Almost forgot the dealer around here (Cape Fear Land Rover) Will charge 99.00 to plug it up no matter what you think the problem is and then more to fix the problem

 

Hey try this:



First remove and clean the idle motor and the port it screws into. Clean the throttle body as well.

On the top of the throttle body you will see a hole (possibly covered by an anti tamper plug) for the base idle adjuster.

Remove the air bypass hose from the throttle body, which will cause the engine to speed up to 2500rpm or so. Unplug the connector to the idle motor after 5 seconds then reconnect the hose.

Squeeze the hose shut with needle nose vise grips and adjust the base idle using an allen wrench to give an idle speed of 6-700rpm. Get the lowest speed you can that gives smooth running and does not stall when blipping the throttle. Screw in for slower idle, out for faster idle.

Reconnect the idle stepper and remove the vise grip and you should be done.

I set my base idle to 1100 to keep it from stalling out when stopped at red lights, but it idles smoothly, and will not stall now. I have a 1995, and i'm not sure if this works on 4.0 engines

 

Again, you can't set base idle in a 96 and newer. Only 94-95 with a distributor.

 

Haven't gone yet. My appointment is on Monday. For now I've just unplugged it and it's running fine, but I'm gonna get it fixed.

Eric

 

Well I just got back from an indy shop that reset the base idle.... and found a list of codes. He is wondering why all these codes didn't turn on the CEL. It comes on then goes off after start up, like it should, but I might have a computer issue.
Here are the codes:
P1508 - Idle Air Control Open Circuit (probably because it was unplugged)
P0102 - MAF Circuit
P0138 - O2 Sensor High Voltage Bank 1 Sensor 2 (reading steady @ 5.1)
P0300 - Random Misfire
P1316 - Misfire Causing Excess Emissions
P0125 - Low Coolant Temperature Closed Loop

He cleared the codes and I'll check later to see what comes back.

Eric

 

Didnt you just do a tune up? If I remember right you did the tune up and cleaned the throttlebody and that is when your problem started.
Please correct me if I am wrong, I have alot of empty space between the ears so I may be mistaken.

 

The idle was always a problem even for the previous owner. It was getting progressively worse. That's why I replaced the plugs, wires, fuel filter, pcv, air filter, vacuum hoses. Then I did induction cleaning and used 2 cans of carb cleaner on the intake and stepper motor. After all that, I decided it was time to replace the stepper motor.
On a side note, it was kinda neat to see him hook up the computer, push a few buttons and watch the idle go right to 750rpm. And a smooth idle too!!! It didn't idle that smooth before, even with the stepper motor unplugged.

Eric

 

how much $$$?

 

$50 for setting idle, pulling codes and clearing them. A lot better than the dealer!!

Eric

 

WOW... is it a chain? or is it just a shop... give em a plug