Regina to LH 2.4 Swap

[boosted12a]

tru dat. especialy if you are in search of a certain color. +t/LH is way cheeper and easyer that a respray

[Stiggy Pop]

Hey Mike, have you looked into this any further? I pulled the LH harnesses out of my wreck today and after doing so I'm very interested in not swapping harnesses on my regina car!

[thelostartof]

If you have a harness you can swap just the wiring on the strut towers.

I will look into more and try the swap in a month or so when I swap trans on my Regina car.

[15A]

This would be a great sticky to have someone do....ala the 240 Chrysler to Bosch swap.

My 93 945 is Regina....part of a Bosch harness is due to arrive tomorrow - once all is collected (harnesses, flywheel, ECUs, K-1 for the bullet heater, rum for me, etc) , mine is going 2.4 (FTW)....the hard way - everything from the fuse block on is being swapped - along with a nicer dash, etc.

[boosted12a]

i just spent an hour or so looking at the wiring diagrams, my brain is scrambled and it looks like a pita. ignition dosent look to bad but the fuel side looks crazy. altho it dose look like it wouldnt be hard to convert to the powerstage and get away from that dam crazy coil

[thelostartof]

As soon as I find my book I will post up the wiring diagram as everything is wired the same, only different is Map / Amm and then coil/coil

[Mogly]

This is easy I did it for a customer, I have the wiring diagrams on alldata and the Volvo manual wiring diagrams
if anyone needs them PM you're emal.

[Stiggy Pop]

Originally Posted by thelostartof

As soon as I find my book I will post up the wiring diagram as everything is wired the same, only different is Map / Amm and then coil/coil

That seems like an over-simplification. There's quite a few things that would need to be repinned/moved, some wires repurposed to fill in blanks, and a wire needs to be added from pin 28 on the ECU to pin 4 on the EZK that's absent in Regina. I've started looking at this process with my Dad, it's doable but it's not a matter of moving a half dozen wires and being done.

I've got a matrix in excel that lays out the ECU pins Bosch>Regina and the EZK>REX, pin to pin what goes where and whether they are different or same. We are working on some step-by-step instructions as to what needs to be moved where etc. Just to give you an idea, from my first run through we found: for the ECU's there are 24 connections similar, 18 different. For EZK/REX it's much closer ~22 same, 4 different.

I would upload the matrix to google docs but I'm at work, anyone who's interested send me your email and I'll send it to you.

Mogly, sent you a pm would be interested in how you did it.

[boosted12a]

yeah, definatly not a afternoon job. i could see doing it in a weekend after getting a plan of attack on the wires but. the lh system i hav is out of my 740 turbo, will the lack of the wot wire make things run funky?

[thelostartof]

Ok so tell me what I am seeing wrong

LH
http://thelostartof.net/IMG_20131103_044558.jpg

Regina
http://thelostartof.net/IMG_20131103_044646.jpg

For LH
pin 17 from EZK goes to pin 1 of LH
pin 8 from EZK goes to pin 25 of LH
pin 4 from EZK goes to pin 28 of LH

For Regina
pin 17 from Rex goes to pin 1 of Regina
pin 8 from Rex goes to pin 25 of Regina
pin 4 from Rex goes to pin 28 of Regina

As for Map vs MAF looks like those wires are used for those things only so I just have to wire the correct pin to the correct location.

Rex vs EZK all of the pins on the left go to the same spots as EZK on the left, same on the right also.

I am seeing a lot of stuff matching. So someone show me points where it doesn't seem to match up as my brain is playing tricks on me I guess.

Besides swapping flex plates, and then rewiring the Map to a Maf and coil wiring . . . .

[BassGuy]

Originally Posted by aaron740gl

It advances on its own and retards in boost and the ecu doesnt have a clue, it thinks its running perfect.

Pretty sure LH2.4 still fires when it wants to, regardless of where the distributor rotor is.

[Stiggy Pop]

PM me your email so I can send you my file.

I saw the following as different between Regina and LH ECU's:

3
6
7
8
9
10
11
14
15
20
21
23
28
29
33

I THINK we mapped it out pretty well, may save you some time. Still looks doable, I just haven't had time to really think about it since I tried to size it up.

[98T5]

call me stupid, but what does "LH" mean?

[BassGuy]

Shorthand for Luftmasse-Hitzdraht (Seriously). It's a version of Bosch's Jetronic engine management that uses a hot wire Air Mass Meter.

[98T5]

Originally Posted by BassGuy

Shorthand for Luftmasse-Hitzdraht (Seriously). It's a version of Bosch's Jetronic engine management that uses a hot wire Air Mass Meter.

So, how do I know if I got that or not? I have a 93' 940. thanks

[linuxman51]

do you have an airflow meter on the airbox? or do you have a little two wire sensor on the airbox?

[spruill242]

Zombie thread...... How far did we get on this guys?

[Stiggy Pop]

Originally Posted by spruill242

Zombie thread...... How far did we get on this guys?

I'm just farting around in my slow car still. I've had my head too far up the 242's tailpipe to give the 940 any love but I still like to think I'm going to do something eventually.

[spruill242]

Roger that. Seems like Thelostartof was trying to get around swapping the whole wiring harness. Obviously that would be optimal. Looking at the schematics he put up there isn't "much" difference. You seem to think there's more than meets the eye...

[thelostartof]

Lacking time.

But on paper it really looks easy as just a few wires should be all that is required to make it swap.

Ezk and ecu swap and then a few wires in engine bay and then sensors. Maddest part of swap is the flywheel/flex plate

[boosted12a]

good luck! i looked at the scematics for a few days, looked like more than that. hope it works out tho.

[Stiggy Pop]

Originally Posted by boosted12a

good luck! i looked at the scematics for a few days, looked like more than that. hope it works out tho.

Yeah, I'd like to see it done. I should still have my pin-layout matrix if anyone gets motivated.

[spruill242]

To be honest I haven't really looked at my car real hard to get an idea of the Regina harness and connections. If I come across an LH2.4 set-up I'll get more serious. I've rewired a couple LS harnesses. So I'm used to the headache you get from looking at these schematics for an extended period of time. I guess if I get motivated, I'll post up what I end up doing.

[boosted12a]

hell, come pull the 2.4 harness out of the 740 im gonna scrap. ill donate it to a worth cause but i aint pullin it

[Harlard]

Better to just pull a 240 harness. Soo much easier.