How to set idle for 1984 mustang 3.8L, 6cyl

You need to reset the idle. I have an 06 Pathfinder and anytime I clean the TB it messes up some volumetric calculation and I have to go through a relearn procedure. Seems similar on your Mustang. The removal of junk allows extra air to flow through and the system needs to be reset.
Try this link: http://sbftech.com/index.php/topic,1031

use a multi volt meter and check the reading on your tpi throttle position sensor it could be out of adjustment and also check your idle air solenoid and check the egr valve to make sure its not sticking.most likely one of the 3.you can find the volt setting for the throttle position sensor on you tube as well.hope this helps

try to advance the timing a little!
with the distributer. 1 deg. should be good. get a timing light

check/replace your idle air control valve.

Hi

You need to check if the Idle control jets are set properly, these are the 2 screws near the base plate on this type of carburettor.

Screw them fully in, then on the primary side screw it out 2.5 turns.
On the secondary side screw this out 1.75 turns. This should get your idle up.

If this dosn't work then you have got problems with the idle jet system which means you need to pull the emulsion tubes out and jets out to clean them.

Also check that your Idle screw is screwed in enough to allow the throttle to be open enough to idle.

Hope this helps

Thanks

Jason

On a 1984 Toyota I would look for a screw to set the low speed idle on the carburetor, if so equipped. Turn the screw until the RPMs are reasonable.

If you can maintain a smooth idle by adjusting the screw your home free.

If not, then there could be other problems with your vehicle's emission, ignition, comprression, or fuel.

You need to describe a bit more about the problem. How fast does it heat up? Does it only overheat when you are at idle or when driving? Any recent work done to the car.
Engine size?

sounds like a fuel problem.

ensure there is gas and check to see in the fuel pump is working.

but your problem is deffiniately in the fuel system!

Replace your fuel filter.

check the vacuum from the motor??? slow oxy sensor slow to the ecu to go lean when in idle..