here's what i have
94 GT only mods are ;cai,smog delete & off road xhaust.
these have been on the car for a while but this problem has just started. Ok car runs completely fine with no issue's until you turn the hvac control from off to any accessory, whether it be floor,defrost etc.. about 2 minutes later the car feels like it is running on 5 cyl's ,missing,popping back thru the intake,CEL comes on and stays on then it will clear up for a few minutes with a power surge then repeat all over again. After the car sits for a couple of hours it is back to running fine until you switch on the heat. the 3 codes i have (172,173 & 217) which i believe are coming from the way the car is running when it is missing. so my question is what could be the culprit behind the problem that causes it to start missing because i have no clue. Any ideas or advice would be greatly appreciated.
94 GT only mods are ;cai,smog delete & off road xhaust.
these have been on the car for a while but this problem has just started. Ok car runs completely fine with no issue's until you turn the hvac control from off to any accessory, whether it be floor,defrost etc.. about 2 minutes later the car feels like it is running on 5 cyl's ,missing,popping back thru the intake,CEL comes on and stays on then it will clear up for a few minutes with a power surge then repeat all over again. After the car sits for a couple of hours it is back to running fine until you switch on the heat. the 3 codes i have (172,173 & 217) which i believe are coming from the way the car is running when it is missing. so my question is what could be the culprit behind the problem that causes it to start missing because i have no clue. Any ideas or advice would be greatly appreciated.