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Message |
Guest
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 Posted:
Thu Sep 01, 2005 4:42 am Post subject:
94 740IL has problems starting - vapor lock? |
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Lately my 94 740IL has been having problems starting. It didn't start for
2-3 days over last weekend, started and ran fine Monday but hasn't started
since. All the electrical systems in the car are fine, the battery is fine,
no other issues going on. Funny thing is, when I drive to work and it won't
start at the end of the day, if I wait 20-30 minutes it starts right up,
which leads one of my co-workers to think it could be vapor lock. I've only
had this problem when the weather is 75+. Any ideas?
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JimV
Guest
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| Posted:
Thu Sep 01, 2005 5:15 am Post subject:
Re: 94 740IL has problems starting - vapor lock? |
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jvq576@gitrdone.org wrote:
| Quote: | Lately my 94 740IL has been having problems starting. It didn't start for
2-3 days over last weekend, started and ran fine Monday but hasn't started
since. All the electrical systems in the car are fine, the battery is fine,
no other issues going on. Funny thing is, when I drive to work and it won't
start at the end of the day, if I wait 20-30 minutes it starts right up,
which leads one of my co-workers to think it could be vapor lock. I've only
had this problem when the weather is 75+. Any ideas?
Vapor lock is a non-issue in fuel injected cars. I'd be checking my temp |
sensor. |
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Dave Plowman (News)
Guest
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| Posted:
Thu Sep 01, 2005 12:55 pm Post subject:
Re: 94 740IL has problems starting - vapor lock? |
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In article <ba6dnTv5lciF1YveRVn-uw@comcast.com>,
JimV <jv9999@yahoo.com> wrote:
| Quote: | Vapor lock is a non-issue in fuel injected cars.
|
Oh no it's not. I have an EFI V-8 (not BMW) which suffers badly - but only
when you attempt a hot re-start on a very hot day. It will eventually
start on a couple of cylinders and come good after some time. But unlike a
carb car where you have to re-fill the carbs after evaporation for a cold
start the injection makes this instant because of the pressurized fuel rail
| Quote: | I'd be checking my temp sensor.
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But I'd say you're right it's not the reason in this case.
--
*Am I ambivalent? Well, yes and no.
Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.
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John Burns
Guest
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| Posted:
Thu Sep 01, 2005 1:41 pm Post subject:
Re: 94 740IL has problems starting - vapor lock? |
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| Quote: | Lately my 94 740IL has been having problems starting. It didn't start for
2-3 days over last weekend, started and ran fine Monday but hasn't started
since. All the electrical systems in the car are fine, the battery is fine,
no other issues going on. Funny thing is, when I drive to work and it won't
start at the end of the day, if I wait 20-30 minutes it starts right up,
which leads one of my co-workers to think it could be vapor lock. I've only
had this problem when the weather is 75+. Any ideas?
|
When my 635 did this it was a combination of bad relays and dirty
wiring. First thing I'd try is a new fuel pump relay.
--
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!
Need Sun or HP Unix kit? http://www.unixnerd.demon.co.uk/unix.html |
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JB
Guest
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| Posted:
Thu Sep 01, 2005 4:25 pm Post subject:
Re: 94 740IL has problems starting - vapor lock? |
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"John Burns" <john@unixnerd.demon.co.uk> wrote in message
news:4316BED7.480F@unixnerd.demon.co.uk...
| Quote: | Lately my 94 740IL has been having problems starting. It didn't start
for
2-3 days over last weekend, started and ran fine Monday but hasn't
started
since. All the electrical systems in the car are fine, the battery is
fine,
no other issues going on. Funny thing is, when I drive to work and it
won't
start at the end of the day, if I wait 20-30 minutes it starts right up,
which leads one of my co-workers to think it could be vapor lock. I've
only
had this problem when the weather is 75+. Any ideas?
When my 635 did this it was a combination of bad relays and dirty
wiring. First thing I'd try is a new fuel pump relay.
Agreed. Probably a bad solder joint or component in the relay. I've seen |
this on several E28/23/24 models.
JB |
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