LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

new opti, have spark and fuel

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Old 02-02-2016, 07:19 PM
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Re: new opti, have spark and fuel

It starts if I try like 30 times
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Old 02-02-2016, 07:26 PM
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Re: new opti, have spark and fuel

Originally Posted by black96camar
It starts if I try like 30 times
Clearly not the VATS.

I guess I'd suggest you go back to the basics and start checking everything. Pull each plug and look them over well. Measure compression while the plugs are out. Check that each plug wire makes a spark when the engine is turned over. Make sure there are no restrictions in the intake system. Borrowmormrent a mood light and confirm the injectors are working. Gather as much data as possible and post it up...we'll all try to help....
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Old 02-02-2016, 07:38 PM
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Re: new opti, have spark and fuel

Thanks I'll do it in couple weeks gonna be gone till end the month
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Old 02-02-2016, 09:19 PM
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Re: new opti, have spark and fuel

The pressure should drop when engine vacuum is present, typically to 32-35 psi.

One thought, and Shoebox covers it in his write up.... if the PCM does not receive the fuel enable signal from the BCM the engine may start, but will stop after a few seconds when the prime fuel is gone. But as Rob points out you would have code P1626.
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Old 02-09-2016, 06:10 PM
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Re: new opti, have spark and fuel

To check the codes the car has to be running
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Old 02-09-2016, 06:38 PM
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Re: new opti, have spark and fuel

Originally Posted by black96camar
To check the codes the car has to be running
No. Some codes are stored in the non-volative memory and you can read them with the key on but the engine off. Try it and see...
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Old 02-09-2016, 07:30 PM
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Re: new opti, have spark and fuel

I have didn't get any codes, what can I do to see if it is code p1626
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Old 02-11-2016, 10:59 AM
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Re: new opti, have spark and fuel

I've decided to take the car to a shop, I don't have the time or a place to work on it
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