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post #1 of 5 (permalink) Old 10-07-2017, 12:27 PM Thread Starter
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Slow Fuel Pressure After Replacing Pump

Hello,

I replaced my fuel pump after getting the characteristic gas smell and hard starting associated with the chevy fuel pump recall. I noted that the plastic fuel lines were cracked and leaking fuel. At the end of the job I forgot to put gas in the tank and was trying start it (long day of work). Finally realized there was no gas and filled the tank up. I worked well for a few weeks, then it was hard starting and getting worse. Now you can hear the fuel pump come on and then turn off but reading the pressure while doing this shows it does not build pressure until it starts cranking (and it is slow at that). After it gets up to pressure it starts and runs without a problem, but shut it off and the pressure drains out quickly. It will only maintain about 8 psi seconds after you shut the car off. I took a video of the fuel pressure gauge attached to the schrader valve at the fuel rail.


Would appreciate any input
Thanks
Will
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post #2 of 5 (permalink) Old 10-07-2017, 01:59 PM
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Looks like you got a bad pump. Any codes?

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post #3 of 5 (permalink) Old 10-08-2017, 11:41 AM Thread Starter
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Quote:
Originally Posted by Coby7 View Post
Looks like you got a bad pump. Any codes?
No check engine codes at all.
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post #4 of 5 (permalink) Old 10-08-2017, 01:01 PM
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New doesn't mean good, even if warrantied you are still going to have to drop the tank. Bummer, I hate doing stuff twice.

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post #5 of 5 (permalink) Old 11-06-2017, 07:01 AM Thread Starter
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So I have been having what I think are issues with ordering new fuel pumps for my cobalt. I ordered another one and it came with the circuit for the fuel gauge exposed. There was no cover. Is this normal? Does being submerged into gas affect this?

I went to order another one on rock auto and the picture indicates the same thing. There is no cover on the fuel gauge circuitry

2007 CHEVROLET COBALT 2.2L L4 Fuel Pump & Housing Assembly | RockAuto

Would appreciate any information

Will
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