Engine Performance problem
2000 Other Volkswagen Models 4 cyl Two Wheel Drive Manual 80000 miles
My daughter has a 2000 VW Cabrio with a 2.0 L engine and a manual transmission. I recently replaced the coil on this motor. Some time after, she told me that she was losing power while driving and had to pull the car over. I tried to get it running on the side of the road, but the engine would run extremely rough when RPMS > 2000. So, I had the car towed to my home.
I checked the codes that day and got a PO102 code and PO134 code. The PO102 indicates low voltage on the MAF and the PO134 indicates a bad O2 sensor in bank 1. I decided to clear the codes to see if they would come back. I cranked the car and let it run for awhile. I then increased the RPMS and at about 2000 RPM, the motor ran rough again until the RPMS went back down to idle. Sometimes it would run rough at idle after having brought the RPMS up to 2000 and then return to idle.
The PO102 code did come back immediately after the first warm up cycle. I am waiting to do further warm up cycles to see if the PO134 code comes back.
I understand that, among other things, I am faced with these possible sources of the problem.
Bad O2 Sensor
Possible bad MAF sensor or MAP sensor?
At least, that is what I am getting from my self-education on various forums. I do understand that bad MAF and bad O2 sensors are common on these Carbios. However, I am worried about buying the wrong part as each of these parts is somewhat expensive.
Can someone give me some advice here? Is there some way that I can narrow down my search to find the exact source of the problem? Mind you, I am a back yard mechanic with a Haynes manual. I can turn a wrench, replace parts, etc, but am not very good diagnostically.
have the same problem?
Wednesday, July 2nd, 2008 AT 10:46 AM