Hey guys, I'm new to the forum, thanks in advance for the help!
I have an 89 c1500, fresh 350 with a 5 speed. Have msd 6al box, motorvation stage 2 chip, mid length headers 2 1/2 in exhaust with no cats, tbi spacer , ultimate tbi mod, and new tps , iac and map sensors. I am experiencing high idle, erratic at times. Have checked for vacuum leaks and found none, changed the iac with another new unit even tried adjusting the plunger out further with the same results. After changing and adjusting both times it idled great for the first few minutes so I shut it off assuming it was fixed...wrong! Next time I started it the issue was right back. Anybody have any experience with this? Also have an aftermarket breather on it with flow through lid if that matters.
I have an 89 c1500, fresh 350 with a 5 speed. Have msd 6al box, motorvation stage 2 chip, mid length headers 2 1/2 in exhaust with no cats, tbi spacer , ultimate tbi mod, and new tps , iac and map sensors. I am experiencing high idle, erratic at times. Have checked for vacuum leaks and found none, changed the iac with another new unit even tried adjusting the plunger out further with the same results. After changing and adjusting both times it idled great for the first few minutes so I shut it off assuming it was fixed...wrong! Next time I started it the issue was right back. Anybody have any experience with this? Also have an aftermarket breather on it with flow through lid if that matters.