i Just bought a 1993 Taurus. It is giving me a little trouble - Page 3 - Taurus Car Club of America : Ford Taurus Forum
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post #21 of 58 (permalink) Old 04-12-2019, 02:19 PM
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Check under the passenger windshield cowling.
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post #22 of 58 (permalink) Old 04-12-2019, 03:59 PM Thread Starter
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I found it. It was behind the glove box. I went to the wrecking yard and compared mine to one that came out of an identical vehicle. Same motor, same tranny, same trim package. It was even the same color. I compared the numbers and letters on the two PCMs. They were close, but they weren't exact. I'm going to list the letters and numbers. I'm going to bold the differences because there wasn't a simple three letter or number code like was described to me. Here we go. I'll start with the on from China first. 2F3A26 A2D2 EEC-IV GSKT NPF 3R262 *C27B385D4T7G* SMD-113 F20F-12A650-CC Now the one from the wrecking yard 2B2L06 A2D2 EEC-IV GSKT NPF 2L062 *C27B385CCFNP* SMD-113 F20F-12A650-CC
The computer from the wrecking yard says Ford on it. The one in the car doesn't. That could be from China's re-manufacturing process though. The car runs. Could these small difference be the reason it runs rough though.

ALSO: Do I need to do anything special before I put the new computer in the car.
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post #23 of 58 (permalink) Old 04-13-2019, 04:48 PM Thread Starter
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Well it isn't the computer. I put the one from the wrecking yard in it, and it still has the stumble/miss. I've tuned it up. replaced the fuel regulator and put another computer in it. I've looked all over the engine compartment 3 times for a vacuum leak. The only thing I have left to try is the throttle position sensor. Does anyone have any other ideas I haven't tried or thought of.
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post #24 of 58 (permalink) Old 04-14-2019, 05:41 AM
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The idle/stumble -stalling sounds a lot like what my 2001 was doing, but I had different codes than yours.


Among other things, I replaced the DPFE sensor. I think that was likely the main culprit on my car. It's a small and inexpensive part, but a little hard to get to as it's behind the intake manifold. When I replaced mine the two tubes on the part (plastic) snapped off in the rubber tubes that transition to the metal pipes. I took those off and was able to clear the old plastic tubes out with same diameter screw drivers. Those two rubber joiner tubes are different diameters and lengths, so keep them oriented.


"I was told" by my brother in law, a mechanic told him an intake manifold leak was causing the issue. I replaced those gaskets at the same time as the other work. Those are also inexpensive and relatively easy to replace.

Last edited by 60DRB; 04-14-2019 at 05:44 AM.
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post #25 of 58 (permalink) Old 04-14-2019, 07:30 AM
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93 has PFE, not DPFE, but the still fail but typically set a code when they fail.

I am still thinking vacuum leak you havent found. UIN / LIM leaks are rare with the aluminium lower and upper intakes, but not unheard of.

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post #26 of 58 (permalink) Old 04-14-2019, 08:35 AM
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Quote:
Originally Posted by Jeff K View Post
93 has PFE, not DPFE, but the still fail but typically set a code when they fail.

I am still thinking vacuum leak you havent found. UIN / LIM leaks are rare with the aluminium lower and upper intakes, but not unheard of.

On my 1993 I had a stumble returning to idle which did not set a code. It turned out to be the six inch silicone hose to the PFE. There is an outside chance that the sensor is just not right. I was wondering if he could disconnect the vacuum hose from the EGR valve to temporarily have it closed and see it the car stumble. Maybe also clean/check the valve.
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post #27 of 58 (permalink) Old 04-14-2019, 03:19 PM Thread Starter
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Automender12345 was right. It was a vacuum leak. I found the PFE sensor and the hose connected to it had a hole in it and was completely clogged. I fixed it and the stumble is much better. I can't tell if it's completely gone. I need to drive, but I can't because it's kinda blocked in. I think it is gone, and my mind just won't accept it. I wanna thank everyone for all the help I've been given. It is greatly appreciated. Thank you.
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post #28 of 58 (permalink) Old 04-14-2019, 03:26 PM
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Quote:
Originally Posted by rickyd123 View Post
Automender12345 was right. It was a vacuum leak. I found the PFE sensor and the hose connected to it had a hole in it and was completely clogged. I fixed it and the stumble is much better. I can't tell if it's completely gone. I need to drive, but I can't because it's kinda blocked in. I think it is gone, and my mind just won't accept it. I wanna thank everyone for all the help I've been given. It is greatly appreciated. Thank you.

You can't use regular vacuum hose there since it gets to hot and will melt. It was a special silicone hose that cost me $13 for eight inches 20 years ago.
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post #29 of 58 (permalink) Old 04-15-2019, 09:34 AM Thread Starter
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I bought the special hose. It cost me about $15. Not to much inflation for 20 years later.
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post #30 of 58 (permalink) Old 04-16-2019, 08:41 PM Thread Starter
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WELL it's Not Fixed. I took it for a drive today and it died several times when I stopped at stop lights. It still has the stumble. It's just not as bad as it was. I went to the wrecking yard and replaced the PFE Sensor and gave it a test drive and the check engine light came on. It didn't run any different. I ran the code and there was only one.
337 (O,R,M)EGR feedback signal is/was was high - EVR

Is the EGR valve bad? If so can it be cleaned.
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