Drivability Issues Due to Faulty Throttle Position Sensor on Jeep Wrangler

Problem Description and Possible Solution

The throttle position sensor (TPS) may fail causing intermittent drivability problems like hard starting, stalling, and/or hesitation when accelerating. A failed TPS will require replacement, proper diagnoses should always be performed before replacing any parts.

Problem Data
RepairPal Verified
Average mileage: 97,019 (7,000–170,000)
20 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2012, 2013, 2015
90 people reported this problem
Viewing 1 - 20 of 29 comments
MY PROBLEM IS THAT THE JEEP CRANKS OVER BUT TAkes a long time to start, sometimes i have to press on the gas pedal to get it to start, It is a 91 wrangler with the ho 4 liter haven't found the problem yet anyone have any idea's how to fix this ? my thought was cps ????
Still having this problem.... My jeep Rubicon 4.0 will have the idle rev up to 3000 rpm then back down to 900 rpm then back up then down several times and my foot is not on the throttle... It will start to do this when in gear running down the street and it is noticeable to the peddle. When you take your foot off the peddle the idle accelerates to 3000 rpm and you can't shift.... I replaced the throttle positioning censor twice already, and it still does it. I asked Jeep to flash the computer, which was replaced, and programmed in 2010 by Jeep.. but they tell me it can not be flashed... They say they can diagnose the computer for problems but it's $50.00 and i know it will not show up in the code as I have already done this in the past..... It seems to do this when the blower motor for the heater/defroster is on..... But it will also do it in the summer when air conditioner is on... Is it possible the problem is in the blower block resistor ? Hunted Jeep 2003 Rubicon
Hesitant to start. Rough/ low idle rpm. Bucking under acceleration. Problem didn't start until it started raining outside.
It was running fine and than started backfiring and was undrivable.Turned off and it wouldn't start. Cleaned fuel rail and injectors. This seemed to fix problem. Went to get seal (front drive-line) now it surges consistently. It idles fine, but surges when gas pedal is held down (higher rpms).
I had this checked out by a mechanic and all the codes say that this is the problem. I would like to know how much this will cost?
Heavy bucking upon modest to hard acceleration from a stop, on level ground or heading uphill. Occasionally in second gear accelerating.
Vehicle continues to accelerate for a few seconds after letting off gas pedal. Checked the connection at the throttle and the cable/throttle body is not sticking. If you push in the clutch and hold it for a second while shifting the vehicles rpms increase with out hitting the accelerator.
My vehicle will sometimes stall at 25mph or 50mph and I will have to slowly accelerate to get it over those certain speeds. The check engine light comes on but will never capture a code
No power... Jeep seems to want to stall after put into drive. Feel like I need to step on gas to rev the engine to get it normal. Only happens once in a while.