<VV> PG idle

[Bill Elliott]

As I continue to prepare the wife's Corvair-powered '70 VW Westy for the 
solo mother-daughter trip to the west coast and back this summer (via 
RT66), I find myself still fighting  an idling problem.

The drivetrain is a 110/PG... and my PG experience is limited. Carbs are 
recent, hoses all new, engine is strong, running an Ignitor II ignition, 
63A 10SI alternator, etc... only real change from a Corvair application 
is that I'm also powering a vacuum power brake assembly.

The VW runs perfectly... except it likes to occasionally stall at idle 
when in gear. The problem is more noticeable when the engine is either 
"just" warmed up (somewhat to be expected) and when the engine is fully 
hot with a heavy electrical load (lights, fans, etc... charging two full 
size batteries as well).  While most of the time the idle is nice and 
smooth in gear, it sometimes just slowly drops off, stumbles, then dies. 

I was initially thinking "mixture" but I've tweaked the idle mixture to 
slightly more lean and then to slightly more rich (using the "properly 
adjusted" mixture of about 2 turns out as the mid-point) and it seems to 
make  no difference. It's so intermittent that it's difficult to really 
troubleshoot...

Vacuum advance is not triggered.

I have the engine idling about 800rpm in neutral and right at 680-700 in 
drive. Going to a lower idle makes it worse... and going to a higher 
idle seems to not significantly change the idle in gear. It never dies 
in neutral.

It's "good enough" to drive "as is" but if I could improve it slightly, 
I'd like to.

BTW, mother and daughter will be carrying a CORSA roster... I hope they 
don't find a need to call anyone... ;-)

Thanks!
Bill Elliott


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