What would cause car not to rev. up when press on the gas

Hello James,

If the engine revs up with no increase in speed, your clutch is slipping. Probably the reason the car was sold!

Alan.

My best bet would be:

Mass AirFlow Sensor
Wire leads (spark plugs right one?

Cheers
Ro.

I assume you have a clutch & it is slipping

That sounds like the the temperture sensor. that is what works the revs when the car is cold, is should be at the front of the engine. hope that helps

Could be a mass airflow sensor (MAF) or throttle position sensor. my guess would be the MAF, it went on my car and did the same thing.

If your car is fuel injection,try changing the cold start temp sender.

Sounds like censor issues. Have diagnostics run on the vehicle to find the culprit.

If it is low on gas the compressor will not engage. You can take one of the fill caps off and stick a pen in a press on the valve is gas escapes with pressure the system has gas. If not the system has to recharged and checked for leaks. You can check to see if the compressor is siezed by trying to turn the outer portion of the pulley by hand, if it turns the compressor is probably OK. (DON'T TRY THIS WITH THE ENGINE RUNNING)

it could be that your clutch/pressure plate/flywheel is maybe out of balance. i think thats about the only thing, if your engine seems fine.

i have problem vith car,my car is golf v 1.9 tdi motor code is BKC...number of code for problem is P0642 ("Sensor Reference Voltage "A" Circuit Low")