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1999 Park Avenue misses when hot

Tiny
KALTHOUSE
  • MEMBER
  • 1999 BUICK PARK AVENUE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 175,000 MILES
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. It still runs poorly no impact on the issue? What else could it be?
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Monday, November 22nd, 2010 AT 10:34 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plug
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
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Tuesday, November 23rd, 2010 AT 12:33 AM

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