Hello all,
I have a 1987 Olds Regency 98 Brougham with the 3.8 EFI engine. My situation is that It has had this Idle problem ever since I've owned it (4 years). I starts fine, idles high and after a couple minutes at normal idle is missed, idles rough and at time wants to die. If i put it in gear it has died on me many times. Start up again okay then continues. I have even had it die on me as I sat at a light. Again starts up fine. I have replaced plugs, wires. Throttle Position Sensor, Idle Air Control Valve, Mass Airflow Sensor, EGR, Checked fuel system. There are no diagnostic coded to help...one in a while my service engine light will go on only because it was about ti die on me but eventually goes off after a few seconds once i accelerate. Another symptom is hesitation on acceleration.
What can the problem be?...Please help!!!
