idle keeps wanting to go higher

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03-06-2004, 09:13 AM

hjsouders

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idle keeps wanting to go higher

73 240- car seems to want to idle high at around 2000 rpms but if i tap the gas quickly the car will return to normal 1k idle.

seems like it may be getting progressively worse

an ideas?

03-09-2004, 10:22 AM

OlderThanMe

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mabey your choke gets stuck open, try some carb cleaner

03-09-2004, 10:23 AM

Bleach

The Evil Twin

Join Date: Mar 2001

Location: Seattle, WA

Posts: 9,294

My idea is sticky throttle linkage. You've got quite a linkage setup with the dual SU's there. Disasemble it and clean it with WD-40. Dry it and apply small amounts of grease inside each of the ball in socket joints. Then, maybe add a slightly stronger throttle return spring or put a second one on. I've seen many multi-carb setups with two throttle return springs spaced out on various points of the linkage. This will also give the gas pedal a slightly more firm feel.

03-09-2004, 10:24 AM

OlderThanMe

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or your gas linkages are stickey and need to be cleaned. windex and paper towels will work

03-09-2004, 10:26 AM

OlderThanMe

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wow bleach... we think the same thing at the same time in different parts of this huge country... amazing

03-21-2004, 07:01 PM

Biggs

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Leaks

Check for intake leaks. In particular, the throttle shafts or carb gaskets are likely culprits. These can cause erratic idle that can be "bumped" up or down with a quick tap on the foot feed.

04-07-2004, 09:06 PM

melloyello

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I think everyone here has the right idea. When it gets stuck see if you can physically move the butterfly or the linkage and make it stop. If not it isn't in either of those. Then, you would be looking for some other intake leak. An easy way to find if you are sucking air in somewhere is to spray starting fluid where you think the culprit is. If there is a leak, the engine will speed up just like spraying it into the carb.

04-08-2004, 01:49 PM

Bleach

The Evil Twin

Join Date: Mar 2001

Location: Seattle, WA

Posts: 9,294

Quote:

Originally Posted by OlderThanMe

wow bleach... we think the same thing at the same time in different parts of this huge country... amazing

I think you deserve to be the 240Z Forum Moderator!

04-26-2004, 06:04 PM

OlderThanMe

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I am too busy

Quote:

Originally Posted by BleachZee

I think you deserve to be the 240Z Forum Moderator!

I would like too but I am too busy w/ school and my first job and working on my z that I sometimes have 2 or 3 weeks before coming back too this wonderful site. Thus the reason that I have not been here in a long timeand am replying so late