4EOD Solenoid diagnostics?
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Junior User
Joined: Nov 2011
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From: Sierra Foothills
4EOD Solenoid diagnostics?
I just had a torque converter, solenoid and pump changed in my '94 4EOD (no OBD). It now doesn't seem to know when to shift or the TC is locking and unlocking at arbitary times. At light throttle it will 'bump', sometimes quite hard. I took a 200 mile trip last week and one time I was at a light and it felty like someone bumped me from behind. Another time I was climbing a grade, OD off and it slammed in and out of gear(?) violently. Most of the time it just bumps in city traffic or going down a slight grade.
I've also replaced the neutral safety switch. I paln to replace the TCS when it comes in the mail. I've read about PCU 'retraining procedure'. Is this a critical step? Any way to confirm the TC or solenoid are functioning correctly?
thanks-
I've also replaced the neutral safety switch. I paln to replace the TCS when it comes in the mail. I've read about PCU 'retraining procedure'. Is this a critical step? Any way to confirm the TC or solenoid are functioning correctly?
thanks-
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,643
From: SE Florida
All E4OD trucks have OBD. They are all OBDI, but there are diagnostics there.
First you need to read the codes to see if any are stored.
Which solenoid did you replace? You say the solenoid, there are four solenoids.
What is a TCS that you plan to replace?
There is no retraining procedure for any 1994 computer.
You can confirm that everything is working correctly with the proper scan tool connected to the data stream. There isn't a lot of information available, but there is enough to tell what's going on inside.
First you need to read the codes to see if any are stored.
Which solenoid did you replace? You say the solenoid, there are four solenoids.
What is a TCS that you plan to replace?
There is no retraining procedure for any 1994 computer.
You can confirm that everything is working correctly with the proper scan tool connected to the data stream. There isn't a lot of information available, but there is enough to tell what's going on inside.
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Junior User
Joined: Nov 2011
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From: Sierra Foothills
Thanks Mark,
I was told it was the 'solenoid pack'. Are they all together?
I meant TPS- throttle position sensor.
Sounds like I need to find a well equipt shop or dealer. I had it set to tow to a dealer 2 weeks ago but at the last minute they said they don't take RV's.
I was told it was the 'solenoid pack'. Are they all together?
I meant TPS- throttle position sensor.
Sounds like I need to find a well equipt shop or dealer. I had it set to tow to a dealer 2 weeks ago but at the last minute they said they don't take RV's.
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Junior User
Joined: Nov 2011
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From: Sierra Foothills
Its a 460. Thanks for the heads up on the Equus. A quick search says no local auto parts have one. For $25 I should have one in my tool box.
Even tho the solenoid body has been replaced can't thay have gotten a faulty one? What else could be causing this? The biggest problem is it doesn't happen all the time. It's so violent at times I'm sure damage is being done.
Even tho the solenoid body has been replaced can't thay have gotten a faulty one? What else could be causing this? The biggest problem is it doesn't happen all the time. It's so violent at times I'm sure damage is being done.
Post Fiend
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Amazon.com: Equus 3145 Ford Digital Code Reader: Automotive Click on this link for a good deal on one. Would be handy to have for any engine problems as well.
Hold on and I will find you a link to getting codes without a code reader.
Hold on and I will find you a link to getting codes without a code reader.
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Post Fiend
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Fuel Injection Technical Library » How To Run a Self-Test Here you go. Yours will probably be 3 digit codes. You can get what the codes mean (when you have them) by clicking on the codes in the list on the right side of that page.
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Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
A solenoid code doesn't necessarily mean the solenoid is bad. It's very likely that there is a damaged/corroded wire or connection between the PCM and the transmission. That will cause your problem, too.
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Junior User
Joined: Nov 2011
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From: Sierra Foothills
Great links Lazy K. Thanks for posting.
Mark, my original thought on this was a wire or connector was damaged during the transmission removal. RV is headed to the shop this morning. I'll request they focus there.
regards-
C-dad
Mark, my original thought on this was a wire or connector was damaged during the transmission removal. RV is headed to the shop this morning. I'll request they focus there.
regards-
C-dad
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