
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Old Jan 3, 2024 | 07:29 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 91 z28 tpi starts and dies quickly

Fuel pressure tested ? Original multec injectors ?
does it continue to run off starting fluid ?
injector pulse tested with a noid light ?
hot spark ? Has the car sat for along time?
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Old Jan 3, 2024 | 08:38 PM
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Re: 91 z28 tpi starts and dies quickly

[QUOTE=Tuned Performance;6521138]Fuel pressure tested ? Original multec injectors ?
does it continue to run off starting fluid ?
injector pulse tested with a noid light ?
hot spark ? Has the car sat for along time?[/QU]
it runs off starting fluid, I haven’t tested with a noid light. I’ll need to buy one of those. Not sure if original injectors.
it clearly sat for a long time

Last edited by tuned out; Jan 3, 2024 at 08:41 PM.
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Old Jan 3, 2024 | 08:42 PM
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 91 z28 tpi starts and dies quickly

Even though fuel pump is new it could be tbi low pressure. Might wrong not defective .double check it.
if fuel pressure and injector pulse with a noid light. Contact southbay fuel injectors for a set of injectors. Stock grey body injectors fail over time with coil shorting. If the car has sat for years injectors stick shut.
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Old Jan 3, 2024 | 08:53 PM
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Re: 91 z28 tpi starts and dies quickly

Originally Posted by Tuned Performance
Even though fuel pump is new it could be tbi low pressure. Might wrong not defective .double check it.
if fuel pressure and injector pulse with a noid light. Contact southbay fuel injectors for a set of injectors. Stock grey body injectors fail over time with coil shorting. If the car has sat for years injectors stick shut.
thank you
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