1998 BMW 328 Engine Chuggin

1998 BMW 328
200,000 MILES • 6 CYL • 2WD • MANUAL
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FUZZY012
  • MEMBER
  • 1 POST
My 98 bmw 328i is fine until it warms up then after it warms up the engine starts to chug almost like it has too much air in the gas it.. the chugging almost feels like it has a flat tire. what could cause that?
Feb 16, 2010 at 10:17 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard.
Feb 16, 2010 at 10:20 AM
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