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Showing results for tags 'rough idle'.
Found 2 results
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Hello all, I have a nightmare A5 petrol coupe 1.8TFSI that's been plagued with an erratic idling issue for 3 months now. It has stumped so called qualified Audi trained mechanics and master-technicians ! I have had the throttle body, MAP sensor, PCV valve rubber gasket replaced with no improvement upon advice from these expert idiots. I have had a smoke test that has pinpointed no leaks at all. Have been told that now it is a case for Audi £££ charging ppl . The car ran fine for 4 months and out of the blue the engine light came on followed by the rough idle. There has been no loss of power and no strange whistles or sounds from the engine. When car is started from cold it seems ok but once warmed up or the throttle blipped then the rough idle begins! codes state higher than expected engine rpm and codes cite possible air intake leak, MAP/MAF sensor correlation. It has already cost me serious money in parts replaced not to mention the hours wasted diagnosing what the hell is wrong! Please help? Thank you
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Once my car is warmed it, it idles at only 590rpm and feels pretty rough when I'm sitting in traffic or even manoevring to get into a parking space. The car vibrates. When the engine is cool it idles perfectly at between 750-800rpm. Car has about 42K miles on the clock. In all other respects it runs fine. I've been back to my Audi garage several times but have so far been unable to improve things. I'm concerned that I am somehow damaging the car by using it like this. Reverse often feels pretty bad. Any ideas what it could be ? Would changing the calculator do it or is it more likely a dirty sensor somewhere malfunctioning, or maybe something else ?
