Re: Cold Starting...again

["Andrew Mulder" <drewsrocco@hotmail.com>]

This comes strait from the Bently Manuel

PROBABLE CAUSE

a. Cold start valve or thermo-time switch faulty
b. Fuel pump not running
c. Air flow sensor plate rest position incorrect
d. Fuel pressure incorrect

CORRECTIVE ACTION

a. Test cold start valve and thermo-time switch
b. Check fuel pump fuse and fuel pump relay.
c. Inspect air flow sensor plate rest position and adjust as necessary.
d. Check differential pressure regulator, system pressure, and 
differential presure.
e. Test coolant temperature sensor and wiring. Repair wiring or replace 
sensor as required.

As for cranking a little weaker, in my experiance, most batteries tend 
to have less performence when the outside temperature drops.  I lived in 
Alaska for eight years, where you basically keep your car in garage, use 
a block heater,  or have a bunch of cold cranking amps.

HTH

Andrew P.
"87" 16V Rocco

Benjamin Wrote:

>Date: Mon, 23 Nov 1998 00:13:18 -0500
>To: scirocco-L@scirocco.org
>From: Benjamin Harder <harderb@email.uc.edu>
>Subject: Cold Starting...again
>
>  I realize that this topic has been around a few times already, but my 
>86 16v is still having cold start problems.  I have taken various 
suggestions
>from the list and tried some grounding of my own...here's a list of 
what 
>I've tried so far...
>  1.  Battery Neg. - to directly below the airbox on the frame (2 guage 
cable)
>  2.  Battery Neg. - to ignition coil on firewall (4 guage wire)
>  3.  Battery Neg. - to alternator housing...mounting bolt (4 guage 
wire)
>  4.  Battery Pos. + to starter (2 guage cable)
>  5.  Starter to Alternator (4 guage wire)
>*Basically, I have replaced all factory cables and then added a few 
extra
>grounds.
>    The rocco has this starting problem when the engine is cold...
>The engine cranks over fairly well (still seems to crank a bit weaker 
when
>it's
>below 40 F outside).  The starter sounds normal and cranks fairly
>consistently.
>Once the engine does fire, everything seems fine...engine runs 
normally.
>The engine starts right away after it is warm and has been running for 
a
>while. 
>Hmmmm...I just must be missing something here. I am still trying to 
figure
>out if I still have a simple grounding case or if I am to the point of 
needing
>to have the car's fuel system looked at... There are so many factors to 
having
>a good start that I just don't know enough.  
>   My car has about 110,000 miles (odo. stopped) and has had no work 
done 
>to the original fuel system besides new Bosch fuel filter (a few months 
ago).
>Also, I just got a new battery back in the summer.  
>   I would REALLY appreciate any further thoughts on this...fortunately 
the
>rocco still does start...just takes some time sometimes...
>
>  
>                                 
>
>Benjamin Harder
>86.5 Scirocco 16v
>http://members.xoom.com/Scirocco16v
>
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