94 PCM wiring question

Reply Subscribe

Thread Tools

Search this Thread

Aug 29, 2009 | 04:00 PM

jeff gammon

Thread Starter

Junior User

Joined: Mar 2009

Posts: 79

Likes: 0

94 PCM wiring question

1994 f150, 4.9, automatic tranny E4OD. Will the engine perform normally without terminals 55, 52, 42, 19, 38, 53, 41, 32 hooked up which go to the automatic tranny control. Also without terminals 3 & 6 hooked up that go to the vehicle speed sensor. Terminals 10 & 43 go to the A/C system, is this just to shut down the A/C compressor at WOT.

Thanks,
Jeff

Aug 29, 2009 | 06:20 PM

danr1

Lead Driver

Joined: Aug 2006

Posts: 5,670

Likes: 13

From: Sand Lake, MI

Will the engine perform normally without terminals 55, 52, 42, 19, 38, 53, 41, 32 hooked up which go to the automatic tranny control.

Depends on what you mean by perform normally it will run fine yea but I wouldn't drive it.
Without those, the VSS and PSOM the transmission will not shift right at all if at all. While it may go into limp mode and shift the shifts would likely be very harsh and late if at all.

Why is it you want to run it like that? could you elaborate please.....

Aug 29, 2009 | 08:32 PM

jeff gammon

Thread Starter

Junior User

Joined: Mar 2009

Posts: 79

Likes: 0

I am wanting to put the EFI engine and all related parts into a 78 f100 which currently has a 4.9 in it. The 79 has a 3 speed manual tranny, which I will leave for now. Because I don't know of a way to make the E4OD work with the speedo in my old truck. May eventually put an AOD in place of the 3 speed manual.

Thanks,
Jeff

Aug 29, 2009 | 08:54 PM

baldboyford

Tuned

Joined: Jan 2006

Posts: 263

Likes: 6

From: Blue Ball, PA

I'm not positive, but I believe that Ford made a speed sensor that also allows the use of a cable driven speedo. Probably in the early years of EFI. If you could find one of these sensors you could swap in the E4OD and not worry about proper operation of the powertrain or ECM. If I were a bettin' man, I'd bet there is a way to have the E4OD in your '78 with the '78 speedo.

Aug 29, 2009 | 09:06 PM

jeff gammon

Thread Starter

Junior User

Joined: Mar 2009

Posts: 79

Likes: 0

I know they made them for the AOD, but never have heard of one for the E4OD. I'm not saying they don't make one I just don't know of one. I would love to have the E4OD in the old truck, because I already have it and this is a low budget project. I only gave 100 dollars for the 94 model and drove it 65 miles home. The drivetrain is in good shape, but it doesn't have a straight body panel on it anywhere. It is beat to peices.

Aug 29, 2009 | 09:22 PM

danr1

Lead Driver

Joined: Aug 2006

Posts: 5,670

Likes: 13

From: Sand Lake, MI

Quote:

Originally Posted by jeff gammon

Oh well then no you don't need any of those, it will however throw error codes because its all missing.

You could pick up a used computer for a manual trans truck with the same motor to avoid all that though.

Surly a way to use the E4OD if you want to.

http://www.becontrols.com/products/products.htm

Aug 30, 2009 | 09:20 AM

Conanski

FTE Legend

Joined: Jun 2006

Posts: 31,930

Likes: 1,499

From: Ottawa, Ontario

Yes there are combination electrical/mechanical speed sensors for these tranmissions, if there isn't a VSS port on your particular version of the E4OD it may be possible to retrofit an earlier tailstock with a sensor output, if there is a port then you simply plug in a module like the one below, connect the drive cable to the dash and the electrical to the computer..