kickin_wayne

i have a surging problem that happens in between 3rd gear and 4th gear. i dont try to go fast but at a steady speed the Jeep starts surging. i know i need to replace the spark plugs and distributur. could these be the problem or is there something else i should look at?

xjjeepthing

Possibly a Throttle position Sensor

BlueXJ

Wayne first clean the carb with some choke cleaner. Try that first. Maybe some seafoam. The plugs would be nice but the spark is not going to change in magnitude, thus is probably not related to the surging.

COSXJFAN

Check for faulty accelerator pump and or linkage, they can cause that as well!! That carb is pretty old. Has it seen a rebuild yet?? Might be time for that, IMHO. HTH!!

kickin_wayne

yea ive rebuilt the carb maybe about not even a month ago. where is the throttle position sensor?

xjjeepthing

http://www.teamcherokee.com/Fuel_System/index.html

Should be right on the Carb.
Featured Item: Throttle Position Sensor XJ 2.5 Liter 1984-1990
This is a quality replacement throttle position sensor. This sensor will fit all Jeep Cherokees and Comanches from 1984-1990 with the 2.5 Liter engine.This throttle poisition sensor will cause hesitation on acceleration when it is bad. Installs in minutes.Save money now at this great price and on mileage.

kickin_wayne

alright ill look for one of those here. thanks

BlueXJ

Wayne it will be obvious on the carb. If you will shoot us some opics we can help you a little more. It has been awhile since most of us have worked on anything with a carb except our lawnmowers. LOL

kickin_wayne

will do as soon as i can.

kickin_wayne

alright here are some pics if this dont work someone explain cuz this is the first time ive ever tried putting pics up

BlueXJ

Pics worked but are off by 90 degrees I got a crink in my neck lookin' at 'em. Follow the wires to the TPS is all I can say. Should have three wires to it and a plug right on the TPS itself. (Look at the pic that xjjeepthing posted)
Replace and adjust it and you should be good to go. Don't ask me about adjusting a carb TPS as I have never even seen one.

kickin_wayne

where the hell is this part im looking for it right now and dont see anything similar to it. is it located near the carb or what?

BlueXJ

Has to be mounted on the carb itself to get the term throttle position sensor. Maybe you can get more info from xjjeepthing. PM him!!

kickin_wayne

will do thanks

xjjeepthing

Im trying to find some more info. Not seeing it. I do know that they changed the fuel system mid year 85