4985Cold start problems below 15F/-10C
- Feb 5, 2007Hello All,
I've been having some difficulty starting my 86 535i (usa) on
particularly cold mornings. Cranks strong and steady, but doesn't
catch. After the first time i went and replaced the plugs as they
were a bit worn. My mechanic did a compression test and one of the
cylinders (4 i think) was a bit low-around 50 lbs. Ran fine since.
Above about 20F starts instantly and without hesitation.
This morning it was about 10F/-12C and she took about 2 minutes of
cranking to start. Then she ran rough and smoky for about 30 seconds
and then was good as new. I know it isn't the battery as battery
tests good and i jumped it once while trying to start it. Searching
the archives in this group doesn't show much, other web searches
suggest replacing the cold start valve.
Anyone have an opinion/suggestion?
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