I posted a comment about white smoke on replaceing my maf now that has gone.
I swaped my maf back to old one no white smoke, my car still seem to die throught.
The car will not start with out my putting my foot on the power then it goes from 300rpm to 1000rpm then bk down to 300rmp then it either decided it want to cut out (need to restart with power) Or it then leavel off at 1000rpm.
I also if i rev it to 4000rpm then let it go bk down it will just cut out or go to like 100rpm light comes on then it manages to save it self.
Can anyone help me? also i heard it could be idle control sensor can anyone tell me where that is located.
Regards
Chris Johnson
The MAF has been a source of trouble for Audi such that the cost of replacement was halved a few years ago.
I am not sure why replacing the MAF would produce white smoke - white smoke being symptomatic of steam from water or coolant ingress into the cylinders or extreme amounts of fuel entering the cylinders. The latter is almost exclusively a diesel problem.
Generally if the MAF is suspected of being the cause of rough running then disconnecting it will cause the engine management to switch to the get-you-home programme. If the engine runs better the MAF is probably faulty..
As a matter of interest, it is necessary when changing parts on Audi that only the correct parts are used. Not only must they look right and be intended for that year and model but the part numbers should also be correct. A couple of digits out isn't close enough...
I am not sure where the idle thingy is on your Audi - the earlier models used a throttle body with the idle/throttle sensor and idle control all integrated in one very expensive lump and that is how I discovered the importance of correct part numbers.
In order to save my customer from scrapping what was otherwise a good car, I took a can-opener to the throttle body and opened it and found two broken wires and mananged to repair them. I needed to do some tricky welding to put it back together. The car went on for another seven years afterwards...
The car made no white smoke prior to the repair but the idle was very erratic...
SOURCE: White Smoke out my exhause,
Hello chris first thing you need to do is while the car is running go to the rear of your car have somone increase the gas pedal to get it to smoke now smell the smoke does it smell like antifreeze if it does most likely headgasket going wich means your head needs to be pulled to change the gasket if it smells like oil possible valve seals clogged oil returns this is all serviced under your valve cover if car is turbo turbo seal internal most likely ruptured and is letting oil get into the exhaust port side have your turbo checked if there is wettness around the housing areallook for exsesive oil leaking externally goodluck please rate
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