Mechanics

STALLS AND HESITATES AFTER WARM UP

1990 Volkswagen Rabbit

Engine Performance problem
1990 Volkswagen Rabbit 4 cyl Front Wheel Drive Automatic 213000 miles

Engine runs fine till it gets up to full operating temp. Then it starts to bog down and black smoke starts to come out of exhaust. I can unplug the fuel pressure valve along with the temprature sensor (the blue sensor) and the car runs fine. I plug either one back in and it will die. I have replaced fuel pump, fuel filter, blue temp. Sensor, checked for vacuum leaks. Any ideas would be appreciated.
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Lfergu
October 14, 2009.



You will need to vacuum pump on the fuel pressure regulator take it up to about 13 and see how the engine runs you may have a bad regulator or a vacuum leak at the booster

Dr Loot
Feb 12, 2010.


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