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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!ncube.com!ncube.com!russell
- From: russell@ncube.com (Russell Randolph)
- Subject: Idle speed won't adjust lower than 1200RPM
- Message-ID: <russell.714075778@ncube.com>
- Keywords: 2.8L V6, idle speed
- Sender: usenet@ncube.com
- Nntp-Posting-Host: db1_pdx
- Organization: nCUBE CORPORATION
- Date: Mon, 17 Aug 1992 18:22:58 GMT
- Lines: 34
-
-
- I have an '84 Chevy S-10 w/ 2.8 liter V6. Just rebuilt the carb. Truck
- has much more power, but the minimum idle speed setting is 1200 RPM! Yet
- the throttle valve appears to be completely closed. Here is what I've done
- to try and find the problem:
-
- - Check mixture via propane enrichment.
- - Check all vacuum connections, including disconnecting one at a time
- and placing finger over carb connection).
- - Check EGR valve (actually plugged inlet to carb to be sure it wasn't
- leaking).
- - Use propane around carb to check for leaks -- found none.
- - Manually closed choke valve to ensure no leaks -- engine died.
- - Rechecked float level -- looked fine but lowered it a little anyway
- (hey, I was desparate!)
- - Ensure choke is completely out (not engaged).
-
- FYI, my carb (Model 17084349) does not have the "hot idle compensator",
- nor does it have the idle solinoid.
-
- Thus, it appears that the air is entering the top of the carb but is
- bypassing the throttle valve. The mixture (according to the propane
- enrichment) is at least close.
-
- Is there possibly some path from inside the carb around the throttle
- valve?
-
- Any help would be GREATLY apprecited!
-
- Thanks!
-
- Russell Randolph
- nCUBE, Beaverton, Oregon
- russell@ncube.com
-