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Replacement PCM needs matching numbers?

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Old 10-19-2017, 12:19 PM
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Default Replacement PCM needs matching numbers?

My truck has started stalling/ not starting when warm recently. No spark or fuel. I already changed the crankshaft position sensor and checked the power splices by the fuse box and they're fine. So, i've been looking for a used PCM, but everyone is saying the numbers have to match. Does anyone know why or what they're talking about? Do i have to find a PCM marked 8276?

Also, the pin 4 (sensor ground) doesn't seem to be connected to ground. Going to see if i can trace that wire first. Hope i don't need a PCM, because it's being a pain to find one
 
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Old 10-19-2017, 02:02 PM
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What are you working on?
 
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Old 10-19-2017, 04:03 PM
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Originally Posted by HeyYou View Post
What are you working on?
My bad. Motor is a 5.9L out of a 94 Ram 2500. It's in a 95 Dakota. Has been running fine for years,
 
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Old 10-20-2017, 12:21 PM
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The connector for the PCM and the PCM itself seem to have different numbers. Wondering if it's worth it to grab one for $30 and see if it'll work before spending $100 on eBay for on with matching numbers
 
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Old 10-20-2017, 12:32 PM
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I suspect that if you grab the PCM out of a 94 or 95 full sized truck with the 5.9, and same trans, it will plug right in, and work......
 
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Old 10-20-2017, 02:40 PM
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Originally Posted by HeyYou View Post
I suspect that if you grab the PCM out of a 94 or 95 full sized truck with the 5.9, and same trans, it will plug right in, and work......
That's what i figured too! But all the people on facebook groups are saying numbers have to match and silly things. I've never heard of anything like it. Except my Firebird where the chipped key has to match the PCM, but that's different. I'll give it a shot i guess.
 
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Old 10-20-2017, 02:42 PM
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Originally Posted by OMGnanerpus View Post
That's what i figured too! But all the people on facebook groups are saying numbers have to match and silly things. I've never heard of anything like it. Except my Firebird where the chipped key has to match the PCM, but that's different. I'll give it a shot i guess.
They are probably thinking about the newer trucks. On the 98 and up trucks, the PCM has to be flashed to the correct VIN, or things like ABS, and SRS won't work. Your truck is old enough, that the PCM simply doesn't care about matching numbers.
 
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