Register free!
Search
 
     

The Green Industry's Resource Center


Click for Weather
Reply
 
Thread Tools Display Modes
  #1  
Old 03-10-2000, 11:45 AM
4LOW
Guest
 
Posts: n/a
Hey all, I have an 86 S10 2WD w/2.5<br>4 cylinder $ EFI. It has an erratic<br>idle that's on the high side and it<br>races a lot. When I give it a quick<br>stomp it'll drop down to a lower rpm<br>that is still a little too high. I suspected<br>a vacuum leak but can't find one. Thanks<br>for any help.<br>4LOW
Reply With Quote
  #2  
Old 03-11-2000, 08:25 AM
John DiMartino John DiMartino is offline
LawnSite Silver Member
 
Join Date: Jan 2000
Location: Walden,NY
Posts: 2,555
After you have checked all the vac lines,spray some carb cleaner under the TBI unit.If it races more,the gasket is likely blown out.It is cheap and easy to change,they go a lot.If that doesnt do it,pull out the IAC motor,the one with 4 wires on a square connector,and a big 1 1/4&quot; hex head.Clean carbon out of motor and seat inside of TBI unit,reinstall.The IAC may be bad,but you wont know without a scanner.Take it to a mechanic if all those fail to fix it.<p>----------<br>John D<br>
Reply With Quote
  #3  
Old 03-12-2000, 11:23 AM
yortengel yortengel is offline
LawnSite Member
 
Join Date: Mar 2000
Location: Clawson, Mi
Posts: 216
If you cant find a Vacuum leak, you can check the operation of the IAC motor, you need to turn the ignition on, engine off. (KOEO) jumper the A to B on the ALDL (this is the connector under the steering column) then with the air cleaner off watch the pintle of the IAC motor move in and out of its bore in the Throttle Body. if it moves the the circuit is ok. If its not moving then I recommend that you check out A manual from the library, It should have a complete procedure on how to check minimun idle speed and IAC operation. I you start getting in over your head the take it to the dealer.<br>Good Luck.<br><p>----------<br>Troy L Engel<br>
Reply With Quote
  #4  
Old 03-16-2000, 04:10 PM
4LOW
Guest
 
Posts: n/a
thanks guys, you were right. i changed<br>the iac & tbi gasket, the intake was<br>choked up with lots of carbon, it was<br>an easy fix.<br>4LOW
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump





Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ©1998 - 2012, LawnSite.comô - Moose River Media
All times are GMT -4. The time now is 04:09 PM.

Page generated in 0.06630 seconds with 7 queries