1996 Buick Riviera Q&A

1996 Buick Riviera Question: Check engine light is on. 145,000 miles (burns no oil or leaks.)

scanner code is PO102. I replaced the MAP sensor with an AC-Delco part.Also checked wiring harness & connector(O.K) Light did not go off. Problem, car has a tendacy to hesitate at around 60 mph. Does not die & no MISFIRE.Transmission is O.K. At times, Car has a tendacy to stall at idle. Replaced the following: Spark Plugs & Wires (AC Delco) MAP Sensor(AC Delco) Mass Airflow Sensor(AC Delco) New Fuel Pump New Fuel Pressure Regulator New Fuel Filter New PVC Valve Oil change & filter Cleaned fuel injector plugs Cleaned Throttle body EGR Valve(AC Delco) Replaced coil packs(3) Replaced all vacuum lines & checked for vacuum leaks(O.K.) -
Answer 1
Ia have seen O2 Heator wireing cause problems like this check connectors and wiring because looks like you have done the normal repairs -
Comment 1
Thanks for your reply. I did get a o2 heater code 6 months ago, I replaced the o2 sensor with a AC-Delco type & the code went away. one of the mechanics I talked to said that he had a buick riviera, like mine, & it was the trottle control sensor but was not throwing any code. Is this a possibility? Thanks for your help. gilraker -
Comment 2
I guess that it is possible as it is in the sistem, I just haven't seen that problem, just make sure all MAP compomnets are on it and good connection are good -