problems with the car...crap idle

[GTCharles]

You don't have to update the program on your pcm but I'd recommend you ask a dealership to see if there is an update before you get a tune. That way you have the latest and greatest from ford as a base for the tune to work off of.

 

[jstreet0204]

Use your xcal to datalog the problem. Log TPS, all 4 fuel trims, loop state, MAF voltage, o2 voltage, IAT sensor, spark, and load. Then post back the results. Every other post on here is just a guess. Get the datalog info and we can point you in the right direction.

 

[the98stang]

Use your xcal to datalog the problem. Log TPS, all 4 fuel trims, loop state, MAF voltage, o2 voltage, IAT sensor, spark, and load. Then post back the results. Every other post on here is just a guess. Get the datalog info and we can point you in the right direction.

very good idea man..I didn't even think about using it! I'll get the results soon when I can borrow a lap top...