Acclaim 2.5L AIS motor replacement/adjustment HELP needed

Hello
I have an Acclaim with 2.4L four, that is idling too high. Found no
vacuum leaks. Tested with OTC scanner, idle speed will hover at 1200rpm
even when called for base idle (750). I can increase to about 1400 from
the scanner, but if I ask for more it will not increase. So it is
partially repsonding. I am going to remove AIS motor and clean TB
inside, somewhere I read there is an adjustment on how far the pintle
sticks out of the motor. Anyone know more about this? Any help would be
appreciated. Maybe something common to dodge product.

 

You mentioned nothing about fault codes? Where there any stored? There is no
adjustment for the AIS motor, you put it in and that's it. It may or may not
fix your problem, a faulty TPS sensor or related wiring could cause this and
many other things. The engine controller's driver circuit for the AIS may
also be causing this.
Good luck

Glenn Beasley
Chrysler Tech

 

TPS value is 1.00 at idle and rock stable, linear as I increase. Could
be MAP but that was within range when I looked at the value. There is a
mention about adjusting pintle length to 1" from AIS body prior to
installing, but I am unclear on that. Will look deeper into it later
today. Could be as simple as cleaning pintle seat in TB, if it sticks
it will never manage to regulate properly. Chrysler stealership wants
$100 for AIS, and it is a cheap plastic one. Tempted to pull one off
junk yard and try my luck. Car is perfectly driveable as is, so I am
not too worried, eventually I'll get to the bottom of it. Cheers!

 

Forgot: no fault codes stored or active. And it is a 2.5L motor (not
2.4)

 

I had that engine in my '86 Le'Baron GTS.
I believe there is an adjustment for minimum idle speed only.
I'd look for sticking in the throttle links.
Check if you can reduce the idle speed by pushing the links back to
idle.
I'd be tempted to give the throttle controls a total clean up, before
replacing parts.

 

check out the pcv system really good you could have a internal vac. leak

 

There doesn't seem to be any adjustment for the AIS pintle, except that
the pintle should be in "retracted" position when installing to
throttle body.

Spec. says the pintle itself is in retracted position if the pintle
length is 1" or less out of the AIS motor body. Measurement is from
tip of pintle to base of motor where pintle protrudes from. Don't
forget to ensure you have the O-ring on the pintle before reinstall.