Is there and idle screw?

Cheryl353 · Jul 6, 2016

Is there an idle screw on a 98 with a 5.2 318? Thanks for any help in advance.

tomk · Jul 6, 2016

Nope.

MWeed · Jul 6, 2016

Idle is controlled by the pcm. Generally @ 600 rpm or so with A/C off and @ 850 with it on. If not idling then time to clean the circuits in the TB and clean or replace the IAC.

Cheryl353 · Jul 7, 2016

There appears to be a screw that the throttle sits on but, there is no head. The other side is just a flat plate.

tomk · Jul 7, 2016

nope.

the PCM controls the idle speed. Period. *some* throttle bodies have a minimum-airflow factory adjustment, but that does not affect the idle speed (but if you muck with it you CAN cause an CEL code)..

What is the problem we're trying to solve?

Cheryl353 · Jul 25, 2016

it was idling at about 1000 rpms but, I had a mechanic at work look at it and he got it back down to 700 where it usually idled

cobra31669 · Jul 26, 2016

HOW DID UR mechanic fix ur idle problem Cheryl353

tomk · Jul 26, 2016

might have been a vacuum leak? that's a common cause of idle-too-high.. should pop an OBD code though..

cobra31669 · Jul 28, 2016

tomk said:
might have been a vacuum leak? that's a common cause of idle-too-high.. should pop an OBD code though..

I have a p0505 keeps coming on we checked for vacuum leaks and couldnt find anything

tomk · Jul 28, 2016

Bad battery can cause a p0505 FYI.. adaptive idle settings get lost and the PCM decides it can't control the idle.. What are the symptoms (aside from the code)?

Is there and idle screw?

Cheryl353

tomk

MWeed

Cheryl353

tomk

Cheryl353

cobra31669

tomk

cobra31669

tomk

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