I need Low idle help/adjustment

[Antonio Gomez]

My 2002 Sport Trac runs low idle at 400rpms after warmed up causeing it to sputter. Any ideas how to readjust it. There's no code and the filter and hoses are good. I think it just needs an adjustment. Any ideas?

 

[TRACket Paul]

Clean your IAC first.

Idle

Air

Controller

 

[Yardsale]

The idle typically doesn't just lower "all by itself" - there is a cause and it's not the throttle plate adjustment screw. Adjust this and you will probably mask the problem.



This noted, there is a screw to adjust the position of the throttle plate. On a 2002, it is on the left side of the throttle body. This can be seen in the last three pictures in the attached project. Turn it about one-third rotation at a time.



How long has been occurring? Was there any work done about the time this began? How many miles?



Edit: What Paul suggests - the IAC.

 

[Antonio Gomez]

You guys are great. I'll give this stuff a try and post back what happens. Thanks...

 

[EddieS'04]

Also clean around the throttle blade. You may have build up of gunk restricting air at idle.

 

[Antonio Gomez]

Everything worked. Thanks for your help everyone.

 

[Fernando Gonzalez]

I had the same problem with the funny idle on my '01 ST; followed your advise and everything is fine now.



Thanks, you guys are great!!!

 

[Richard L]

You pro bably need to clean the IAC (Idle Air Control), the Trhottle body, and perhaps the whole intake syste. You can clean the IAC and throttle body with the approriate throttle body cleaner, and the entire intake can be cleaned with a product called Sea Foam.



If you still have problems, you may need to replace the IAC.



...Rich