New fuel pump & filter, crank without start
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New fuel pump & filter, crank without start
Hi guys ,
I have this 91 TPI bird was parked for long time, sparks changed 6 months ago , now new fuel pump and filter was installed with same issue, car start fine after three cranks , woke up next day and only crank without start AGAIN..
Thank you..
I have this 91 TPI bird was parked for long time, sparks changed 6 months ago , now new fuel pump and filter was installed with same issue, car start fine after three cranks , woke up next day and only crank without start AGAIN..
Thank you..
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: New fuel pump & filter, crank without start
Do you have spark ?
Injector pulse ?
What’s the fuel pressure at ?
Injector pulse ?
What’s the fuel pressure at ?
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: New fuel pump & filter, crank without start
Until you know what’s missing you can’t diagnose . Unless you want to throw parts at it.
Thread Starter
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Joined: Oct 2017
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Re: New fuel pump & filter, crank without start
OK, this is update for the same issue >>
I just parked IT for couple hours and when I come to crank , it starts and for about 3 seconds and died, tried to crank many times again but it wont start , I had to toe it to my place.
Note : I parked in a slope , fuel tank was half full .. any thoughts . Thanks
I just parked IT for couple hours and when I come to crank , it starts and for about 3 seconds and died, tried to crank many times again but it wont start , I had to toe it to my place.
Note : I parked in a slope , fuel tank was half full .. any thoughts . Thanks
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: New fuel pump & filter, crank without start
You have to be missing something, fuel pressure, injector pulse, spark.
bad injectors (multecs).
bad injectors (multecs).
Thread Starter
Junior Member
Joined: Oct 2017
Posts: 27
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Re: New fuel pump & filter, crank without start
OK just checked ,
Switch on , and there are no any pressure or fuel comes out of the fuel rail valve ? I tried to put my ear right next to the fuel tank access hole area and I was barely can hear the pump kick in with switch start .. I'm confused between a bad fuel pump or fuel pump bad relay , I don't know even where is that last thing exact location is
Why is this keep coming every time , car became possessed every time I parked it on slope , low driver side
Switch on , and there are no any pressure or fuel comes out of the fuel rail valve ? I tried to put my ear right next to the fuel tank access hole area and I was barely can hear the pump kick in with switch start .. I'm confused between a bad fuel pump or fuel pump bad relay , I don't know even where is that last thing exact location is
Why is this keep coming every time , car became possessed every time I parked it on slope , low driver side
Last edited by faisal; Nov 11, 2018 at 01:17 AM.
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Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: New fuel pump & filter, crank without start
Did you install the pulsator inline on top of the pump ?
you can bypass the relay by jumping the oil pressure switch.
sounds like you have a bad pump or it’s shooting out of the pulsator.
even though the pulsator job is to isolate the pump from the hardline to reduce pump noise in the line. I always put a hose in its place. They are known for leaking especially when removed and reinstalled.
you can bypass the relay by jumping the oil pressure switch.
sounds like you have a bad pump or it’s shooting out of the pulsator.
even though the pulsator job is to isolate the pump from the hardline to reduce pump noise in the line. I always put a hose in its place. They are known for leaking especially when removed and reinstalled.
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: New fuel pump & filter, crank without start
Post 3 shows the ops gray wire to the orange wire. Some relays have a red lead to bypass the relay.
https://www.thirdgen.org/forums/tpi/...fuel-pump.html
yhe ops or oil pressure switch is backup Incase the relay fails. It closes when cranking the engine and 4psi is reached.
when you turn your key to the on position the ecm controls the relay for a 2 second prime.
https://www.thirdgen.org/forums/tpi/...fuel-pump.html
yhe ops or oil pressure switch is backup Incase the relay fails. It closes when cranking the engine and 4psi is reached.
when you turn your key to the on position the ecm controls the relay for a 2 second prime.
Last edited by Tuned Performance; Nov 11, 2018 at 10:50 AM.
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From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
Re: New fuel pump & filter, crank without start
First question would be is how much fuel you have in it?
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