Have you ever replaced the ignition switch?   Its a common thread around
here when it comes to weird 'No-start' problems.

On 10/20/07, maxjoyce@ipa.net <maxjoyce@ipa.net> wrote:
>
> Folks:  Done some research through the Haltech website and some serious
> head scratching and here's what I've ascertained.
>
> 1.  The van starts hardest after an overnight rest, nigh on impossible
> this past week.
> 2.  Rainy weather seems to make it harder to start.
> 3. Roll starting it in the morning, it fires right up.
>
> Initially, I thought like several of you that the engine wasn't getting
> gas from whatever cold start program Haltech has in there.  Once the engine
> starts, that's not the case; it runs fine.  Only sitting in the work parking
> lot all day seems to be about the length of time necessary for it to not
> start again.  2-3 hours breaks between startings aren't affected.  Could
> there be enough residual gas vapor in the intake maifold/comustion chamber
> in those shorter stops to eliminate the "need" for the cold start program
> resulting in a fairly easy start?  Iguess the ambient air temperature sensor
> in the air cleaner could also be at fault.
> \
> I'm thinking that maybe(and confirmed by the Haltech troublshooting guide)
> that there might be some sort of signal cutting out to the Haltech ECU when
> the starter is engaged.  I doubt seriously that that X relay in the fuse
> block could be the cause, but something is making it nearly impossible for
> it to start after 7-10 hours of sitting while the starter is engaged.  The
> only flaw in that thinking is that last winter when it would only balk at
> starting when it got below  10 degrees F, it is now exhibiting those same
> symptoms at 50 and 60 degrees F.  If the Hall sender were going bad, it
> wouldn't run well period, not just at start up.  My cat housing has nothing
> in it except the O2 sensor.  Anyone that curious about Haltech can go to
> their website(  www.haltech.com  )  and click on support or downloads and
> see what's shakin'
>
> What sort of wiring or electrical issues do I need to look out for here if
> that is indeed the problem?
>
> Thanks
>
> DM&FS
>

--
Jake
1984 Vanagon GL
1986 Westy Weekender "Dixie"
www.crescentbeachguitar.com
http://subyjake.googlepages.com/