Okay I'm looking for a little confirmation on my situation.
I have a '88 302 that has been throwing KOER codes of 63 and 98.
I also had a stalling at idle issue.
While looking into my stalling issue I found my idle set screw broken off leaving the butterflies fully closed at idle. Well I removed the broken set screw and replaced it with a new one. I then set the idle to 700 rpm's with the IAC unplugged. After researching I now realize I should have been setting the idle around 400 rpm's - 600 rpm's. Well after setting the idle to 700 and plugging the IAC back up (and clearing the codes) I took it for a test drive. The truck was idling high (around 1000 - 1100 rpm's). So after about 30 miles I pulled over and re-adjusted the idle down. During the first 30 miles no CEL at all. So I drove another 10 miles or so with the adjusted idle and the CEL started to flash. It flashed for a bit then just stayed on. I continued home and checked the codes and codes 63 and 98 came up again.
So after researching I have came to the conclusion (If I am grasping this correctly!) that the idle setting plays a part in how the TP sensor works/reacts. Correct? Is this why I had no CEL while the idle was set higher?
And when I adjusted the idle lower the TP sensor then was out of range throwing the code 63 and consequently code 98.
Does this all seem reasonable? If so then all I should need to do is go and reset the idle to a max of 600 rpm's with the IAC unplugged and I should be good to go. Right? Please say yes!! LOL!
Anyways.............let me know if I am totally of base here of if this is correct.
Thanks!:beer
I have a '88 302 that has been throwing KOER codes of 63 and 98.
I also had a stalling at idle issue.
While looking into my stalling issue I found my idle set screw broken off leaving the butterflies fully closed at idle. Well I removed the broken set screw and replaced it with a new one. I then set the idle to 700 rpm's with the IAC unplugged. After researching I now realize I should have been setting the idle around 400 rpm's - 600 rpm's. Well after setting the idle to 700 and plugging the IAC back up (and clearing the codes) I took it for a test drive. The truck was idling high (around 1000 - 1100 rpm's). So after about 30 miles I pulled over and re-adjusted the idle down. During the first 30 miles no CEL at all. So I drove another 10 miles or so with the adjusted idle and the CEL started to flash. It flashed for a bit then just stayed on. I continued home and checked the codes and codes 63 and 98 came up again.
So after researching I have came to the conclusion (If I am grasping this correctly!) that the idle setting plays a part in how the TP sensor works/reacts. Correct? Is this why I had no CEL while the idle was set higher?
And when I adjusted the idle lower the TP sensor then was out of range throwing the code 63 and consequently code 98.
Does this all seem reasonable? If so then all I should need to do is go and reset the idle to a max of 600 rpm's with the IAC unplugged and I should be good to go. Right? Please say yes!! LOL!
Anyways.............let me know if I am totally of base here of if this is correct.
Thanks!:beer