90's Ford F150 F250 F350 Ranger Truck OBD1 ECM PCM Engine Computer Testing Common Symptoms & Failure

Eric here with Pro-Rebuild back with another video. This time, we showcase our custom Ford EEC-IV ECM/PCM Engine computer tester! This testing rig allows us to test several key circuits inside these failure prone PCMs to both verify condition and prove our repair! This applies to
1991-1995 Ford F-150
1991-1997 Ford F250 and F350 Gasoline only
1992-1996 Ford E150, E250 and E350
1993-1994 Ford Ranger
Many common symptoms of a bad PCM in your vehicle would be:
-Cranks no start
-one dead injector bank
-Fuel pump stuck on
-Won't idle
-Check engine light on but no codes stored.
-Improper reference voltage
There are some other less common failures but we cover as much as possible when testing these.
So you think yours is bad, and you want a new one, what do you need to know before you buy?
As mentioned in the video, the part number is paramount! This part number identifies both the year and model, along with the engine, transmission and calibration. The part number is found on the white tag on the connector and will look something like "F4TF-12A650-PB".
If your vehicle has an aftermarket remanufactured pcm, theres a good chance the part number will be missing from the pcm. Sometimes, you will find the 4-digit strategy code on a sticker on the door jamb, or on the cowl depending on your vehicle. If none of this information is present, please contact us and we'll try to narrow down your search.
Many of these are VERY hard to find, and we are often out. In some cases, it is possible to repair yours.
A multimeter or a volt meter will get you very far in diagnosing a bad pcm. Hope this video helps and if you're looking to purchase, we can be reached at:
Pro-Rebuild [phone], during normal business hours CST.

Thanks for watching!

[prestonharris]

This is cool that y'all's doing this love it.. I've got a few of these trucks and I put a computer from a automatic in a manual and has worked for over 15 years. The check engine light is on but no issues running or driving. They were the same motors at least lol. I wouldn't have even tried to do a manual to auto but other way around ship it lol.

[SarahnTuned]

Thought this was a solid company after watching the video, you seemed to really know these ECU's in & out, however, after calling/emailing I can't say I'd recommend your services to anyone.

[Skitter]

'91 Bronco, 2 of my Caps leaked and cooked my transmission over 1 year of driving it. Early Torque converter lock up was the only major clue that something was wrong.

[aberakadabra]

We got these EEC IV in our
E series falcons in AU

[lcj]

Great info for a 7 min video, especially the info on just buying one online, that says its fits your vehicle.

[kennethcallahan]

I'm working on a 94F150 been throwingO2 sensor codes, out new sensor in an still throwing a 173 code. Gonna do some more checking and if can't get it will look at ECM an give y'all a call, been a subscriber for a while now and love the teardowns!!

[extracrazyguy]

Erick kicks ass!! (Idocars) you are the man!

[malcolmgeorge]

We have a 95 Power Stroke that is having throttle issues. First time it revved up all by itself with no one in the truck. Now about every half hour it starts rattling smoking, and looses all power. We were scanning it thru one of these episodes and the injector pulse width goes from 1.2 to 5.5! We tried a rebuild IDM and it won't even start. :D

[mykchchas]

Hey tool you use to test ecu its aweson, vendes de ese tipo de herramientas

[Mike-ryti]

I would love to be able to tune one of these and modify the firmware to reuse inputs and outputs like they do with hondas

[brucebrown]

Where is your store front on the internet. How much is a rebuilt?
B K Brown in Knoxville TN

[Maples]

I have an 89 E150 with 70, 000 original miles, when starting warm it has a pulse idle for a few minutes then smooths out, but cold start it operates like new. I wish there was reprogramming for extra power like there used to be, I've been wanting a replacement ECU for when mine shorts out in the future. I have a 600 I/6 with the C6 transmission

[timothytarr]

I have one that needs repaired how do i go about sending it to you

[rohbjennings]

@Pro Rebuild - did you guys ever do a video on the diesel test kit I didn't see it on your channel? Do you know where I can find a PCM harness wiring diagram for a 1993 F-350 7.3 IDI Naturally Aspirated 2WD?

[rjverackajr]

How do I contact you? I need (at minimum) technical advice

[sohcammer]

95 F250 7.5 Automatic. Starts fine idles with a slight miss, runs fine as long as I don't stomp on it. As soon as I stomp on it, severe misfire, rpm drop, harsh jerking and rich exhaust. Timing light on coil wire confirmed coil is not firing when misfire occurs. New distributor, plugs, wires, coil, ICM, MAP, fuel pressure regulator. Previous owner was chasing this problem. Drive it 8 hours home as long as I babied it no misfires. I'm down to ECM or timing chain. No check engine light. Have you seen this specific symptom?

[xzqzq]

Great video. ! I have a 1993 F-150 which cranks, but doesn't start. Replaced distributor, coil, and the computer twice. Truck will start & run for @ 30 minutes, then die. I bought a tester from Amazon, but for OBD 2. I assume Amazon has testers for OBD 1. Suggestions ?

[MCI]

Eric, I need a PCM for my truck and I had tried calling the number you have listed in the description to find out if you had one available and see if I can purchase via phone but I get a recording that this number is not available. Did you change numbers or what’s up brother? I checked a couple times and what I dialed is exactly what’s in the description. Can ya please help Eric, I need to get my truck running, my feet are tired of walking! Lol

It’s a 1994 F-250, automatic transmission. I’m gonna pull it in a few hours and hopefully it will still have the part # decal on it, but we’ll see.

Thanks Eric!! I appreciate the help !!

[colstonmulligan]

Ok little study here 1990 f250 7.5L gas battery was installed backwards by customer now we’re getting irrational fuel pump relay activation and constant coil firing without the engine spinning could an internally shorted ecu cause that ?

[ericknoll]

how do i get in touch with you? i went to your web site but couldn't figure out how to contact you from it