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Volvo Maintenance Hints for 7xx/9xx - Bill Garland's Nuclear ...

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Connectors<br />

Unexplained Driveability Problems: Rotten Battery Cables<br />

Unexplained Driveability Problems: Bad Voltage Regulator<br />

Car Runs but Won't Re-Start; Bad RPM Sensor<br />

Car Stalls When Brakes Applied: Vacuum Leak or FI Relay<br />

Car Stalls at RPM: FI Relay or Hall Sensor<br />

Rich-Running Problems:<br />

Rich Running Problems: General Diagnostic Notes<br />

Car Stalls; Bad FPR Likely Cause<br />

Car Stalls During Turn; Bad Fuel Pre-Pump Likely Cause<br />

Poor Per<strong>for</strong>mance; Rich Mixture Smell: Diagnostics; Faulty FPR<br />

Poor Perfomance, Bad Acceleration: Faulty FPR<br />

Engine Hesitation: Bad FPR<br />

Fuel in Oil: Faulty FPR or Injector<br />

Other Running Problems:<br />

Car Stalls Repeatedly on Startup: Fuel Pump Check Valve<br />

Car Stalls, Lights Die: Electrical Ground Fault<br />

Car Over-Revs RPMs While Under Acceleration<br />

LH-2 Cold Idle Problems -Bad ECT or O2 Sensor and Wiring Harness<br />

Notes

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