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1993 BMW 535i engine miss-fireing?

Tiny
SRDC5
  • MEMBER
  • 1993 BMW 535I
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 230,000 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 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
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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