Mechanics

OLDSMOBILE 98 FUEL PUMP PROBLEM

1995 Oldsmobile 98 • 18,600 miles

I have an error code P1640 Quad Driver Module 1 and a P1670 Quad Driver Module. They started late summer after the AC Cluch seized up. So far I have replaced the EGR Valve (cleaned the bypass pipe) and the Transmission shift solenoids. I was told it could be the fuel pump because of the pressure on fuel rail is reading 40 PSI. Could it be the fuel pump? If not what could it be? PLEASE HELP!

Thank you.
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Guest
January 6, 2013.



For 1640 check fan fuse and cruise control fuse first. Same for codes 1670 otherwise have apro check this out as it mayb be something really involved.

Hmac300
Jan 6, 2013.
Fule pressure should be 41-47 psi with key on and engine not running. It should hold pressure of +-5 psi after shutdown but could be pump or filter.
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Hmac300
Jan 6, 2013.

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