1999 park avenue misses intermittently

1999 BUICK PARK AVENUE
175,000 MILES • 6 CYL • FWD • AUTOMATIC
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KALTHOUSE
  • MEMBER
  • 2 POSTS
I have a 1999 park avenue base - it intermittently misses and stalls when hot. I have replaced the fuel filter, changed the wires and plugs, cleaned the mass air flow sensor, changed the fuel pump, and Ohm'ed out the fuel injectors all were @ 13 ohms. It still runs poorly no impact on the issue? What else could it be? It runs good cold but after 5 miles the issue comes on.
Nov 22, 2010 at 10:39 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Hi kalthouse, Welcome to 2carpros and TY for the donation

Engine running rough or misfiring can be cause by the following:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve
Nov 25, 2010 at 8:52 PM
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