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I assume the pump was replaced because it was getting power but no fuel pressure ? Are you still not getting fuel pressure ? Spark to the plugs ? Normal compression when cranking the engine ? Security light not staying on ?
CHECK FOR SPARK AND FUEL.IF ALL IS GOOD A BAD COLD START VALVE WILL CAUSE COLD ENGINE START UP PROBLEMS COLD START VALVE DOES SAME JOB AS ENGINE COOLANT TEMPERATURE SENSOR IT ENRICHEN FUEL SYSTEM FOR COLD START UPS. DO LITTLE TUNE UP MAKE SURE SPARK PLUGS AND WIRES GOOD, REPLACE DISTRIBUTOR CAP AND ROTOR,CHECK IGNITION TIMING, REPLACE AIR FILTER AND FUEL FILTER. IF CAR GETTING FUEL AND SPARK.CAR TIMING BELT COULD HAVE JUMP TIMING IF TIMING BELT NEVER BEEN SERVICED OR REPLACED.
ok, i tell you 3 possible causes.
check maf sensor connection , check fuel pressure regulator (max press fuel in rail 40 psi) , check engine compression (min 95 psi ) if less this cause spark plugs wet and not start
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