AEM Update

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The AEM extension cable plug-in is no longer available. I have spoke to AEM and to vendors. They can't get the jeep side.

As a solution I bought and tore apart stock computers and built my own extension/jumper cable. Works great as an extension, haven't spliced in the AEM FIC yet. Would anyone be interested in one of these extension/jumper cables?
 
I had the same thought. I could build one, buy buying sound easier :)
I can't make up my mind about adding a piggyback computer. I don't need one.......yet.
 
The AEM extension cable plug-in is no longer available. I have spoke to AEM and to vendors. They can't get the jeep side.

As a solution I bought and tore apart stock computers and built my own extension/jumper cable. Works great as an extension, haven't spliced in the AEM FIC yet. Would anyone be interested in one of these extension/jumper cables?


The issue that AEM had was that the manufacturer of the PCM connector (the one piece monstrosity) stopped production due to low demand. There are implications here. Such as the PCM rebuilders will not be able to replace the connector if damaged and the supply of PCMs will drop.

Not a good thing this I'm thinking...
 
The way the ECU and the connector are made, I don't think that any ecu rebuilder will be able to replace that connector even if he had one. I think that the ecu's are year specific and transmission specific.
 
The PCM connector is Generation specific. As it turns out, the Dodge Viper uses the "same" PCM as the 96+ Heeps. Well... Physically, it was the same, slightly different programming. The PCM side of the connector has all of the pins in it, it is the vehicle side that is "missing" pins per the application.

So, I do believe that the PCM connector types are: 95 down (is there a difference in the Renix? Not sure about that), 96 to 04 and 05 up. Someone will correct me if this is wrong.
 
RENIX is very different. It's a 2 row connector about 4-5 inches long that is more similar to an IDC connector than the later ones. No waterproofing at all, as the RENIX ECU goes under the dash.

91-95 are another connector IIRC, it may be similar to the one on the dodge minivans from that era but I'm not sure.

96-01 are all either the same connector or very similar. It appears to be a similar connector as the one on the 98 dodge ram 1500 ECU I purchased as part of my intended 5.9/nv4500 MJ swap I'm working on right now, but I haven't checked which harness connectors plug into what yet. Pins do get reassigned and changed between models but the connector itself looks mostly the same.

ECUs are specific in strange ways. Basically every year has a new one, but some years interchange depending on what era harness it was and what things had changed electrically. For instance AFAIK all 87-90 will interchange, but the firmware and some of the hardware in the ECU was incrementally improved over the course of time so installing older ECUs will make the vehicle run more like the older model year. 91-93 or so should all interchange (IIRC, what was the last year of the fuel pump ballast resistor? It was either 93 or 94) and may or may not work in a 94. 94 and 95 may interchange, I'm not sure, the harness changed a slight bit due to the new steering column in 95. 96 is an odd duck, it's OBD II but has the old gauge cluster still. I've heard rumors that a 97 computer will work in a 96, but never tried it. I doubt a 96 computer will work in a 97 but it might, if it does, the gauge readings may be flaky or wrong. 97 through 99 may interchange, especially if the firmware is updated, but again, I'm not sure, there were TCU updates in 98 and wiring harness changes the same year. 00 and 01 should interchange.

This all assumes the same emissions package on the donor and recipient vehicles.

I am not speaking to any of the personality clashes or accusations here, and it really does not reflect well on anyone involved that this kind of crap gets thrown around so much. So I have no intention of taking part in any of it.
 
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You guys should just wheel them like the rest of us....Except Talyn....you should give me your Jeep! :D
 
I agree, the internals of the PCMs are different, I believe the connectors are Chryco Generic for the modle years involved. I put the Renix caveat in place as I can barely spell renix...

From a manufacturing view point (I used to was a Process Engineer) it makes sense to keep as many parts the same as possible across the entire vehicle range. For those that have not cracked open a 96+ PCM, the circuitry is built on a "flex" circuit rather than using hard cards. This allows internal connections between the halves to be made without any connectors involved. A more robust and expensive solution. I can not speak about the earlier PCMs as I have yet to crack one open.

Kastein, I agree. Mud slinging has no place here. I am just attempting to spread what I have learned to the members at large. I hold that we are better off together than apart which is why I renewed for two years. Would have taken a longer membership had it been available. If my threads are going to continue to be highjacked then I guess I will stop posting. Seems a waste.
 
Can you email me your maps or screen shots of your fuel maps and timing maps. PM sent. Thanks.
 
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