My buddies 04 is acting up and has been for awhile. It was backfiring and idling funny for awhile almost like a miss or as if the timing is being advanced then retarded. Finally it threw a code for the crankposition sensor then two weeks later died all together. Replaced the sensor starts now but does the same weired idle. If you go to turn the heater on or the ac it drops idle and wants to die. Stock turbo, full three inch exhaust and an air intake. Any ideas?
Even tried resetting ECM

 

what rpm does the idle drop down to with the a/c on at idle?

 

like 400-500 sometimes lower

 

check you alternator??

 

i had the same problem in my nissan and it was idle control valve

 

+1, that happened in my 03 evo

 

And if it was the idle control motor it wouldnt throw a code would it?

 

mine never threw a code. i got my IAC from abby @ milspec if i remember correctly for $50

 

Is there a like to there website available?

 

PM him on here. I am sure he will give you all the info you need.