What's the name of the part?

[ricksjeepster]

I been having a problem with the MJ , when I'm at a stop in a red light the engine begins to accelerate like its gonna blow away, i saw one day that the cable of the accelerator and the little round black thing start to twist and that's when the engine accelerates to the limit.

I'm guessing this sensor coul be the reason since it connects direct to the piece that makes the weird twisting, if you guys think this is the problem ,please tell me the name of it

here's a pic

 

[bigd44889]

i think it is called the idol contol something or other

it controls your idol

[BLHTAZ]

It's called an ISA Motor (Idle Speed Actuator). Below is the procedure from the FSM to make sure that it is properly adjusted...and yes, it could be the cause of your problem.

 

IDLE SPEED ACTUATOR (ISA) MOTOR

1) Adjust ISA motor plunger to establish initial position of

plunger only if motor has been removed or replaced. Remove air filter

elbow and start engine. Run engine until engine reaches normal

operating temperature. Turn A/C off (if equipped).

2) Connect tachometer leads to diagnostic connector D1,

attaching negative lead to terminal D1-3 and positive lead to

terminal D1-1. See Fig. 4. Turn ignition off. ISA motor plunger

should move to fully extended position.

3) When ISA motor plunger is fully extended, disconnect ISA

motor wiring connector and start engine. Engine speed should be

3300-3700 RPM. If incorrect, turn hex head screw at end of plunger to

provide engine speed of 3500 RPM.

4) Fully retract ISA motor by holding closed throttle (idle)

switch plunger inward as throttle is opened. Closed throttle switch

plunger should not touch throttle lever in closed position. If

contact is made, check linkage and/or cable for binding or damage.

Repair as necessary.

5) Connect ISA motor wiring harness connector and turn

ignition off for 10 seconds. ISA motor should move to fully extended

position. Start engine. Engine speed should be 3500 RPM for short

period of time and then decrease to normal idle speed.

6) Turn ignition off. Disconnect tachometer. After final

adjustment of ISA motor, use thread penetrating sealant (Loctite 290)

on adjustment screw to prevent movement and maintain adjustment.

NOTE: If adjustment screw must be moved after thread sealant

hardens, loosen threads by heating screw with flameless heat

such as soldering gun. DO NOT use flame or torch type of

heat as damage to ISA motor will result.

[ricksjeepster]

Thanks bigd44889 and Blhtaz! I`ll the checking it this afternoon, by the way do you know if any of the autoparts stores have this ISA? or is it a must order from the dealer thing?

Just in case i should buy it

[BLHTAZ]

I did a couple quick searches on Rock Auto NAPA & AutoZone, but found nothing there.

The Chrysler part# is 83502375 ... but ... that thing is $250 through a dealership :eek: so you will probably want to do what you have to in making sure that it is your problem.

 

Please be advised that I am making ASSumptions here (based on your picture) that you have a 2.5L engine and it is older than 1989

[Sir Sam]

i think it is called the idol contol something or other

it controls your idol

 

LOL @ Idol.

[brdhntr]

listen to BLHTAZ, he's right. :agree:

 

it is a little harder to find it at a reasonable price. i don't know that i'd trust a used one from the jy. if the jy has a rig that hasn't been sitting too long with the hood open, and the part looks to be in good shape, i'd ask the jy for a limited guarantee that it's a good part. the ones around here will let you take it home and give it a try, if it doesn't work, you can try another or take store credit. anytime you're going to a jy for an electrical part that they can't test, it's best to ask for this. if not, see if they'll let you plug it in in the parking lot to make sure. buying electrical parts at a jy is a crap shoot. unfortunately, it may be your only option for the part at a reasonable price.

[ricksjeepster]

DAMn!!!

 

250?

for a hundred more maybe i could find an entire engine jajaja

well, a friend told me that he saw an XJ in a near jy with the same engine and looks like its the same model and it was hit only from the passenger side so ill give it a try, I'm just hoping i can get a good price, I'll let you know what happens and once again guys thanks for the help!

 

Rick

[bigd44889]

if not let me know i have one on my spare motor i can part with

don't laugh at me i was tyird lol and typeing in the dark and i can't type or spell :smart: