cold starting problem '93 300e 2.8L

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darby - 31 Dec 2004 02:49 GMT

The car starts fine when it is warm, but with the recent cold snap in
Houston over Christmas it was very hard to start. Like the choke wasn't
working if it were a carburated engine. The car ran fine once I finally
got it started. This happened 3 consecutive days so it was not an
isolated incident. Any ideas on where to start?

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Martin Joseph - 31 Dec 2004 07:18 GMT

> The car starts fine when it is warm, but with the recent cold snap in
> Houston over Christmas it was very hard to start. Like the choke wasn't
> working if it were a carburated engine. The car ran fine once I finally
> got it started. This happened 3 consecutive days so it was not an
> isolated incident. Any ideas on where to start?

You might just be getting fuel that isn't properly mixed for the
temperature. Hard to tell. There also might be a cold start injector
that doesn't work 100%?

Marty

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T.G. Lambach - 31 Dec 2004 08:49 GMT

Fuel injected engines have a cold start system that adds fuel to the
intake manifold for a very short time (5 to 15 sec.) to get the engine
running. The system has a temp sensor, a time/temp. relay and an
electric valve called the cold start injector. All must work.

Any of these could be bad or unplugged, I'd suspect the time/temp relay.

That's your car's problem.

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AJDalton7 - 31 Dec 2004 16:39 GMT

>Fuel injected engines have a cold start system that adds fuel to the
>intake manifold for a very short time (5 to 15 sec.) to get the engine
>running. The system has a temp sensor, a time/temp. relay and an
>electric valve called the cold start injector. All must work.

You chassis has none of that .
It is Full EFI and your problem is most likely a bad OVP relay.
It is behind the panel, behind the battery..
Tall, aluminum can w/fuse on top.Give it a Tap next time car will not start.
The part has been upgraded .
If the old relay is a 'Siemens", change it .. The new relay will have the
improved circuitry.

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T.G. Lambach - 31 Dec 2004 22:06 GMT

Follow AJDalton's suggestion, he knows more about these cars than I do.

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