during hot days with the a/c on for 15 to 20 minutes and in traffic or around town the engine will start to stall and the transmission doesn't know what gear to be in. it may stall out and always restarts but bucks and may not be in the right gear. check engine light comes on and sets code P0101. mass air flow circuit range/performance problem. i feel this is caused by something else. is it the MAF? air filter is fine, no vac. leaks, idle valve has been cleaned. tuneup is good. engine not overheating. it has been like this since i bought it new. dealer put in a new PCM but didn't solve the problem. truck has always had a slightly rough idle from new.
Feb 15, 2010 at 5:47 AM