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azaps4890 11-29-2012 07:53 PM

P0313 after prolonged idle
I know that this subject was probably already discussed somewhere, but never found a remedy for my specific issue.
Everything is fine, until car sits and idles for a few minutes. Engine will start running rough and check engine light comes on. I would turn it off and back on - runs just fine.
Already checked DISA, cleaned idle valve and whole intake, replaced iffy hoses and rubber.
New fuel filter as well. Car has 105K miles. Can it be an old fuel pump?

edjack 11-29-2012 09:19 PM

Get a fuel pressure gauge and observe the pressure when it occurs. You have a Schrader valve on the fuel rail which makes it easy to attach a gauge.

Get thee to Harbor Freight and buy the kit. Pressure s/b 50 psi+.

azaps4890 11-30-2012 12:39 PM

Thanks. I'll try that.
What baffles me is, that if it's a fuel pump - then the problems should appear when the demand is high (high RPM) versus low (idle).

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