1999 Volkswagen Passat "air pump running" Questions

...Air Pump Motor (V101), by pressing buttons on hose connector. See Fig. 33 . Using scan tool, check Secondary Air Pump Motor (V101) in scan tool Output Diagnostic Test Mode (Secondary Air Pump Relay ...

...pump it fires but wont run , no air in fuel all checked and ok alla vacumme pipes checked or replaced i have 2 keys for my passat.with 1 key the engine runs perfect and with the other key the engine ...

...air pump... it basically pumps fresh air into the exhaust to help thin out the emissions, it usually only runs when cold. Do you have an engine light? They can go bad... but the humming is probably ...

while, quiet loud, car running fine It's very likely that you need to replace the fuel pump. Usually, if its that loud either its sucking air (because you're out of gas) or the pump is about to go out

...your air pump is malfunctioning. It is used to pump emissions out the back of the car. it is controlled by a vacuum. These will drain your battery if the vacuum does not send a signal to shut it

...pump and fuel injectors. 2. Spark - Make sure your system has electrical current to fire the plugs. Check your wires to the coil(s) the plug wires, cap & rotor and spark plugs and gaps. 3. Air - ...

...pump cannot rotate as the air cond is belt driven on every auto that i know of. now if the belt is slipping it is a cause of one of two things. belt is stretched or not tensioned properly, or the air ...

...air temps, yes/no. rules complex. avoid prime pump tests. (savvy?) some new bosch pumps are 100% silent so noise tests are not good now, use use cranking PSI pressure only if wise. and hate taking a ...

...Air pump not kicking on. i've tested the pump it works fine. then i tested for voltage to the pump, there was none. then i checked the wiring between the air pump relay and the pump it was ...

...pump works,fuel up to fuel rail, spark plugs do fire Improper fuel/air mixture, possibly plugged up air filter? You have 2 out of 3 of the needed components for that motor to run, and assuming your ...