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95 LT1 Fuel problem?

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Old 09-14-2018, 11:25 AM
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95 LT1 Fuel problem?

Alright just bought the car a few weeks ago and replaced the coil, I'm, and starter. It seems like every time I get gas my car doesn't wanna start for awhile after. I can hear the fuel pump. But it just cranks and won't turn over. Gotta wait a few mins every time my car turns off.
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Old 09-14-2018, 11:30 AM
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Re: 95 LT1 Fuel problem?

have you checked what your FP is?
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Old 09-14-2018, 11:33 AM
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Re: 95 LT1 Fuel problem?

Originally Posted by Chimera96 View Post
have you checked what your FP is?
Not yet was running good all week until I just got gas again. Just bought a test kit. I'll check what it is after work
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Old 09-14-2018, 12:20 PM
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Re: 95 LT1 Fuel problem?

I can get it started by pressing the pedal while cranking
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Old 09-14-2018, 02:49 PM
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Re: 95 LT1 Fuel problem?

Originally Posted by Treggk123 View Post
I can get it started by pressing the pedal while cranking
Holding the pedal on the floor while cranking puts the PCM in “clear flood” mode.
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Old 09-14-2018, 05:10 PM
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Re: 95 LT1 Fuel problem?

Originally Posted by Injuneer View Post


Holding the pedal on the floor while cranking puts the PCM in “clear flood” mode.
Is that a problem? Sorry just starting to learn about this car

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Old 09-14-2018, 06:24 PM
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Re: 95 LT1 Fuel problem?

If it starts quicker with the pedal on the floor, it may be indicating the engine is flooded.... example - leaking injectors. But the question remains why only on a new tank of gas? Do you tend to overfill the tank? That can cause problems with the carbon-filled fuel tank vapor collection system.

Checking the fuel pressure would be a good first step, as noted in an earlier post. Turn key to “run” (not “start”). Watch gauge to note peak fuel pressure when the pump stops priming (after about 2 seconds pump run time). Should be at least 40 PSI. Then watch to see how fast the pressure drops. Rapid pressure drop can cause extended cranking time.
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Old 09-15-2018, 12:43 PM
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Re: 95 LT1 Fuel problem?

Pressure was 43 and dropped to zero after a few secs. Its starting up today without having to press the gas. just rough


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Old 09-15-2018, 01:55 PM
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Re: 95 LT1 Fuel problem?

The pressure should hold, or drop slowly. Causes of rapid pressure loss:

1 - leaking check valve in fuel pump

2 - leaking injectors

3 - leaking fuel pressure regulator diaphragm

4 ​- fuel pressure regulator not closing off fully, allowing pressure to bleed off into return line

5 - leaks in fuel supply line, including flex pipe in tank

To check #2, pull rails up with injectors intact. Key to “run” to pressure fuel system, look for drips.

To check #3, look for wet fuel in the vacuum compensation line to the fuel pressure regulator.

#1, #4, #5 harder to diagnose. But #2 and #3 could cause a flooded condition.

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Old 09-19-2018, 08:51 AM
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Re: 95 LT1 Fuel problem?

Yeah it's one of those, my canisters totaly shot and even when you top it off the most that will happen is a check engine light but it doesn't effect anything else.
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Old 09-19-2018, 09:16 AM
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Re: 95 LT1 Fuel problem?

What code sets when you “top it off”? That would seem like a critical piece of information as to the cause of the problem.
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Old 09-19-2018, 09:23 AM
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Re: 95 LT1 Fuel problem?

P1441 evap emission system flow during non purge. I deleted it and stopped topping off till I get a canister installed and haven't had the issue except for smelling fuel.
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Old 09-19-2018, 09:25 AM
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Re: 95 LT1 Fuel problem?

I was basically dumping gas into the solenoid
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