1997 740il single misfire common causes?

jeanpxrk · 03-19-2023, 09:50 PM

1997 740il with 142k miles on it. The guy replaced spark plugs on there but get a check engine for misfire intermittently. No oil in the spark plug wells with “hesitation” at high rpm in 2nd gear.
Could it just be coils or injectors?

Chihuahua · 03-24-2023, 05:02 PM

Quote:

Originally Posted by jeanpxrk

1997 740il with 142k miles on it. The guy replaced spark plugs on there but get a check engine for misfire intermittently. No oil in the spark plug wells with “hesitation” at high rpm in 2nd gear.
Could it just be coils or injectors?

Do you keep getting misfire on the same cylinder?

jeanpxrk · 03-24-2023, 05:55 PM

Quote:

Originally Posted by Chihuahua

Do you keep getting misfire on the same cylinder?

yes i do

Chihuahua · 03-26-2023, 04:07 PM

Quote:

Originally Posted by jeanpxrk

yes i do

Did you try moving a known good ignition coil over to the cylinder that's misfiring?

03-19-2023, 09:50 PM	#1
jeanpxrk New Member 38 Rep 17 Posts Drives: bmw z4 Join Date: Oct 2022 Location: las vegas iTrader: (0)	1997 740il single misfire common causes? 1997 740il with 142k miles on it. The guy replaced spark plugs on there but get a check engine for misfire intermittently. No oil in the spark plug wells with “hesitation” at high rpm in 2nd gear. Could it just be coils or injectors?
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