now i know my blazers timing and idle are electronically controlled but is there any way to adjust it? its got heads, cai, and exhaust it almost sounds like it has an aftermarket cam

 

Altering your idle speed will not impact your off the line performance.

 

actually it does ive done it several times

 

ok if you have done it several times why are you asking how to do it? and i would have to agree with swartlkk it doesnt affect your time off the line at a standstill.

 

my fault guys i was thinking about two things but only talking about one i want to adjust the idle for sound and the timing for speed but i edited the original message. now the timing does affect the speed and i was referring to some race mustangs i had

 

You would need to tune the ECU to keep it happy with any timing change.

 

yah i am just gonna replace the original ecu with an upgraded performance one i found which goes right in place of the original chip