Iac

8

88xjand96

NAXJA Forum User

Location

Humble

• Dec 13, 2005

• #1

I have a 88 XJ with the 4.0, MPI engine. Is the Idle Air Controller located on the throttle body adjustable. The reason I ask is I replaced mine and had trouble with the engine stalling, then I removed it and notived the valve disc could be unscrewed to extend further into the throttle body.

 

casm

NAXJA Forum User

Location

Oklahoma

• Dec 13, 2005

• #2

88xjand96 said:

I have a 88 XJ with the 4.0, MPI engine. Is the Idle Air Controller located on the throttle body adjustable.

Click to expand...

If I'm not mistaken, the IAC on the 4.0 is located on the top of the intake manifold; which side depends on the year. Are you sure you aren't referring to the TPS?

Not trying to be pedantic, just want to make sure we're talking about the right thing here.

 

8

88xjand96

NAXJA Forum User

Location

Humble

• Dec 13, 2005

• #3

on mine it is located right next to the TPS, on the other side is the an adjustment for the butterfly, and a cable

 

G

gjxj

NAXJA Forum User

Location

ohio

• Dec 13, 2005

• #4

no, it is not adjustable. The stepper motor turns that screw to adjust it automatically.
(I suppose if its dead you could manually adjust that way..)

If you do mess with it make sure you don't extend it so far that it
hits the seat when you re-install.

 

T

TickDontPick

NAXJA Forum User

Location

Arizona

• May 11, 2006

• #5

I had to adjust mine when I installed a new one, to extend just pull, to shorten pull then springed part down and twist the top.