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914World.com _ 914World Garage _ idle too low when warm ...

Posted by: SirAndy May 31 2005, 11:26 PM

my idle is too low when warm, cold idle is perfect ...

now i'm not a carb guy ...

should i just turn up the idle so it's a bit high cold but ok warm? is that how it works?
Andy

Posted by: redshift May 31 2005, 11:29 PM

Yes... that would work, or you could adjust it when it's cold, then again when it's hot... everytime.

M

Posted by: SirAndy May 31 2005, 11:32 PM

QUOTE (redshift @ May 31 2005, 10:29 PM)
Yes... that would work, or you could adjust it when it's cold, then again when it's hot... everytime.

you think there would be a market for a cockpit adjustable idle for dual carbs ???
Andy

Posted by: Dr. Roger May 31 2005, 11:38 PM

I used to run a well worn Holley in a pumped up Chevelle that did that also.

My auto shop teacher looked at it and deduced the butterfly valve was gummed up a little and worn. It was an old beater carb but after taking the thing apart and cleaning/fine tuning the throttle plates, it actually cleared up.

dont know if that helps but there's my 2 cents.... =-)

Posted by: Joe Ricard Jun 1 2005, 04:56 AM

Well it could be thatyou have a vacuum leak cold and once the motor heats the leak is sealed. Ah never mnd I think I just pulled that out my ass. I just really don't know unless I got to tweak on it. Obviously something is askew if you run through the entire carb synch thing I wrote yesterday that might fix it.

Posted by: ArtechnikA Jun 1 2005, 05:01 AM

QUOTE (SirAndy @ Jun 1 2005, 01:32 AM)
you think there would be a market for a cockpit adjustable idle for dual carbs ???

Porsche thought so when they added the hand throttle lever to the /6's ...

that's what it's for - adjust idle warm, keep it running with the hand throttle. if yours is idling perfectly cold and too slow hot, you might want to kick back a size on the idle jets or turn in the idle mixture screws "some" ...

Posted by: rhodyguy Jun 1 2005, 07:49 AM

if your car idles a bit high when cold and settles down to 900-950 when warm, i'd say you're good to go andy. no sneezing thru the carbs?, no back firing?, tanish plugs?, drive on man.

k

Posted by: nebreitling Jun 1 2005, 07:53 AM

if it raises more than 200 or 250 rpms cold to hot, you might have a problem. other wise, adjust it a bit and drive on.

i've got a sync tool if you need it.

Posted by: rhodyguy Jun 1 2005, 08:08 AM

i'd like to know the trick to getting the car to idle a bit high when cold and settle down when warm. just like f.i. . i have to feather the pedal on cold start up. mine works the opposite, low cold idle climbing to 950 or so when warm.

k

Posted by: nebreitling Jun 1 2005, 09:55 AM

you're right. dyslexic flare-up!!! edited my post.

Posted by: rhodyguy Jun 1 2005, 10:30 AM

it was early in the am. check this out. note the chevy electric door lock acutator(?). .

k

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Posted by: Aaron Cox Jun 1 2005, 10:36 AM

electronic chokes?

very cool!