Question about 1986 Chevrolet Cavalier 2 Door
How do i adjust the idle speed on my 1986 cavalier 2.0L 4 cyl.?
While looking at the engine from in front of the car with the hood up..
Locate the TBI assembly ( follow the air intake tub from the cor support back. It leads directly to it ). Next look on the lower left side of the TBI just above the throttle linkage connection to the TBI.
you will see what looks like a little molded bullet sticking off the side with a screw sticking out of it making contact with the linkage assembly. On the back side of that little bullet you will see a torques head type screw head. adjust that forwards to increase idle speed or back it off to lower idle.
If you have a high idle condition the chances are it is not due to the idle set screw. Its more then likely either deteriorated vacum lines, deteriorated TBI gasket or a bad Air Idle Control Motor ( IAC ).
If you adjust the screw and nothing happens worth noting then check the vacum lines and replace. If nothing happens still then change the TBI gasket where it mounts to the intake.
If that doesnt do it then your left with the more costly option of changin out the IAC for a new one. They run from $75 - $125 depending on where you shop.
If after you change the IAC and it is still acting out then you may have an intak emanifold leak, or a head leak.
Posted on May 01, 2009
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Sep 12, 2015 | 1995 Toyota Camry
Feb 02, 2015 | 1986 Toyota Cressida
Dec 24, 2013 | 1986 GMC C1500
Mar 14, 2010 | 1986 Suzuki Samurai
Sep 19, 2009 | 1986 Nissan Pickup 4WD 1986
Aug 18, 2009 | 1986 Mitsubishi Starion
Jul 04, 2009 | Oldsmobile Alero Cars & Trucks
Jun 04, 2009 | 1993 Mazda RX-7
Mar 06, 2009 | 1988 Isuzu Pickup 2WD
Jul 27, 2008 | 1984 Isuzu Pickup
407 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: