PO372

[Ghettogmc23]

Shouldn't have to change the harness grounds unless they are really bad. If it does it when it's warm then my guess would be towards the ICM at this point. I've never had any experience with it since I've had coil per cylinder from day 1 but I have read a lot of issues with them when they get hot. I think autozone can test it for you too. Just have them run it til it heats up n see if it gets worse. Just seems weird that if it was the ICM it would cause so many different codes.

[77 Formula]

Still having problems I was driving my car last night and it went to popping and the tach went crazy then the tach died and the car started running normal again then every once and a while the tach would jump around but no miss or pop during that time

[burntorange]

Still having problems I was driving my car last night and it went to popping and the tach went crazy then the tach died and the car started running normal again then every once and a while the tach would jump around but no miss or pop during that time

my 97 camaro is doing the same thing but only code im getting is a po372 the opti harness plug has been change and was realy corroded up could my opti be bad?