1991 Volkswagen Cabriolet "rough running" Questions

running rough. Any clue?? Check the hose between the inletmanifold and the pipe to the brakeservo it normally gets old and a crack in so the engine sucks false air on cylinder 4, causing engine to run

i am thinking about buying a 1990 cabriolet 5 speed but on start up it is really rough and then when it heats up it seems OK but doesn't go past 2000 rpm and at that runs really rough again the ...

running rough and loses power front right side of the engine just down from the head is a water outlet pipe that goes to the rad ,on this housing is two sensors ,now one of these is for the auto choke

I am trying to pull my 87 VW Cabriolet out of storage. Upon starting it ran really rough at an idle speed. But when you push the gas pedal down, it runs good at high idle. I gave it a tune up and an ...

...the battery, nleaving for an hour and reconnecting the battery. The engine will run quite rough until the ECU "learns" again. But this will depend on the type of ECU fitted to your

...rough and stalls again. After a couple minutes, I can start the car and runs without a problem. I have recently replaced the head gasket and I have had the coolant system checked. The oil is new and ...

...rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion ...

...running rough due to the coil going bad, but as soon as I replaced it the car would no longer fire. All holes checked out for spark. I pulled the fuel line at the rail and had good pressure but she ...

...My 1989 Cabriolet has a fuel delivery problem hat the mechanic can't figure out. He's been through everything obvious and not obvious he knows but the problem persist. The car will start, then ...

...running rough especially @ idle, also /pwr brake vaccum system works interrmitantly. normal pedal then hard pedal like theres no pwr assit anymore.....maybe all this is related to engine lite coming ...