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1968-2013 Full Size Vans Econolines. E150, E250, E350, E450 and E550

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  #16  
Old 11-22-2013, 03:51 PM
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The first 111 is just a electrical check, then a space and then the code that would say why the computer is doing what it is doing. This code would be in CM.

I would suggest that you get another mechanic that understands your era of Ford van.
It does not sound like he even knows how to pull the codes on your van.

There is no way you would not have a code in CM unless you unhooked the battery.
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  #17  
Old 11-23-2013, 12:19 AM
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I read somewhere back when my Speedometer went out that the PSOM could only compensate for 5 tire size changes, after that it went kaput. And I had gone thru about that many size changes when mine went south. I think if you change tire sizes, do all 4 wheels in the same size to keep from confusing the PSOM. I think this all has something to do with the 4 wheel ABS.
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  #18  
Old 11-23-2013, 06:43 AM
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Baddad...thanks, but I don't think the tires have anything to do with it. I'd be surprised if they did. I've always had the same size tires put on it.
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  #19  
Old 11-23-2013, 07:03 AM
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The PSOM only works with the tire sizes that are mounted on the rear axle. The 4 wheel ABS is unrelated to the PSOM in the 1995 E-series

The PSOM's Conversion Constant can only be reprogrammed six times. It is reprogrammed for tire size changes only and each time you reprogram the PSOM Conversion Constant the count is reduced by one.

If the PSOM is from a salvage yards cluster it may or may not have the right Conversion Constant in it.

Note that the rear anti-lock module can go bad and disrupt the signal from the VSS to the PSOM as it uses the same VSS generated information and is wired in parallel with the PSOM.
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  #20  
Old 11-23-2013, 10:21 AM
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I figured all that was interconnected with the 4 wheel ABS, it getting input from both the rear axle and the two sensors on the front wheels. And putting different size tires on the front screwing with the computer.
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  #21  
Old 11-23-2013, 10:48 AM
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His is a 1995 and the manuals do not show 4-wheel ABS for 1995.
The 1994 had it but still the PSOM was wired in parallel with the 4-wheel anti-lock brake system. The 4-wheel anti-lock brake module would have no effect on the PSOM unless it loaded down the VSS circuit.
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  #22  
Old 11-23-2013, 12:02 PM
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My 95 had 4 wheel ABS. As does my 96. You can't trust the manuals to be 100% accurate.
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  #23  
Old 11-23-2013, 04:07 PM
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Quote:
Originally Posted by baddad457 View Post
My 95 had 4 wheel ABS. As does my 96. You can't trust the manuals to be 100% accurate.
I have found 4 wheel ABS for the 1995 E-series under RABS as you go to the last diagrams.

But the all same stuff still applies.
The PSOM is wired in parallel with the 4-wheel anti-lock brake system. The 4-wheel anti-lock brake module would have no effect on the PSOM unless it is loading down the VSS circuit.
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  #24  
Old 12-05-2013, 08:28 PM
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i tried a quote but it didnt work,so i just had to do it this way .

what year ford van do the schematics on pg 1 posted by SUBFORD,( bill K) start with?
i have a 90 e250 and am having A/T speedo issues.
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  #25  
Old 12-06-2013, 12:17 AM
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Did you ever find the problem?

I have one from way back in the day.

I had quite a few vans with the E4OD (most often with the Diesels) giving us fits with various issues including erratic shifting.

What I followed the Pinpoint Test Step Procedures I came to a point where it told me the issue was in the wiring from one point to the other.

As it turns out the wiring harness under the passenger side battery seemed to collect acid vapors from the battery and did not show any signs at all on the wire clam shell cover, or even the internal plastic wire wrap, but when it is all uncovered, there were several wires swollen and bulging with that acid corrosion.

A faulty sensor code does not indicate a bad part if it is the signal that is getting interrupted ˝ way to it's destination.

My 1996 E350/460 just this afternoon started doing exactly what you described on the freeway down shifting to a lower gear sounding like it was in neural, banging into gear, shifting rough.

I no longer have those pinpoint test step books, but will be pulling the battery and having a look see.
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  #26  
Old 12-06-2013, 07:25 AM
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Quote:
Originally Posted by timbuctooCal View Post
i tried a quote but it didnt work,so i just had to do it this way .

what year ford van do the schematics on pg 1 posted by SUBFORD,( bill K) start with?
i have a 90 e250 and am having A/T speedo issues.
They were for a 1995 and they change a little from year to year but the 1990 is not close at all to them.
A 1990 does not have a PSOM.
If you have the E4OD then the speed information comes from the transmission/Xfer case to the PCM computer and then the computer controls the transmission.
If you have C6 then it is not controlled by the computer or the speed gear in the transmission/Xfer case.
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  #27  
Old 12-06-2013, 09:19 PM
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Quote:
Originally Posted by subford View Post
They were for a 1995 and they change a little from year to year but the 1990 is not close at all to them.
A 1990 does not have a PSOM.
If you have the E4OD then the speed information comes from the transmission/Xfer case to the PCM computer and then the computer controls the transmission.
If you have C6 then it is not controlled by the computer or the speed gear in the transmission/Xfer case.
A few years after the E4OD came out it no longer used the trans mounted sensor but got the speedo signal from the anti lock sensor in the rear end.

My 96 E350 has the 460 with the E4OD and no speedo sensor, just a plug in the hole.
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Had to sell the Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
It had a verified 19 mpg city taking off slow as hell then shutting it down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors still on I got 24 mpg at 50 to 55 mph on the freeway empty!
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  #28  
Old 12-07-2013, 07:32 AM
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Quote:
Originally Posted by archangel View Post
A few years after the E4OD came out it no longer used the trans mounted sensor but got the speedo signal from the anti lock sensor in the rear end.
That started in 1992, he has a 1990.

Quote:
Originally Posted by archangel View Post
My 96 E350 has the 460 with the E4OD and no speedo sensor, just a plug in the hole.
In 1996 the VSS was mounted in the brake housing on the drive shaft or in the rear end.
My 1994 F53 460 E4OD has it in the brake housing on the drive shaft.
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  #29  
Old 12-07-2013, 09:48 PM
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Quote:
Originally Posted by subford View Post
That started in 1992, he has a 1990.

In 1996 the VSS was mounted in the brake housing on the drive shaft or in the rear end.
My 1994 F53 460 E4OD has it in the brake housing on the drive shaft.
You mention the drive shaft, but do you mean the axle that goes to the wheel brakes?

I have no brakeparking brake assembly on the drive shaft like the older Superduty had (and as we called it the F450 as it had the rear disc brakes and was one step up from the F350).

If so, then my speedo bouncing issue at speeds above 45 mph might be coming from one of the rear wheels.
The parking brakes are also not working and the pedal goes way low on the first step when braking so I need to check them out anyway.
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Had to sell the Gray 1991 F250 standard cab, 7.3, E4OD, 3.55:1, stock wheels and tires.
It had a verified 19 mpg city taking off slow as hell then shutting it down at red lights, and with the radiator grill blocked flush, no bed cover, "drag shoot" mirrors still on I got 24 mpg at 50 to 55 mph on the freeway empty!
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  #30  
Old 12-08-2013, 06:30 AM
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An 1994 F53 is more like the F550 and I did mean drive shaft. Photo below.
No you do not have any sensors in the rear wheels at the brakes in your 1996 E350. Your sensor would be in the center on top of the rear end.

My 1994 F53 sensor:
Click the image to open in full size.

/
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Old 12-08-2013, 06:30 AM
 
 
 
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