Hey guys first time posting, just recently bought a 1991 vn commodore. When I turn the car on it idles high and then really low almost as if it's about to stall. I've changed iac, tps, cleaned the throttle body, new leads, new spark plugs, put l67 coilpack in, new fuel filter and oil filter and oil, and ran injector cleaner through it. Started it up today and thought it was running fine until it started this again. Stalled on me twice, can anyone help with this problem it's driving me insane.