M40 backfiring
Moderator: martauto
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SAP1
- E30 Zone Regular
- Posts: 466
- Joined: Mon May 27, 2013 11:00 pm
Hi I have a 1989 BMW 318i M40 when I drive my car when cold it's cuts out and pops and bangs and backfires. Buts its okay when hot. I have checked the distributor and changed the spark plugs but still happens. Any other ideas of what it could be. Could it be ignition coil?
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soul4t
- E30 Zone Regular
- Posts: 381
- Joined: Wed Feb 23, 2011 11:00 pm
- Location: Bristol
The normal 1st step is normally to check the blue temp sensor at the ecu plug...have a look in the wiki section at blue temp sensor (or something similar).
You will need a multimeter!
You will need a multimeter!