1997 Pontiac Grand Am "2 vacuum system" Questions

...vacuum circuits ? here is a factory diagnostic flow chart for what to test. HVAC Air Delivery System Check Step Action Yes No 1 Start the engine. Turn the blower motor fan ON and select an air outlet ...

...vacuum hose hooked to it is this the fuel pressure regualator? P0442 Evaporative Emission Control System Leak Detected (small leak) P0440 Evaporative Emission Control System Malfunction my grand am ...

...Cylinder Misfire Detected check for vacuum leaks check fuel for contamination or water check fuel pressure the other 2 codes could be related to these 2 codes and are manufacturer specific ...

vacuum leaks affecting MASS AIR sensor. Cars run in "open loop" when cold. There is no sensor data used to run the car or adjust fuel, and to help with warmup they often run rich while cold. Once they

...2 IS BELOW THE CATALYTIC CONVERTER. P0171 SHOULD GO AWAY WITH A GOOD O2 SENSOR BUT DO CHECK FOR VACUUM LEAKS TO BE SURE. 3.1/3.4L ENGINES HAVE A BAD DESIGN INTAKE MANIFOLD GASKET, THE LEAK OIL, ...

...vacuum pump operating for at least 2 hours (longer in cold weather) before new refrigerant is added .. you can test for leaks by observing if it can hold a vacuum for 15 min or so without dropping .. ...

...2 indicates oppisite side of No.1 cylinder. Hope this helps It should have 4 but why are you replacing them? Bad idea cause they rarely go bad. there are other problems that create o2 codes. Tune-up ...

...vacuum leak. First, to close the book on the fuel system, turn your key to the run position a few times. Do not turn the engine over, just turn the key on until you hear a clicking sound under the ...

...vacuum leak, oil leak, coolant leak or a combination of any of the before mentioned....hope this helps, Your Engine has a upper and lower intakes the 3100(3.1L) and the 3400(3.4L) engines both had ...

...2" tall, it has a fuel line connected at the bottom and a much smaller line coming out of the top, what is this? it seems to be leaking fuel. To better position this item, from the front of the car ...