ENGINE MISS-FIREING?

1993 BMW 535i

Tiny

SRDC5

March, 15, 2010 AT 7:06 PM

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?

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Engine Miss

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1 Answer

Tiny

rasmataz

March, 15, 2010 AT 9:53 PM

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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