mn12sc35th
Registered User
I'm having a sort of strange problem at idle. It's on my 91 NA V6. In drive at idle it usually runs 6-700 rpms (800 in park) sometimes it will rev up about 500 and back down repeatedly on it's own. Sometimes in drive at a stoplight if the brake isn't in hard it will try to move. What could cause this? No check engine light no other symptoms.