4987Re: Cold start problems below 15F/-10C
- Feb 5, 2007Had the same problem on my 533i and I went back to the original plug
number-started perfect. I was using Bosch Platinum single electrode
plugs. I think I read something a long time ago about them not burning
hot enough. They were what O'Reillys Auto Parts prescribed; but I
think each original plug is resistance-tuned for each particular engine.
Anyone have any answers?
--- In bmwe28@..., "deindieb" <deindieb@...> wrote:
> Hello 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?
> New York
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