Thats very true..those wires are dried out and stiff...heres what you can do, This is my actual note from the job:

"Multi-Crimp extension of PCM wires for a GM 1998 to newer 2002 PCM swap:

Order a set of used ebay PCM connectors from ebay, around 20-25 bucks.

Take all the wires out of your ebay connectors, theyre usually around 4-6 inches long after the seller cuts them off the harness.

Lay them out and familiarize yourself with the feel, look, and colors of them.

Now, as you remove each wire during the repin and come to ones you need to lengthen, find the matching color from the ebay connectors and strip about a half inch off and twist them very tightly.

Now, take the existing harness wire youre lengthening, and slide the tightly twisted end of the wire segment from the ebay harness, down into the center of the hollow tubular pin connector.

Using a pair of wire cutters, (preferably not too sharp of a blade) carefully crimp the silver pin connector in three evenly spaced places on a 30 degree angle firmly, but not cutting the metal through.

Practice this with wires from the ebay connector that have multiples of the same color..I used the black ones.

Now, before plugging this into the new PCM connectors(ebay), slide a small heatshrink onto the joint and shrink it down.

Identify the proper placement, slide the pin into place, and then do this a bunch more times, each time getting quicker at it."

There truly is no need for soldering this way, as long as your PCM wont be getting splashed constantly or rained on through the cowl.

Before installation, make sure to carefully seal (silicone)the unused holes in both connectors, since some positions arent reused and there will be a hole where the wire was that can let humidity in.

 

Believe it or not my first tuner did brick my PCM when reflashing it on the bench. That goes way back to when the only tuning software was LSEdit. BTW - I still have it LSEdit on the shelf somewhere.

I have HPTuners and EFI live and a wideband now. We've come a long way since then those days.

As for the wiring myself. No one has explained how long some of the wires have to be extended. But if not more than 5 or six inches that helps to know.

I hadn't thought about using your method to splice the wires. Have always been under the impression that the best splice was a splice that was soldered.

I have both Delpi crimping tools. Will test with the micro tool and see if it crimps the female end on the 98 harness well enough.

What I have found when splicing wires that are shrink wrapped is that you have to stagger the splices. Else you end up with a huge bundle of splices all in one place.

Is that what happens with your method or am I not thinking it thru and seeing the final result?

Will buy some used 99-2002 harness ends. Plan to keep in touch.

Thanks

 

Oh I bricked my PCM within two days of trying to tune my new 5.3 and said f-it lol...then went with a pro thanks goodness.

As for the heat shrinks, most of the wires that need extending, about a dozen or so, go to fairly separate areas of the plug so clumping them up wasn’t a problem for me.

Getting the grey wire covers back on takes some gentle persuasion and skinny zip ties.

The original bracket fits the new 411 -sort of- you’ll need to open the rectangular opening up somewhat to slide the pcm down far enough to set back into the factory
location.

I sealed my connectors from water with marine grade silicone.

 

In4somegoodnews

 

This link might be what was referred to in an earlier post. So if I can speculate, someone has brought this back from the dead by making a board where the pin assignments on the board have been reconfigured so the male pins in the 99-2002 411 pcm line up with the 98 pin assignments on the 98 wire harness.

Buy a used 411 pcm. Replace the existing 411 board with the 411 board with reassigned pins. Bench flash the board with the correct OS and fuel segment. Install the pcm and then plug in the 98 harness.

https://motoiq.com/aems-plug-and-pla...ers-delight/4/

According to posts back in 2017 discussing this issue - this AEM product was discontinued in 2017.

 

The product LSX Power Tuning is working on is with another company and has nothing to do with AEM. Its just put on hold due to time vs return. They will start back on it next year some time. LSX Power Tuning didnt renew there sponsorship here so you will have to contact them directly for updates.

 

I do like the idea of a plug in 411, but for the average guy or even a lot of electronics friendly people, the risk and effort of disassembling a PCM and repinning internally is a daunting task..of course tuners and PCM familiar people would be first to take it on, and LSX tuning is probably seeing like minitryker said, a difficulty with ROI and several other factors...at any rate Id think the locations and layout of the inside of the PCM case would present a problem, since to move the board to plug connections from one location to another inside of the confines of a PCM case, wires would definitely need to be added and extended, if not almost all of them, and that may create a rats nest that would get out of hand quick, and...in addition to that if you choose to make a whole new board, youd have to relocate lots of components and parts of the existing circuitry, and that means it would be best to just relayout the entire board so the circuits lined up closely with their respective pin locations along the connectors.

To me it would make sense that an adaptor plug which just goes between the existing harness and the new 411 is the way to go...two products..one for the A4, and one for the t56.

Another factor LSX might be seeing is that the availability of 411s might be starting to decrease, and like the 98 PCM, perhaps they are thinking it might become cost prohibitive to build a protocol for something that may become obsolete before they get a sufficient return.

I for a short time was going to just physically remove the plugs from my 98 PCM, and make an adaptor but once I went out and just started repinning, and saw how quick and simple it was, I am glad I didnt go through all that, although I bet Id have sold a couple dozen of them by now just on this thread alone lol.
I definitely hope all you guys who need to do this swap have good luck and find ways to do it safely and effectively..

Cheers
Dave

 

yea i called aem last year because i wanted to buy one. It's a shame they stopped doing the 0411 plugnplay

 

To clarify: AEM was referred to in an earlier post with the poster asking the status of AEM product in the link. I wasn't suggesting that LSX Power tuning was working with AEM and I said that the AEM product referred to in the link had been discontinued in 2017. Sorry if my post wasn't clear on that.

The intent of my post was to give readers the link so they could see what AEM had done and that it appears someone else has decided to modify a board for the 411 PCM that is compatible with a 98 engine wire harness.

But also to suggest that perhaps electronic experts who build boards could also rearrange the pins on the 99-2002 411 board to accommodate a 98 wire engine wire harness without having to repin the 98 wire harness. Modifying a board doesn't actually have to be done on a mass production basis. A source I know works out of his basement on the side.

Lorenz at LSX Power Tuning did reply promptly to my email to him telling me that the company they are working with has put the project on hold. Am waiting for their reply to provide me with a quote for a 411 pcm reflashed and tuned for my 98 ProCharge Z28. So for now looks like I will have to repin my harness as others have done.

For those of who have been waiting it doesn't appear that it will be anytime soon that the project will be started up again and finished. I completely understand. It's all about supply and demand. So I don't blame LSX Power Tuning at all.

I do have a source who builds boards. I plan to ask him how complex the modification is and if he can do one for me. If so then I won't have to repin my harness.

I agree with floriadave. IMO the easiest and cheapest solution for the buyer is an adapter intermediate wire harness that is plugged in that mates the 98 harness to the 99-2002 411 PCM. The only piece that is missing to build an adapter wire harness is a 40 pin male header with the correct size Aptiv/Dephi male pins that will plug into the 98 plug end engine side wire harness.

 

It was pricey ($900) but the board had some enhancements for tuning that isn't on a stock 411 board so perhaps worth it.

 

Yea it was flex fuel capable. Idk what other enhancements it had but likely quite a few just to make it more saleable. I'm surprised i never seen anyone on here trying one.

I mean **** guys will try all these different cams and all these different heads but anymore the pcm is the most important part.

 

Theres other PCMs that plug right in flex fuel capable so no point really

 

Sure there is. Plug and play with simplified tuning.

Especially for guys walking the line of street car vs race car.

 

lsx power tuning. I’m trying to get ahold of you regarding standing mile nitrous details. Sorry for hopping on the thread. It says you won’t receive private messages

 

Go to their website - LSX Power Tuning.

On the menu under Contact US - send them an email or give them a call.

 

I'm ready whenever he wants to sell me one.

 

hmm. Sad to say I didn’t think of this but thanks man

 

Any word on this?

 

Last contact info I received was that the project is on hold.

Cost of production vs sales revenue and profit most times is what stops advancement of a project so the "widget" can be put into production and sold. Available resources and/or a budget for new product development is another reason especially for small businesses.

I gave up waiting and instead chose to flash an HP Tuners Custom SD OS tune to my 98 PCM. I had no issues when making the upgrade with respect to "Bricking" my 1998 PCM.

Unfortunately, it's my understanding that the Custom SD OS doesn't allow you to continue to use the MAF sensor - SD only.

I have an opinion why the PCM bricks in some instances but is just speculation.

 

I'm still waiting.