Cold Start issues, '89 200Q MC2

[Larry C Leung]

Thanks guys for your input, however in going 
through my Bentley for the 100/200 and there is 
no reference to the WUR. It must be for the earlier
code engines. 

However, in checking the connectors for conductivity,
I had to separate the connector to the ECU. Today,
the car started and ran fine. It makes me want to 
consider (basically when I have time) breaking out the
DeOxit and hitting every pin to the ECU. At this point,
I'm wondering if breaking and refastening the connector
to the ECU served to clean the connectors. Hmmmm.

As for the coolant temp sensors, I do know that they are
rather inexpensive, as I had replaced them in the past. 
Since they are in spec, I'm planning to leave them be. 

We'll see tomorrow, which should be a cooler morning. 

LL - NY


On Fri, 17 Sep 2004 10:11:26 -0400 George Tur <getur at optonline.net>
writes:
> On Thursday 16 September 2004 21:15, Larry C Leung wrote:
> > Looking for list help.
> >
> > Patient, '89 200Q, MC2 198K miles
> >
> > Symptom. Hard Cold Start, won't idle until car gets warm.
> >
> > No codes thrown. Output tests make Cold Start Valve click
> > By symptoms only (again, no codes shown), it suggests a bad
> > coolant temp sensor. Soooo:
> >
> ****************
> Sounds a lot like the problem my son had with his 87 5ktq earlier 
> this year. 
> The problem turned out to be the warm up regulator. I'm not aware of 
> what 
> procedure he used to diagnose the problem, he was going back and 
> forth 
> between the Bentley and the Bosch  fuel injection books, but he got 
> a used 
> warm up regulator from Chris Semple for $50 and installed it. The 
> car starts 
> up without any problem now.
> 
> George Tur
> 91 V8
> 
>