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Registered User
Join Date: Sep 2009
Posts: 4
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1983 928S fuel pump
Hi guys, I was looking for a little feedback. I bought the car a few months ago and there has been a few little issues but the one I can't figure out is when I start the car everything is fine and then maybe ten, fifteen minutes later sometimes longer when I come to a stop or am off throttle the engine rpm drops and rises over and over and if I give it just a little gas it runs perfect I changed the filter first and checked the fuel pressure and its good but that doesn't mean that it's not losing pressure I just don't have a gauge inside the car. I have changed the O2 sensor as well but I suspect the fuel pump. I was thinking maybe I have overlooked something so before I buy the pump I thought I might get some expert advice here. Thanks for any input.
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11-17-2009, 07:21 PM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 5,768
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Fuel pumps don't have idle issues.
Is it a US 83? I suspect; switches on the throttle for idle and wot are not working or adjusted correctly. vacuum leaks or incorrect routing. components failed in vacuum system. |
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11-18-2009, 01:13 AM
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Registered User
Join Date: Sep 2009
Posts: 4
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Yes it is a US spec 928s
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11-23-2009, 07:11 AM
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