Have a jetta that will stall at stops but run really good otherwise, it also doesnt wanna stay runnin once ya put it in gear, but when ya do get it going it runs fine untill ya come to a stop, then it dies or seems like its struggling to stay runnin, already tried a new O2 sensor, am currently a student for auto mechanics, im going for an AAS certification, id really appreciate any and help you can provide me... thank you kindly Mr. edward Harrington
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SOUNDS LIKE THE TORQUE-CONVERTER WHICH ALLOWS THE CAR TO BE IN GEAR AT A RED LIGHT OR STOP SIGN AND NOT STALL. IF YOU HEAR A RATTLING TRY TO FIND OUT IF IT IS COMING FROM THE EXHAUST PIPE OR THE TRANSMISSION. OR IT COULD BE A CLOGGED CATALYTIC CONVERTER. I HOPE IT IS THE LESSER EXPENSIVE OF THE TWO. THANKS FOR USING FIX-YA. PLEASE KEEP ME POSTED
IT COULD BE THE POWER STEERING PUMP LOCKING UP AND STALLING THE ENGINE. CHECK TO SEE WHICH ONE OF THE PULLEYS IS NOT MOVING AS FAST AS THE OTHERS ON THE PASSENGER SIDE OF THE MOTOR.(WHILE IT'S RUNNING) IT COULD JUST BE AN IDLER PULLEY. I HOPE THIS HELPS TO FIND THE CAUSE OF THE BELT FAILURE. PLEASE KEEP ME POSTED. THANKS FOR USING FIX-YA AND FOR AN HONEST RATING. GOOD LUCK
Is the check engine light on? If so I would have a scanner put on it and have the codes read.. Otherwise it may be hard to determine. It may be the vacuum actuator on the tranny. It would be good idea to have fuel pressure checked and also any vacuum hoses.
Did you check the timing? Also make sure the injectors are putting out the correct amount of fuel. By oxygen sensor I'm assuming you replaced the MAF (mass air flow) sensor? Are all the vacuum lines in good shape and is the EGR vavlve actuating correctly (they can get gunked up)? Is air getting into the fuel lines somewhere? Is the engine not getting enough air when the turbo isn't on? Maybe your intake is clogged up but this isn't extremely likely since you'd notice power loss at higher speeds. What was done recently to the vehicle that might have caused this?