BMW E39 Mis fire

M

mass

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#1
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england
#1
I have a regular misfire problem which only happens at low rpm (less than 1500) and under load.
My local garage has replaced the Camshaft sensor, Lambda sensor, spark plugs and fuel filter (so has cost over £400 so far!!) and run god knows how many diagnostics but it still does it. I am thinking it could be a faulty ignition coil but the garage says it would show up on the diagnostic tool. Anyone else had this problem? Car has
 
M

mass

New Member
#2
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Location
england
#2
I have cracked it!!!... it was the number 1 ignition coil - so after the garage fitted new plugs, sensors, pipes, I did it on my own for £60 (thats what the garage did get right - a proper coil)
 
A

arditarighi

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#4
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Plano, Texas
#4
Same thing happened to me ...

mass said:
I have cracked it!!!... it was the number 1 ignition coil - so after the garage fitted new plugs, sensors, pipes, I did it on my own for £60 (thats what the garage did get right - a proper coil)
Click to expand...
I had a kind of hick-up, if you will, upon acceleration on 1k-2K rpm. Had the car back to dealer for a couple of times - they changed the spark plugs, but the problem was back after a few weeks. When I looked at the myself noticed that the plastic pipe connecting the Coil and Spark plug on the first Cylender was not locked inplace properly, like the rest of them. Cleaned it up and secured it in place - and I was very happt to find that the problem was solved - after that I have put in 110K miles on the car and no problem of that sort ...

rgrds,
/A
 
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