Need help with getting correct eec
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2nd Gear
Joined: Jul 2024
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Need help with getting correct eec
I have a 92 f350 4.9L manual transmission. EEC was bad so I got a new one. It ran fine for a few months but now I think it’s bad and I don’t know the original part number for the right eec. Can someone help?
calibration number is 1-71J-R10 and the number on the other side is M1X2
calibration number is 1-71J-R10 and the number on the other side is M1X2
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 219
From: W (BY GOD) V
I have a 92 f350 4.9L manual transmission. EEC was bad so I got a new one. It ran fine for a few months but now I think it’s bad and I don’t know the original part number for the right eec. Can someone help?
calibration number is 1-71J-R10 and the number on the other side is M1X2
The first thing you need to do is fully diagnose what is happening and then go from there.
Is the ECM/PCM a reman? Did you give them the original ECM as a core? You might want to consider a take-out at a salvage yard to save some $$$.
And always write down and keep the ID off the old ECM. If reman, it is hard to say what they sold you.
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2nd Gear
Joined: Jul 2024
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You need someone here that has the correct year MASTER PARTS CATALOG and can go into the CALIBRATION CODE PARTS LIST to find the correct PN. Then you need to find out if the PN was ever superseded or if there is a TSB concerning the ECM.
The first thing you need to do is fully diagnose what is happening and then go from there.
Is the ECM/PCM a reman? Did you give them the original ECM as a core? You might want to consider a take-out at a salvage yard to save some $$$.
And always write down and keep the ID off the old ECM. If reman, it is hard to say what they sold you.
The first thing you need to do is fully diagnose what is happening and then go from there.
Is the ECM/PCM a reman? Did you give them the original ECM as a core? You might want to consider a take-out at a salvage yard to save some $$$.
And always write down and keep the ID off the old ECM. If reman, it is hard to say what they sold you.
As far as the truck, it started with a no start problem. Would only start with a squirt of starting fluid. Now after maybe 15 starts with ether it won’t start and has no spark. I recently replaced plugs, wires, cap, rotor, coil so all that should be fine. When the ecm went out before it had a similar issue so I came to the conclusion that’s it. Also it’s under warranty still. I just don’t want to stick another ecm in there if it’s not the right one.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
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From: Kentucky
Unplug the EEC/PCM connector, then check for spark again. If it returns, you have confirmed the computer is bad again.
I do not have a decoder to figure out what PCM related to your calibration code. Even if the catch code is not 100% correct it would not prevent getting spark. This listing from FS1 shows Catch Code M1X2 is Ford# F1TF-12A650-AHC and is used on 1993 trucks with a 4.9L engine and manual transmission.
It's close and should work. Other options are F2TF-ABA, F2TF-APB, F2TF-ATA, F2TF-ASB
I do not have a decoder to figure out what PCM related to your calibration code. Even if the catch code is not 100% correct it would not prevent getting spark. This listing from FS1 shows Catch Code M1X2 is Ford# F1TF-12A650-AHC and is used on 1993 trucks with a 4.9L engine and manual transmission.
It's close and should work. Other options are F2TF-ABA, F2TF-APB, F2TF-ATA, F2TF-ASB
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 219
From: W (BY GOD) V
The trouble with outside reman vendors is that they go their PN SYSTEM and may modify several applications to fit one or the other way around.
Does it have spark at the plug?
This truck has TFI (THICK FILM IGNITION) with the ICM on the DIST BOWL?
Does it have spark at the plug?
This truck has TFI (THICK FILM IGNITION) with the ICM on the DIST BOWL?
Tuned
Joined: Jan 2015
Posts: 476
Likes: 93
There's a good chance your PCM/EEC has leaking capacitors. Open the case and you can see this visibly. Look for the vertical cans. Could be two or three of them. Cheaper to fix these than to replace the unit, if you know someone that can solder decently.
Cargo Master
Joined: Mar 2002
Posts: 3,132
Likes: 219
From: W (BY GOD) V
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Hotshot
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How would that be cheaper than a free replacement under warranty?
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Tuned
Joined: Jan 2015
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He said "...should still be under warranty." not "...IS under warranty."
If he can confirm that the replacement has had the capacitors replaced, then that's the way to go. If not, he's getting another of the same vintage as the first one and should expect similar results over time.
Just sharing useful info. He can use it or lose it as he wishes.
If he can confirm that the replacement has had the capacitors replaced, then that's the way to go. If not, he's getting another of the same vintage as the first one and should expect similar results over time.
Just sharing useful info. He can use it or lose it as he wishes.
Cargo Master
Joined: Aug 2021
Posts: 2,258
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From: Maryland
In addition to following the advice above, it's also worth cleaning your ground connections.
Check out posts 6 and 7 at this thread. https://www.ford-trucks.com/forums/1...nd-points.html
Also, the main ground cable from the negative battery terminal to the block and frame, can cause hard to resolve issues.
Check out posts 6 and 7 at this thread. https://www.ford-trucks.com/forums/1...nd-points.html
Also, the main ground cable from the negative battery terminal to the block and frame, can cause hard to resolve issues.
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