1997 Ford Taurus Stalls When Stopping

1997 FORD TAURUS
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KT6BUG
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When I first start driving my car, it stalls whenever I have to stop. After about an hour of driving it like this, it no longer stalls but when I stop I can feel the engine jumping. Could this be an oxygen sensor, fuel filter or something else?
Mar 14, 2007 at 4:41 PM
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SERVICE WRITER
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Mileage? Motor size?
Any check engine light?
Last set of wires & plugs?
Mar 15, 2007 at 12:32 AM
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KT6BUG
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I've got a 3.0L V6 engine. The car has about 130,000 miles on it. I've owned the car since September of 2005 and the check engine light has been on at least since then. We just replaced all the spark plugs in December 2006. I dont know about the wires, I dont think they have been changed since Ive had the car. We've checked the codes for the check engine light and the only thing that comes back is the transmission, which was replaced in february of 2006.
Mar 15, 2007 at 3:09 AM
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SERVICE WRITER
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Need the code numbers to possibly elaborate. There may be a transmisision control issue?
Mar 15, 2007 at 10:56 AM
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KT6BUG
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0430--catalyst system efficiency is below threshold for the current engine operating conditions

0141--a malfunction exists in the heater circuit for oxygen sensor 2 in bank 1

0136--a malfunction exists in the electrical circuit for oxygen sensor 2 in bank 1

1742--torque converter clutch solenoid failed on

0122--the input from the throttle position sensor is lower than expected for the current operating conditions


Those are the printouts I got from Auto Zone, but I'm not sure what any of it means or how to fix it.
Mar 17, 2007 at 3:38 PM
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TAURUSWHEEL
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Any chance the wiring is crossed up between any of your o2 sensors?? Exhaust leaks in the cat area? Could be the o2 sensor is bad or broken also. Make sure the wirng harness for that sensor is good. The 0122 code could be an issue with operation of the tp sensor wiring, the tp sensor itself or the pcm.. as for the 1742, the torque converter may be locked on which would cause stalling and harsh shifting,, electrical, mechanical, or hydraulics issue.. who did the trans work??? Any warranty?
Mar 17, 2007 at 6:09 PM
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KT6BUG
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I'm not sure what most of that means....I don't think the wiring in the o2 sensors could be messed up since I dont think theyve ever been messed with. The tranny work was done by my mom's boyfriend. He's a mechanic but there's no warranty or anything, something in the tranny broke so all he did was repair that....
Mar 17, 2007 at 6:13 PM
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SERVICE WRITER
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Regarding the O2 sensor codes, since there are 2 different failures on the rear sensors and one points to the right rear one, I would either check the o2 sensor wave form if you can, or replace the right rear sensor. Like Tauruswheel says, exhaust leak it possible on that as well. The rear o2 sensor is measuring how well that converter is working. If air is getting in from a leak in front of it, the o2 content will be askew.

Regarding the trans code, I would check the TCC harness for being loose or damaged, pull on it gently to see if it feels like it's tight. If it is remove it and inspect it. What trans work was done?

Tauruswheel covered the TP sensor issue, "probably" a bad tp sensor, but....really need a scanner to do testing on it as far as I know.
Mar 17, 2007 at 11:20 PM

Suggested Repair

Diagnose the stored codes rather than guessing one part. For the rear bank 1 oxygen-sensor codes, inspect the sensor wiring and check for an exhaust leak ahead of the sensor; if those are sound, replace the right rear oxygen sensor. For the torque-converter clutch code, inspect the TCC harness for looseness or damage, since a locked converter can cause stalling. Test the throttle-position sensor, its wiring, and the PCM with a scanner before replacing the sensor.

Conversation Summary

A 1997 Ford Taurus 3.0L with about 130,000 miles stalls when stopping after startup, then runs without stalling after extended driving but still feels like the engine jumps at stops. The check-engine light has been on for a long time, and stored codes point to catalyst efficiency, rear bank 1 oxygen-sensor circuit and heater faults, a torque-converter clutch solenoid stuck on, and a low throttle-position-sensor signal. Experts recommend checking oxygen-sensor wiring and exhaust leaks, possibly replacing the right rear sensor, inspecting the TCC harness, and scan-testing the throttle-position sensor circuit.

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