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Old 02-11-2013, 06:06 PM
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check engine is now working, but not throwing any codes. I took it down to the shop and they tell me everything is testing well except fuel pump. They say fuel pump pressure is 40-50 and should be 55+.

He says we must replace the fuel pump. It does not make sense to me this would cause the problem. According to him inadequate fuel pressure will throw off the ECM and would be the problem.

I dropped about $300 on a delphi fuel pump.

Any thoughts?

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Old 02-11-2013, 06:14 PM
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Just some house cleaning.. The check engine system worked. I had it checked at Oreillys and they told me it did not. Sorry for throwing the thread off.

Also, there are no drivability issues other than the one mentioned. After it warms up, it runs like a top!
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Old 02-11-2013, 06:26 PM
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Did you check the fuel pressure regulator. Unplug the vacuum line on it and make sure it is not full of fuel. You can also try pinching off the erturn line to see if the pressure goes up. I would not install a pump unless you are sure. It is an expensive guess.
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Old 02-11-2013, 06:36 PM
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I took the shops word for it. I guess we will see. My tinkering is with older cars and am a real novice when it comes to anything after about oh 1978!

would low fuel pressure account for a bouncing idle at start up? I would think if it was the fuel pump it would happen in and out of gear. MIne only has problems in gear at idle when it is cold
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