Re: Can an ECU be repaired?
[Re: 6PAX]
#3163352
07/26/23 12:09 PM
07/26/23 12:09 PM
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Joined: Jan 2003
Posts: 21,507 N.E. OHIO, USA
A12
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 21,507
N.E. OHIO, USA
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Yes, there are several companies that offer repair services for ECU, ECM, PCM or whatever name the use. Most of the major auto parts stores have someone they use or you can contact Cardone, Car Computer Exchange, in NC, SIA Electronics in Illinois, https://siaelec.com/ and probably a dozen others. Call your local auto parts store and ask who they might use? I know Cardone requires you to take it to an auto parts store as they have no way to do payments with a consumer. Mike
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Re: Can an ECU be repaired?
[Re: A12]
#3163361
07/26/23 12:39 PM
07/26/23 12:39 PM
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Joined: Dec 2014
Posts: 5,816 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,816
ohio
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Ecu isn't ecm isn't pcm. Nobody rebuilds ECU because they're so cheap to make new.
Ecm or pcm there us a market for repaired units.
Angry white pureblood male
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Re: Can an ECU be repaired?
[Re: A12]
#3163363
07/26/23 12:42 PM
07/26/23 12:42 PM
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Joined: Sep 2003
Posts: 19,402 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,402
north of coder
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i think the OP is referring to a "chrome box", not a late model computer control unit. [if i'm wrong, please correct me !] if so, other than swapping out the round gizmo on the face, [i forget what it's called] they are not generally worth messing with. by the time you remove the potting material on the back side, and screw around checking all the diodes, resistors, and solder joints, then fixing what you can, you might just as well buy a new unit if you can find one. basically just not worth the time and effort to repair, just to try to get a few bucks out one. just an old man's opinion. your mileage will vary.
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Re: Can an ECU be repaired?
[Re: moparx]
#3163373
07/26/23 01:09 PM
07/26/23 01:09 PM
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Joined: Jan 2003
Posts: 12,043 State of Confusion
hp383
Just a normal tag again
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Just a normal tag again
Joined: Jan 2003
Posts: 12,043
State of Confusion
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They cant be repaired, but since it is a fancy MP part, rather than toss it away, maybe it could be used to convert into a stealth GM HEI module.
Join the Penguin Liberation Front!! Stop the Hippo Occupation!
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Re: Can an ECU be repaired?
[Re: moparx]
#3163409
07/26/23 03:12 PM
07/26/23 03:12 PM
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Joined: Jan 2003
Posts: 5,621 Detroit area
6PAX
OP
master
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OP
master
Joined: Jan 2003
Posts: 5,621
Detroit area
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i think the OP is referring to a "chrome box", not a late model computer control unit. [if i'm wrong, please correct me !] You are correct.
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Re: Can an ECU be repaired?
[Re: hp383]
#3163410
07/26/23 03:25 PM
07/26/23 03:25 PM
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Joined: Jan 2003
Posts: 75,007 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,007
U.S.S.A.
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They cant be repaired, but since it is a fancy MP part, rather than toss it away, maybe it could be used to convert into a stealth GM HEI module. I did that with an old orange box I have , put an Accel HEI inside it . I don't see anything special about a CHROME box since it wasn't a production line part used on a Hemi car .
running up my post count some more .
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Re: Can an ECU be repaired?
[Re: JohnRR]
#3163417
07/26/23 03:34 PM
07/26/23 03:34 PM
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Joined: Jan 2005
Posts: 4,406 Michigan
MarkZ
Worthy
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Worthy
Joined: Jan 2005
Posts: 4,406
Michigan
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There was somebody here doing it themselves. If I remember correctly what fails on these things is the transistor. If you have the number I'd be willing to bet you could find it on Digikey. Would never bother with any of the newer boxes - they're all crap.
1987 Fifth Avenue - 512/518/D60
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Re: Can an ECU be repaired?
[Re: MarkZ]
#3163447
07/26/23 05:05 PM
07/26/23 05:05 PM
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Joined: Aug 2007
Posts: 6,095 Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,095
Valencia, España
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I fixed mine replacing the transistor. Also a Mopar Chromed box. The harder part is get a GOOD quality transistor. Fortunatelly found couple of NOS Motorola pieces.
Last edited by NachoRT74; 07/26/23 05:05 PM.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: Can an ECU be repaired?
[Re: MarkZ]
#3163450
07/26/23 05:07 PM
07/26/23 05:07 PM
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Joined: May 2019
Posts: 6,246 nowhere
Sniper
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master
Joined: May 2019
Posts: 6,246
nowhere
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There was somebody here doing it themselves. If I remember correctly what fails on these things is the transistor. If you have the number I'd be willing to bet you could find it on Digikey. Would never bother with any of the newer boxes - they're all crap. They don't really make the proper transistor anymore. If you can find on, it's usually made is some sub-third world sweat shop with all the QA that implies. A few years ago I found a suitable replacement transistor for this ECU's, but the Mouser cost was more than a new ECU, lol. Yes, an Orange or Chrome box can be repaired, but it is not really cost effective if you don't DIY. I can do it, but I don't because that is real old tech stuff and I prefer to run a Microsquirt setup.
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Re: Can an ECU be repaired?
[Re: 76Beeper]
#3163626
07/27/23 12:41 PM
07/27/23 12:41 PM
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Joined: Aug 2003
Posts: 43,173 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,173
Bend,OR USA
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I bought two of the Standard brand replacement ECU, a 4 wire and a 5 wire, from my local NAPA store. I wasn't sure which one was better so I will try both and see which one I like the best
Last edited by Cab_Burge; 07/27/23 12:41 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Can an ECU be repaired?
[Re: Cab_Burge]
#3163645
07/27/23 01:42 PM
07/27/23 01:42 PM
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Joined: May 2019
Posts: 6,246 nowhere
Sniper
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master
Joined: May 2019
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nowhere
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I bought two of the Standard brand replacement ECU, a 4 wire and a 5 wire, from my local NAPA store. I wasn't sure which one was better so I will try both and see which one I like the best The only difference is that the 5 pin is exactly the same as the 4 pin but with a dummy 5th pin so people wouldn't complain that it didn't have 5 pins like the original did. Improved design did away with the basing resistor (the extra two prongs on a 4 prong ballast) that the 5th pin was used for.
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Re: Can an ECU be repaired?
[Re: NachoRT74]
#3163664
07/27/23 02:37 PM
07/27/23 02:37 PM
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Joined: Sep 2003
Posts: 19,402 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,402
north of coder
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I fixed mine replacing the transistor. Also a Mopar Chromed box. The harder part is get a GOOD quality transistor. Fortunatelly found couple of NOS Motorola pieces. transistor...........that is what i couldn't remember the name of. CRS disease ya know ! thank you and MarkZ for clearing my cobwebs a little bit. gutting the chrome/orange box and using a gm HEI module is really pretty simple after you get the potting material out of the bad box. diagrams and how to's are readily available, and would be the way to go instead of trying to find a quality TRANSISTOR [i remembered the name ] to repair the original box.
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Re: Can an ECU be repaired?
[Re: 76Beeper]
#3164458
07/31/23 09:50 AM
07/31/23 09:50 AM
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Joined: Jan 2003
Posts: 75,007 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
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U.S.S.A.
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I did that with an old orange box I have , put an Accel HEI inside it . John - how does one go about putting an Accel HEI in an old orange box? I'd be willing to do that. Any chance to get a better ignition & get rid of the ballast resistor is a good thing. I melted out the goo they use to encase the electronics, hold it upside down and wave a torch under it, stay far enough away to not burn the paint. Once you get enough of it out the board is easy enough to remove. I made an alum plate to mount the HEI to, attached it with the screws that hold the the transistor on the outside , used longer screws that looked the same, heat sink compound between the HEI and the alum and wired the HEI to the orange box plug for power and the connections to the Dist. pickup.
running up my post count some more .
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Re: Can an ECU be repaired?
[Re: John Brown]
#3165075
08/02/23 12:44 PM
08/02/23 12:44 PM
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Joined: Aug 2007
Posts: 6,095 Valencia, España
NachoRT74
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Valencia, España
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The chrome box uses the MJ10012 transistor
Last edited by NachoRT74; 08/02/23 12:46 PM.
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: Can an ECU be repaired?
[Re: NachoRT74]
#3165199
08/02/23 09:32 PM
08/02/23 09:32 PM
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Joined: Jan 2003
Posts: 5,439 So Cal
Sinitro
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So Cal
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The chrome box uses the MJ10012 transistor Be very, very careful when shopping for a replacement transistor... The MJ10012 transistor is a generic NPN darlington available from multiple sources, since we deal directly with procurement from China sources we have found these costing from $1.25 up to $9.... Best to buy from an established USA source such as Mouser or DigiKey. Just my $0.02...
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