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

Fuel pump or injectors?

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Old Dec 9, 2008 | 04:02 PM
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Default Fuel pump or injectors?

1992 Shuts off after 15-20 mins wait a while and it will start and do the same thing,when it dies I smell gas.
Checks fuel rail and it seems to be sprayin out fine.
Any suggestions?
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Old Dec 9, 2008 | 04:39 PM
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< AIR > < FUEL > < SPARK >

If you are smelling gas, it sounds like your loosing your spark.

Check:
- Coil
- ICM (ICM's are known to be heat sensitive)

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Old Dec 9, 2008 | 05:15 PM
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You said it seems to have fuel at the rail, but I would start by driving around with a fuel pressure gauge taped to the windshield, so you can see fuel pressure when it dies.

If it has fuel (and it seems like it does), it is probably losing spark and the ICM is a very likely culprit. But it could also be an optispark (not nearly as likely but it happens).
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Old Dec 9, 2008 | 08:16 PM
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Any Check engine codes?
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Old Dec 9, 2008 | 09:27 PM
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just a thought
ignition coil when it gets hot. Check for spark when it dies. (make certain you aren't indoors to avoid igniting unburnt gas vapors).

Also, fuel pump often suffer intermittent failure before it Kaputs!
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Old Dec 10, 2008 | 03:35 AM
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Thanks I thought it was electrical too but I changed the fuel filter and the inside sounded like a baby rattle when i shook it,i put a new one on and everything is great..shew im relieved!
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Old Dec 11, 2008 | 12:13 PM
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If you can "sometimes hear" your fuel pump trying to run at ignition but then go press your fuel rail pressure release valve and a single drop comes out, does that prettymuch mean it is indeed your fuel pump?
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