5 psi, 25 oz fuel/minute fuel injection problem

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westwindwood2003@yahoo.com - 12 Aug 2007 20:44 GMT

I have a 2.8 liter fuel injected (throttle body?) 1996 Olds Cutlass
ciera that cranks, catches for a few seconds, quits. A fuel pressure
gauge shows about 5 psi, fuel pump delivers about 24 ounces of
gasoline per minute. Pump was replaced about 30,000 ago, fuel filter
done very recently. What do I do next?

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Scott Dorsey - 12 Aug 2007 22:38 GMT

>I have a 2.8 liter fuel injected (throttle body?) 1996 Olds Cutlass
>ciera that cranks, catches for a few seconds, quits. A fuel pressure
>gauge shows about 5 psi, fuel pump delivers about 24 ounces of
>gasoline per minute. Pump was replaced about 30,000 ago, fuel filter
>done very recently. What do I do next?

Pull the codes off the computer and see what it's saying when it shuts
the thing down.
--scott

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"C'est un Nagra. C'est suisse, et tres, tres precis."

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Hal - 12 Aug 2007 23:53 GMT

On Aug 12, 12:44 pm, westwindwood2...@yahoo.com wrote:

> I have a 2.8 liter fuel injected (throttle body?) 1996 Olds Cutlass
> ciera that cranks, catches for a few seconds, quits. A fuel pressure
> gauge shows about 5 psi, fuel pump delivers about 24 ounces of
> gasoline per minute. Pump was replaced about 30,000 ago, fuel filter
> done very recently. What do I do next?

5psi is too low, assuming your gauge is correct you probably have
another bad pump on your hands or a failed fuel pressure regulator.

Chris

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westwindwood2003@yahoo.com - 13 Aug 2007 00:42 GMT

> On Aug 12, 12:44 pm, westwindwood2...@yahoo.com wrote:
>
[quoted text clipped - 8 lines]
>
> Chris

I found a Chilton manual on fuel injection and ignition for 1984 to
1988, which said to pinch the return line to the fuel tank, and the
pressure guage should read 75psi. Well, still reads 5 psi. When I
press the valve on the side of the pressure guage to relieve the
pressure, the flow is certainly not in the 25 to 45 psi range.
Although, to be safe, I suppose I should try the guage out on a car
that is running to see if the guage is accurate. One thing that is
odd is when I relieve the pressure with the button on the side of the
pressure guage, a good 3 ounces flows into the can and that seem odd
for such a low pressure. If there is an accumulator, I would think it
would not work at low pressure.

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Scott Dorsey - 13 Aug 2007 02:29 GMT

>I found a Chilton manual on fuel injection and ignition for 1984 to
>1988, which said to pinch the return line to the fuel tank, and the
>pressure guage should read 75psi. Well, still reads 5 psi. When I
>press the valve on the side of the pressure guage to relieve the
>pressure, the flow is certainly not in the 25 to 45 psi range.

Your fuel pump is not good.

If blocking the return line does not at least _change_ the pressure, it
means the incoming pressure is below the level the regulator is set to.

>Although, to be safe, I suppose I should try the guage out on a car
>that is running to see if the guage is accurate. One thing that is
>odd is when I relieve the pressure with the button on the side of the
>pressure guage, a good 3 ounces flows into the can and that seem odd
>for such a low pressure. If there is an accumulator, I would think it
>would not work at low pressure.

Fit the gauge to a tire fitting, and connect it to a tire that has a known
air pressure inside. Does it read anything close to correct?
--scott

Signature

"C'est un Nagra. C'est suisse, et tres, tres precis."

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westwindwood2003@yahoo.com - 13 Aug 2007 03:24 GMT

> <westwindwood2...@yahoo.com> wrote:
> >I found a Chilton manual on fuel injection and ignition for 1984 to
[quoted text clipped - 20 lines]
> --
> "C'est un Nagra. C'est suisse, et tres, tres precis."

OK, just went and put the gauge on a tire and it read 32 psi. On this
car the gas tank has to come out to replace the pump. I once had a
mechanic tell me that getting gasoline on a light bulb can break the
bulb from the cold of the gas evaporating and start a fire while
pulling a fuel tank. Will do the job outside with no light bulb.

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