1993 BMW 535I ENGINE MISS-FIREING?

  • Tiny
  • SRDC5
  • 1993 BMW 535i

Engine Mechanical problem
1993 BMW 535i 6 cyl Two Wheel Drive Automatic 230000 miles

hey guys,

my bmw 535i seems to stumble at cold start like its misfireing or somthing. The engine runs very ruff. And I believe when the gas is appplied it runs fine. What could the problem(s) be? And what should I check?

Monday, March 15th, 2010 AT 7:06 PM

1 Answer

  • Tiny
  • rasmataz
  • Member

Engine running rough or misfiring can be cause by the following-inspect and test all the following listed below: 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.

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Monday, March 15th, 2010 AT 9:53 PM

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