Originally Posted by I8U

Hey man, I don't want you to get more upset but I have had ongoing ignition problems for as long as I've had this latest motor...30000 miles now. Dealer kept swapping the plugs, wires, and coils about every 6-8k miles under parts warrantry before they decided that my PCM needed to be replaced. Well, within a week of replacing the PCM my misfires were back...I get the occasional high speed misfire but it generally misfires just idling. Only thing I can think of now is replacing the crank angle sensor...that's the only thing I can come up with. I was thinking since they swapped all the parts over from the other motor that the sensor just went bad and threw the timing off a bit. Problem is it's 165 bucks from Mazda and the dealer won't cover mine because I'm way out of power train warranty. I told them they can just keep throwing plugs and coils at it until they decide to save themselves some money and just replace the sensor for a 1/4 of the price.