Another TPS or something else?
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Joined: May 2006
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Another TPS or something else?
98 Ranger 2WD Stepside
4 cyl 2.5,112,345 mi.
If I replace the TPS (throttle position senor) again-this would be the 3rd time. The original failed, and I've put in 2 since-so this would be the 3rd. The symptoms are, that it will not idle at the correct speed when shifting between gears and/or coming to a stop. The engine just races-and no amount of slapping the gas pedal will do anything to slow it down. The only thing that gets it back to almost normal-is to put it into 5th and letting out the clutch-until it almost dies. Then it comes back down to near normal-until I have to press the gas pedal again. When I have put in the previous TPS's they seem to fix the problem-but only for a while (the last one lasted from Sept. 2007 until now). My question is "Am I just getting parts from AutoZoned that are bad/questionable-and I should just keep replacing until I find a good one-OR is there some other cause I'm not looking at?" Could it be IAC? I have looked at threads dealing with that and I plan to clean/replace that as well. Thanks for any responses.
4 cyl 2.5,112,345 mi.
If I replace the TPS (throttle position senor) again-this would be the 3rd time. The original failed, and I've put in 2 since-so this would be the 3rd. The symptoms are, that it will not idle at the correct speed when shifting between gears and/or coming to a stop. The engine just races-and no amount of slapping the gas pedal will do anything to slow it down. The only thing that gets it back to almost normal-is to put it into 5th and letting out the clutch-until it almost dies. Then it comes back down to near normal-until I have to press the gas pedal again. When I have put in the previous TPS's they seem to fix the problem-but only for a while (the last one lasted from Sept. 2007 until now). My question is "Am I just getting parts from AutoZoned that are bad/questionable-and I should just keep replacing until I find a good one-OR is there some other cause I'm not looking at?" Could it be IAC? I have looked at threads dealing with that and I plan to clean/replace that as well. Thanks for any responses.
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
There have been issues with the TPS harness connector regarding your year and model:
And yes, I would also suspect the IAC valve, which is responsible for maintaining proper idle during deceleration.
Article No. 00-3-5
HIGH IDLE - TAURUS WITH 3.4L SHO AND RANGER WITH 2.5L AND MANUAL TRANSMISSION
Publication Date: JANUARY 31, 2000
FORD: 1998-99 TAURUS SHO
1998-2000 RANGER
ISSUE:
A high idle may occur on some vehicles. This may be caused by a poor electrical connection at the wire harness (-12B637-) to Throttle Position Sensor (TPS).
ACTION:
Splice into wire harness (-12B637-) just after the TPS with TPS Connector High Idle Service Kit. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
Verify the concern vehicle exhibits a "high idle" condition when depressing the clutch or shifting between gears for the Ranger or when shifting between Park and/or Neutral for Taurus SHO. If high idle condition is not exhibited, proceed with other driveability diagnostic fix procedures. If condition is present, obtain a High Idle Service Kit (XF1Z-15K607-AA) and proceed by following the instructions found within the service kit.
PART NUMBER PART NAME
XF1Z-15K607-AA High Idle Service Kit
WARRANTY STATUS:
Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emission Warranty Coverage
HIGH IDLE - TAURUS WITH 3.4L SHO AND RANGER WITH 2.5L AND MANUAL TRANSMISSION
Publication Date: JANUARY 31, 2000
FORD: 1998-99 TAURUS SHO
1998-2000 RANGER
ISSUE:
A high idle may occur on some vehicles. This may be caused by a poor electrical connection at the wire harness (-12B637-) to Throttle Position Sensor (TPS).
ACTION:
Splice into wire harness (-12B637-) just after the TPS with TPS Connector High Idle Service Kit. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
Verify the concern vehicle exhibits a "high idle" condition when depressing the clutch or shifting between gears for the Ranger or when shifting between Park and/or Neutral for Taurus SHO. If high idle condition is not exhibited, proceed with other driveability diagnostic fix procedures. If condition is present, obtain a High Idle Service Kit (XF1Z-15K607-AA) and proceed by following the instructions found within the service kit.
PART NUMBER PART NAME
XF1Z-15K607-AA High Idle Service Kit
WARRANTY STATUS:
Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emission Warranty Coverage
Thread Starter
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Thanks 97rangerXLT, and Rockledge.
I did change the PCV valve with no results (it was only 1 year old and only 2 bucks). I sse the TPS Connector High Idle Service kit that Rockledge says would be needed. Any idea where I can get such kit?? Is it that the connector gets replaced?
mkford98
I did change the PCV valve with no results (it was only 1 year old and only 2 bucks). I sse the TPS Connector High Idle Service kit that Rockledge says would be needed. Any idea where I can get such kit?? Is it that the connector gets replaced?
mkford98
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
98 Ranger 2WD Stepside
4 cyl 2.5,112,345 mi.
If I replace the TPS (throttle position senor) again-this would be the 3rd time. The original failed, and I've put in 2 since-so this would be the 3rd. The symptoms are, that it will not idle at the correct speed when shifting between gears and/or coming to a stop. The engine just races-and no amount of slapping the gas pedal will do anything to slow it down. The only thing that gets it back to almost normal-is to put it into 5th and letting out the clutch-until it almost dies. Then it comes back down to near normal-until I have to press the gas pedal again. When I have put in the previous TPS's they seem to fix the problem-but only for a while (the last one lasted from Sept. 2007 until now). My question is "Am I just getting parts from AutoZoned that are bad/questionable-and I should just keep replacing until I find a good one-OR is there some other cause I'm not looking at?" Could it be IAC? I have looked at threads dealing with that and I plan to clean/replace that as well. Thanks for any responses.
4 cyl 2.5,112,345 mi.
If I replace the TPS (throttle position senor) again-this would be the 3rd time. The original failed, and I've put in 2 since-so this would be the 3rd. The symptoms are, that it will not idle at the correct speed when shifting between gears and/or coming to a stop. The engine just races-and no amount of slapping the gas pedal will do anything to slow it down. The only thing that gets it back to almost normal-is to put it into 5th and letting out the clutch-until it almost dies. Then it comes back down to near normal-until I have to press the gas pedal again. When I have put in the previous TPS's they seem to fix the problem-but only for a while (the last one lasted from Sept. 2007 until now). My question is "Am I just getting parts from AutoZoned that are bad/questionable-and I should just keep replacing until I find a good one-OR is there some other cause I'm not looking at?" Could it be IAC? I have looked at threads dealing with that and I plan to clean/replace that as well. Thanks for any responses.
Seeing as how the problem seems to clear up for a while after replacing a TPS, why not take a close look at the wiring harness electrical connectors contacts, to see if it's a corrosion, or bent pin/socket problem.
Seeing as how it'll be ok for a while after it's messed with, by plugging in another TPS, sure suggests it may be dirty/corroded contacts.
I also like the idea to clean the IAC, as they seem to be a pesky part, that cause plenty of idle problems.
If all this comes to naught, I'd sure look at the wiring harness rewiring kit in the article Rockledge posted. Your local Ford Dealer should be able to order one.
Let us know how it goes.
Senior User
Joined: Feb 2006
Posts: 311
Likes: 0
From: Ellington, Connecticut
Hi pawpaw,
I concur! There's a few here that really know where its' at including youself!!
There it's out there!!
Dang good post on the TPS article Rockledge.
There it's out there!!
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