post #1 of Old 11-05-2011, 11:19 AM Thread Starter
bluedaffy
Registered User
1989 YJ Wrangler 
 
Join Date: Oct 2011
Location: Stevens Point
Posts: 284
Idle setting problem

My idle screw doesn't seem to want to consistently return all the way to the idle bar (the stop for the idle screw) on a 4.2L YJ. Does anybody know of a reason as to why it wont return all the way? does it need greasing? new springs?

*More information*
This happened when I went to turn down the idle, it had been idling at around 1200 rpms and wanted something more around the 800 rpm range. When I screwed down the idle screw it still returns to the 1200 rpm range because the screw isn't pulled all the way to touch the stop plate.

Thanks!

bluedaffy

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post #2 of Old 11-05-2011, 02:34 PM
kahanabob
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1992 YJ Wrangler 
 
Join Date: May 2010
Location: Maui
Posts: 507
can you push on it to make it touch the stop plate? if so then maybe a new spring or adjust it for more tension.....if not then something else is interfearing with it.....
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post #3 of Old 11-05-2011, 03:26 PM
jsawduste
Web Wheeler
2006 YJ Wrangler 
 
Join Date: Jul 2006
Posts: 3,546
Sorry but your posts just don`t make sense.

You state you have a 91 YJ but in your profile you call it a 4.2.
The two engines 4.0 and 4.2 are two different animals .....Thus the engine controls are two totally different between the years.

The 4.0 (standard in 91 and up) is an OBD 1 fuel injected.
The 4.2 (standard 87-90) is a Renix (Renault and Bendix) controlled system with a Carter carburetor.

What do you have ? If you don`t know at least post a picture and we can figure it out.
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post #4 of Old 11-05-2011, 04:44 PM Thread Starter
bluedaffy
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1989 YJ Wrangler 
 
Join Date: Oct 2011
Location: Stevens Point
Posts: 284
The engine is a 4.2 but in a 91 tub
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post #5 of Old 11-05-2011, 06:00 PM
jsawduste
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2006 YJ Wrangler 
 
Join Date: Jul 2006
Posts: 3,546
Quote:
Originally Posted by bluedaffy View Post
The engine is a 4.2 but in a 91 tub
OK, then is it a RENIX or OBD1 controlled ?

Or is it a stand alone carb/distributor set up ?

If the latter then what carb and dist ?

Sorry to ask so many questions but the JF wrecking crew can`t give you good advice if we don`t know the game.

Reply here and fill out your profile with the information for future reference.
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