Question about 1999 Dodge Durango

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Can you replace your ecm with a used one as long as everything matches??

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Yes, just doble check the numbers.

Posted on Sep 15, 2010


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I have 1998 mitsubishi mirage i have just changed ecu /ignition assy with key reader and ignition module but the ecu is out of a different car to the ignition and module.will i need to code or synch ecu to...

Yes. problem is that some years won't sync with others. You should have gotten everything out of the same car. Then you wouldn't have to do anything except start and drive your car. you did get everything you needed, just got them out of two different cars. Codes won't match. 1 in 1000 chance they will match codes. I do this all the time, but you have to gt everything out of one car. ECM, BCM, Key,Ignition chip, and some times the instrument panel. And there is year specific, because of transmissions. But I can fix that problem also.

Mar 03, 2015 | Mitsubishi Cars & Trucks

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1998.5 Dodge Ram with 24valve Cummins...When swapping a bad ecm with a known working ecm, must i also swap pcm to match?

No, but the calibration numbers on the ecm must match.In 1998 dodge still used a prom, that you need to take out of old unit and put in new unit

Dec 01, 2014 | Dodge Ram Cars & Trucks

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If i swap a engine on a 2003 honda accord, would i have to reprogram the ecm

hi not on changing the mechanical part the ecm and transponders already match as long as u dont have to change ecm no program is required ex if u have a four cyl and u installed a 6 cyl u need new ecm that wont match including the wiring and ecm that would have to be programed to match bcm body computer module danny

Mar 30, 2014 | 2003 Honda Accord 2.4 LX

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Replaced ecm in my 95 f259 5.8, and now it won't shift

Did you put the ECM in from a donor vehicle? (Used). It might have to be reflashed as it sounds like compatibility issues. Make sure the ECM has the EXACT SAME NUMBERS in the ID as your previous ECM. If not, then you will need to get the exact match to get rid of the gremlins.

Nov 24, 2017 | 1995 Ford F250

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I have a 93 jeep grand cherokee. it will only start when the check engine light comes on. i have replaced the ecm. still not fixed. any suggestions?

Did you replace it with a re-manufactured or used ecm? If used, not all ecms are compatible with every vehicle. It has to be the exact same numbers on the ecm, matching the one in your jeep.

Nov 21, 2011 | 1993 Jeep Grand Cherokee

1 Answer

Steps to replace the ecm. do I need to unhook the battery, or anything. After it is replaced, is there any other steps like resetting anything?

Replacing and ECM is a farily involved job which will require reprogramming the replacement ECM to match the vehicle that it is installed in. Dealerships and a few independent service facilities are set up to do the reprogramming but the unprogrammed ECM may not even be able to start the vehicle until programmed so it's not a DIY kind of project. It's RARE that a vehicle needs the ECM replaced as there are a quite a few problems that can mimic a bad ECM and often an ECM problem can be fixed with a reflash update of the software. Hope this helps and good luck!

Oct 04, 2011 | 2005 Chevrolet Malibu

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My uncle has a 1991 S10,the fuel pump will run but truck will not start. you can pour fuel in and it runs. Also the truck was running fine untill a battery swap ,and it was hooked up wrong the ECM fuse...

you probably still blew the ECM. my uncle did the same in a full size chevy. it blew the fuse and the ECM. now here is the important part. he went to a salvage yard and they sold him what was suppose to be the right ECM. everything functioned but it would not start. he called me and i found that this was causing so much gas to be pumped that it was pouring in to the oil. he took it back and showed them the old one and then matched it up and all was well.

Feb 11, 2011 | 1991 Chevrolet S-10

1 Answer


if the prongs don't match;yes. you get the gm numbers off of the ecm, and let them interchange it. then ask to see a picture on the computer to see if it's the same. sometimes they do get boxed wrong.

Sep 01, 2009 | Cadillac Seville Cars & Trucks

1 Answer

1996 ECM

It is possible that the three slot box is compatible. Check on your ECM for a label. Use the numbers on that label to find the correct match. You can try a used parts store or wrecking yard, as well as the internet. You may have to remove the PROM from your old ECM and place it in the new ECM. Be very careful as the PROM is sensitive to static electricity. Let me know if you have any other questions.

Aug 18, 2008 | 1996 Jeep Grand Cherokee

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