Re: STILL running a little rich...??

["content22207" <brobertson@xxxx>]

Appears I'm last person to board this wagon...

When you state "vacuum not present when it's not supposed to be", does
that include spark advance at idle? I don't have cut off solenoid, and
in early PRV days ended up attaching my loose diaphragm to a full
vacuum nipple. Advanced ever living mess out of engine. Over enriched
to compensate. Yielded wonderful idle, but shot fuel economy to
pieces. Also killed performance at wider throttle positions. 

Ensure your spark advance is off at idle.

FYI: My spark advance now taken BEFORE throttle plates (like an old 
carburetor). R30 control pressure regulator has no vacuum chambers, 
so I don't get the full vacuum fuel enrichment spike you do.

Bill Robertson
#5939 

>--- In dmcnews@xxxxxxxxxxxxxxx, Soma576@xxxx wrote:
> List,
> 
> well i wound up getting my timing checked and my timing was off by 6
degrees. 
> as soon as that was adjusted, my car has ceased idleing erratically
when 
> warm. now i have NO complaints with driveability!!! finally after
3 years 
> everything seems to be working beautifully... the car starts up
immediately 
> every time, hot or cold, surges for about a minute or so when cold at 
> leisurely cycle until it finds the 'sweet spot' and idles at around 750 
> smooth as can be, and it doesn't fluctuate from that no matter how
long i 
> drive the car. 
> 
> my only complaints NOW are:
> 1. i'm barely getting 12 mpg in town (mostly on city streets, not much 
> highway). i have a manual and i don't abuse it. any ideas? 
> 2. when i start the car cold in the morning and don't let it warm
up, the car 
> starts to sputter around 2500-3000 RPM no matter what gear you are
in. this 
> continues for only 2 or 3 blocks. extremely short lived problem,
but happens 
> almost every time. why?
> 3. when i start the car cold, it still smells kinda rich, but not
nearly as 
> bad as it did when the timing was off. is this normal or should i
not be 
> able to smell the exhaust? once the car is warm, the exhaust is almost 
> non-existant.
> 
> as suggested in previous posts, i have checked all vacuum lines -
good. 
> throttle - good. three brass screws - seated. cold start valve
does NOT 
> leak when warm. vacuum is present at the proper places when
hot/cold, and not 
> present when it shouldn't be. timing? good now (set to factory
specs). ALL 
> ignition parts are about a year old.
> 
> here are a couple things to consider - i have a cat eliminator pipe,
accell 
> performance coil, K&N air filter. might make a difference?
> 
> the only thing i haven't done that i can think of is get the
fuel/air mixture 
> professionally checked. there are no shops in my area that have the 
> equipment. is this the final task?
> 
> any other ideas are greatly appreciated. i'm getting very close to
wrapping 
> this up!
> 
> Andy
> 
> 
> [Non-text portions of this message have been removed]