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Fiddler
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 Posted: Mon Jul 07, 2008 11:00 am Post subject: BMW 520 i SE 1989 |
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Problem with cold starting. Hit or miss. If you miss it, car floods
and I have to wait for a while to have another go. If it kicks in, I
still have to wait a while for engine to warm up before I can drive
away otherwise the engine cuts off and of course the steering locks.
Is it something to do with the auto choke? Either way, what can I do
to solve this problem.
Would be most grateful for ANY help or suggestions on the above.
Fiddler
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Posted at author's request, using moderated http://www.AutoBoardz.com interface
Thread archive: http://www.AutoBoardz.com/BMW-520-SE-1989-ftopict247866.html |
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John Burns
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| Posted: Tue Jul 08, 2008 4:12 am Post subject: Re: BMW 520 i SE 1989 |
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| Quote: |
Problem with cold starting. Hit or miss. If you miss it, car floods
and I have to wait for a while to have another go. If it kicks in, I
still have to wait a while for engine to warm up before I can drive
away otherwise the engine cuts off and of course the steering locks.
Is it something to do with the auto choke?
|
It doesn't have an auto-choke. It has Motronic fuel injection.
Could be a few things. Temperature sensor (or it's wiring) may not be
telling the ECU that the engine is cold.
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Who needs a life when you've got Unix? 
Email: john@unixnerd.demon.co.uk, John G.Burns B.Eng, Bonny Scotland
Web : http://www.unixnerd.demon.co.uk - The Ultimate BMW Homepage!
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Dave Plowman (News)
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| Posted: Tue Jul 08, 2008 4:47 am Post subject: Re: BMW 520 i SE 1989 |
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In article <4872A2D0.328@unixnerd.demon.co.uk>,
John Burns <john@unixnerd.demon.co.uk> wrote:
| Quote: |
Could be a few things. Temperature sensor (or it's wiring) may not be
telling the ECU that the engine is cold.
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IMHO they usually fail the other way round - causing overfuelling.
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*Don't worry; it only seems kinky the first time.*
Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound. |
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pheonix1t@gmail.com
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| Posted: Tue Jul 08, 2008 1:38 pm Post subject: Re: BMW 520 i SE 1989 |
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On Jul 7, 3:22 am, Fiddler <n...@000.com> wrote:
| Quote: |
Problem with cold starting. Hit or miss. If you miss it, car floods
and I have to wait for a while to have another go. If it kicks in, I
still have to wait a while for engine to warm up before I can drive
away otherwise the engine cuts off and of course the steering locks.
Is it something to do with the auto choke? Either way, what can I do
to solve this problem.
Would be most grateful for ANY help or suggestions on the above.
Fiddler
--
Posted at author's request, using moderatedhttp://www.AutoBoardz.cominterface
Thread archive:http://www.AutoBoardz.com/BMW-520-SE-1989-ftopict247866.html
|
HI,
I've seen this problem on other cars I've worked on. It turned out to
be leaking gaskets on intake manifold and leaking engine vacuum lines.
On older engines, the heat destroys these parts and it's hard to
diagnose it down to one vacuum line or one gasket on the manifold.
After I replaced all vacuum lines with silicon ones and put new
gaskets for intake manifold all these odd problems went away. The
engine also ran much smoother.
Is your engine running a bit rough when it does run? Have you run any
computer diagnostics on it?
What's the mileage?
Good luck,
Oskar |
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