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CheezX
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Joined: 16 Jan 2004
Posts: 90
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 Posted: Fri Sep 01, 2006 11:17 am Post subject: |
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| Twilightoptics wrote: | Oil pressure switch is supposed to shut the fueling OFF when there is no oil pressure in the event of an accident.
IIRC under wiring diagrams, when the key is at "start" it runs through a different piece of the circuit that allows fuel when the oil pressure isn't there. |
Actually it's just a backup circuit to get power to the pump in case the relay fails. If oil pressure hits zero the engine still runs as the relay will keep the pump operating. Maybe it's different on pre-90 cars, but that's how 90-92 is. |
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CheezX
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Joined: 16 Jan 2004
Posts: 90
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| Posted: Fri Sep 01, 2006 11:21 am Post subject: |
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| Dewey316 wrote: | The Dan's...
All signs are pointing to the pulsator. Looks like the tank is coming back out this weekend, and I will be replacing the pulsator. I will probably just go with high-pressure rubber fuel line, and real hose clamps.
I sure hope that fixes it. I really don't want to be taking the fuel tank out of the car for a third time!!!
--john |
Definitely keep a pulsator in the system, this will help with a smoother idle and better gas milage. If you look at the tuning side of it, less BLM, INT variation. The pulses will make more difference when injector pulse width is short. |
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Dewey316
The Lama
Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech
1990 Chevrolet Camaro RS
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| Posted: Fri Sep 01, 2006 11:35 am Post subject: |
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| CheezX wrote: | | Actually it's just a backup circuit to get power to the pump in case the relay fails. If oil pressure hits zero the engine still runs as the relay will keep the pump operating. Maybe it's different on pre-90 cars, but that's how 90-92 is. |
We know schultzy's car ran without oil presssure. |
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CheezX
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Joined: 16 Jan 2004
Posts: 90
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| Posted: Fri Sep 01, 2006 11:53 am Post subject: |
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Mine does too.  |
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Dewey316
The Lama
Joined: 08 Jan 2004
Posts: 7295
Location: Bringing the tech
1990 Chevrolet Camaro RS
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| Posted: Fri Sep 01, 2006 11:57 am Post subject: |
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I know mine will to, every now and again, if I really toss my car hard into a right hander, my pressure will drop to zero. Car still runs.
I really need to get one of them wicked cool Canton road-race oil pans. |
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iansane
Member
Joined: 16 Jan 2004
Posts: 5740
Location: Bothell
1991 Pontiac Trans Am
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| Posted: Fri Sep 01, 2006 8:55 pm Post subject: |
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| Twilightoptics wrote: | Oil pressure switch is supposed to shut the fueling OFF when there is no oil pressure in the event of an accident.
IIRC under wiring diagrams, when the key is at "start" it runs through a different piece of the circuit that allows fuel when the oil pressure isn't there. |
...Not so much. My stock sensor isn't even connected to the vehicle at this point. The connector is ziptied back away from the block.
As for the start thing, mine starts without the key having to go all the way to "start."
Is the pulsator the section of tubing between the pump and the top of the tank? |
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Twilightoptics
Hardcore (12sec Club)
Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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| Posted: Fri Sep 01, 2006 9:02 pm Post subject: |
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My car wouldn't maintain the fuel if it was unplugged.
Maybe a maf thing? |
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iansane
Member
Joined: 16 Jan 2004
Posts: 5740
Location: Bothell
1991 Pontiac Trans Am
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| Posted: Fri Sep 01, 2006 9:55 pm Post subject: |
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| Twilightoptics wrote: | | Maybe a maf thing? |
Could very well be. |
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