Audi Repair Questions? Ask a Mechanic for Answers ASAP
Can you direct me to a video or literature on the process, especially as it relates to the angle. I am mechanically inclined, a tinkerer, a jack-of-all, but lost under the hood of the Audi A4.
Also, I was suspecting something wrong with the transmission: ATF levels, torque convertor issues, etc. Was I mistaken? Do these codes tell you something is wrong elsewhere (i.e. throttle body)?
OK, I both cleaned the throttle body and aligned it today. It was a little gunky, and cleaning it may have improved responsiveness and idling minimally; however, the problem still persists. If I accelerate up a 5-10 degree incline, and tiptronic's in drive and in 5th and going about 40mph, the car makes a strange variance in rpm from about 1600 to1450 back and forth as long as I am pressing the gas pedal to sufficiently maintain 40mph up the hill. Also, as I start up a 20 degree hill from a stop, if I accelerate pretty hard (not pedal-to-the-medal hard, but an aggressive acceleration nonetheless) by the time I approach 20-30 mph, I feel a strange rumbling feeling (like I described earlier) that will stop as soon as I stop accelerating. I cleared the other DTCs, and I haven't driven it enough to trigger any more DTCs. What's next?
I remember checking the transmission (02) for DTC when the CEL was on the other night, it said none were present. Could the cats be causing this? The car has 116000 miles on it, and it is the v6 3.0L.
no the cats fail over time.
Continue to drive and re check again in another day. The dtc will log again once the TCM notices there is a fault. Also the check the ABS module for a logged fault.
Check to see if the carpet is damp or wet on all compartments
My carpet is dry, but I am curious what a wet compartment would tell. Also, you say sensor quite a few times, I just want to make sure that I am following: is the accelerometer sensor the same sensor that sends a signal telling the transmission when the ABS is working? Thanks for your help thus far.
If I turn off ESP, could I test the idea that the sensor's being faulty is causing the jittering of my car up inclines?
First, I want you to clarify what transmission issue is solved when replacing the sensor. At first I thought you were referring to the vibration issue I was having, but I now think that you were talking about the fault code issue (one being present in ABS controller, but not any codes in the transmission controller). Which were you referring to?
Regardless, back to the vibration issue: could my trouble I described in the original post be a bad CV joint or multiple bad CV joints? I notice that as I coast and slow down to a red light, for example, I feel/hear an ever-so slight ticking or popping. This occurs at decreasing speeds <20mph and on flat streets with my wheels pointed straight. Could CV joints be causing this tick/pop as well as my vibrations I feel on acceleration up an incline?