Warm Start Problem with 200 TQ (when it is very cold)

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <34C1861E.367B@mmmpcc.org> "Fred L. DeRoos" writes:

> I'll try this test and see what happens. I have three brown wires
> attached to the intake manifold.  I've checked them and they are clean
> (not corroded) and have essentially 0 ohms resistance to other grounded
> parts of the car, e.g., alternator frame, etc.

Doesn't necessarily mean a thing.  It's their resistance back to the ECU 
connector that's important.

> >>If it starts more easily, wait until you can repeat the test - but
> >>this time pull the connector off the warm-up regulator before testing.
> 
> Do I then run the fuel pump for another 30 seconds with the connector
> off the warm-up regulator before trying to start?  Or just remove the
> connector from the warm-up regulator before trying to start?  I think
> you mean this.  

No, the former.  The heater in the warm-up regulator is hard-wired in parallel 
with the fuel pump.  During the first test, you will be doing two things: 
repressurising the fuel system, and heating the warm-up regulator.  The idea is 
to do a complete repeat for the second test _without_ heating the warm-up 
regulator. 

-- 
 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club