Mechanics

MY CAR RUNS FINE UNTIL I'VE DROVE IT FOR ABOUT 40 MINUTES. THEN IS BUCKS AND SOMETIMES BACKFIRES. IT ALSO SOMETIMES DIES.

1996 Volkswagen Golf • 160,000 miles

If it dies, it will fire right back up, but will continue to do it until it has had time to cool down. If I sit at an idle, it will get to about 2000 RPM, them it will misfire. Also when it happens, it will not accelerate like it is losing fuel pressure, it will not rev up for about 30 seconds. I've replaced the plugs and wires, distributor and rotor button. The gas mileage has not been affected however, which leads me to think that is something to do with vacuum. Could it be bad 02 sensor?
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Theoldviolin
September 2, 2011.



http://www.2carpros.com/articles/engine-hesitates

Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.

Rasmataz
Sep 2, 2011.


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