Leslie 928 S2

Hi All:

Doing a little research just for my own personal curiosity. Would you all please post here, or PM me, either way, the year and make of your car(s), plus your ignition and injection brains' Bosch and Porsche part numbers? I'm most interested in the numbers that came stock with your cars, but if you also have other number brains that you got later to replace your stock numbers (due to rebuild or otherwise), I'd like to know that information too.

I'm going to make a spreadsheet tracking the information, and anyone who wants the spreadsheet when I'm done will be welcome to have it for the cost of a PM or a post here.

Thanks all for your help!!
Leslie
1984 Euro 5 speed

Steve J.

Here is some data, schematics and other info.

danglerb

Very nice info at that site.

Garth S

Johns website, JDSPorsche also contains a wealth of information.

SharkSkin

What brain?

danglerb

I use the AB Normal.

Rich9928p

Some of the info that I have collected over the years.

928 L-Jetronic controller part numbers
Label
Year Porsche P/N Bosch P/N Color
1980 928.618.106.01 0 280 002 101

1981 928.618.106.04 0 280 002 104 blue
- 1984

928 LH-Jetronic controller part numbers

25-Pin Modules Label
Year Porsche P/N Bosch P/N Color
1984 928.618.123.00 0 280 002 501 black

1984 928.618.123.00(02) 0 280 002 501 black
to 1986: Euro M28.21/22

1985 928.618.123.03 0 280 002 502 blue
- 1986: US-Spec M28.43/44

1985 928.618.123.04 0 280 002 503
- 1986: US-Spec M28.43/44/45/46

35-Pin Modules

Label
Year Porsche P/N Bosch P/N Color
1987: 928.618.123.10 0 280 002 504 blue

1988: 928.618.123.11 0 280 002 504 orange

1988: 928.618.123.12 model M 637 (GT model, manual transmission)

1989 928.618.123.13 0 280 002 507 lilac
- 1990

1989 928.618.123.14 0 280 002 506 green
- 1990: model (M637 = GT model, M639 = manual transmission)

1991: 928.618.123.25 0 280 002 508 brown
model (M 249 = Automatic transmission)

1991: 928.618.123.26 0 280 002 509 da.blue
model (M 481 = Manual transmission)

1993 - 1995: 928.618.123.30

EZF Module

Year Porsche P/N Bosch P/N Color
1984 – 1986: 928.618.124.03 0 227 400 012 Black
Euro M28.21/22

1985 - 1986: 928.618.124.05 US-Spec M28.43/44

EZK Module
1987: Early 928.618.124.10 (small “hook” clip), Later: 928.618.124.11 (LH type clip)
1988: 928.618.124.12, 14, 15
1988 - 1989: 928.618.124.13 (M637 = Club Sport)
1990: 928.618.124.16 (M637 = Club Sport)
1989 - 1990: 928.618.124.22 M 639 (GT model and manual transmission)
1989 - 1991: 928.618.124.15 model M 249 (Automatic transmission)
1991: 928.618.124.26 model M 481 (Manual transmission)
1993 - 1995: 928.618.124.30

EZK Specifics
Label
Year Porsche P/N Bosch P/N Color
1987 928.618.124.10 0 227 400 035 orange
1987 928.618.124.12 0 227 400 035 orange
1991 928.618.124.15 0 227 400 154

Bosch ECU part number Scheme
0 227 = Ignition only for ignition)
0 261 = Motronic/DME/Ladedruckregelung fuel + ignition
0 263 = " " newer generation
0 265 = ABS
0 280 = Jetronic (Monojet/L-Jet/LH-Jet/LE-Jet.. fuel + Lambda regulated
0 281 = Diesel

Leslie 928 S2

Wow!! Nice offerings, guys. More than I thought I would get...

Steve J. and Garth S. Thanks! Both sites had very good info for the later models. For some reason, I'd had trouble finding the info the first time I checked John's website, but I was able to find it this time.

SharkSkin...you funny!!

Rich9928p, you, sir, are apparently much like me. You want to know everything about everything. Too bad I'll never really get anywhere, but I'm interested and I'm trying to learn. Eventually, something soaks in when you live with a dyed in the wool wrencher...but it just never seems to be enough to be useful! LOL....anyway, awesome list! Thanks!

Catch you later!
Leslie

Rich9928p

I happen to be quite intimate with these modules .... and fix them.

the flyin' scotsman

In the hardcopy of PET page 125 list all the 'controllers' including he FI and Ign. brains. For corresponding Bosch numbers they're scattered throughout the WSMs with the Porsche part numbers.

Also, 928 Specialists, do a good job of listing which brains are associated with which MY of car.

For specific differences between different years of the same model you'll probably find that the 'eproms' were mapped a little differently but the major components of the PCB were all common.

Now that being said JDS have developed a new version of the 'tile' which is the part of the LH brain that's weak. Given that the LH brain can and does fail with no previous symptoms it's a good preventative maintenance point.

Leslie 928 S2

No gots...

Yeah, and what a pain it is to find them all...part of why I'm making this spreadsheet...

Shoot, how did I miss that? I'll check that out too.

As I said earlier, I'm really just doing this for my own personal curiosity. In looking for brains for Kevin, I've noticed that there seems to be some discrepancies out there as to which units will fit what cars. It got me wondering.

Thanks all!! What a great group of people this is...

the flyin' scotsman

If you like it could be scanned and emailed?


Come on now; the WSM a pain to find info



Gotta hate it when that happens although in my case its part of the Scottish heritage that causes grey matter failure

Lorenfb

"Now that being said JDS have developed a new version of the 'tile' which is the part of the LH brain that's weak."

An updated LH control unit with a more reliable hybrid circuit is available from a few
Rennlist sponsors, e.g. 928 International.

SharkSkin

I was being half-serious -- 78/79 had no Ignition/Fuel brain. Doesn't matter, the car still has a mind of it's own.

Leslie 928 S2

Yes...we got one of those too. An 85 brain...which was promptly fried by the same offending fuel injectors that fried our stock brain. This was in Kevin's 84 Euro Automatic. Story Here

Then we got the 84 Euro with a stick shift (now my baby), and I discovered, quite interestingly, that the stock LH unit for that car was the same number as the stock one for the automatic...the very number brain we had been looking for without success. Kevin and I had thought, based on info we must have misinterpreted out of the WSM, that the brains would have different numbers for the auto and stick cars, especially since they don't have the same motor M28 numbers.

In the stick car, the stock brain had been rebuilt by the PO through some outfit in Florida, and it came back still not working quite right. There's a definite miss in the low end, and loss of power in the high end. The PO delivered the car to us with an 85 brain in it, which is working, but as we all know it probably doesn't work as well as the original. Yikes, these cars with their electrical and brain issues. What a PITA! But man, the car has so much power, and is such an animal, that we're really dying to know whether the correct brain would add even more to it... Heck, at this point, Kevin's wondering if the car might be not 100% stock, because he feels, after working on it for two weeks now, cleaning up loose, disconnected or broken vacuum lines, corroded wires, and fixing poor mechanical work (stuff is loose that shouldn't be, it had the wrong spark plugs AND the wrong timing belt tooth type, that sort of thing) that the power is really impressive and very close in feel to the supercharged automatic. It gets better and better every day...

Yeah, what a surprise, huh? LOL...god I hate those books!!

Me likee!! Yes please???
EDIT: If you could, please send it to Purple6666"at"aol.com. Thanks!