164. 24v Guru?

[exige300]

One year into the build (see Happy Easter Bunny!) and a few problems that someone out there may be able to help me with.


1) The front engine mounting main tubular support fits perfectly, but the brace won`t fit with the casting that`s on the 24v engine. There is a stud in the right place. I can throw the casting (mounts the A/C pump originally), make a spacer or remake the brace. Or does the 12v casting fit?
2)Motronic wiring.
I have a grey AMP two pin plug with no home! It has a grey (live supply) and a blue/white which goes to pin 37. My pinout chart defines this as connected to a Cam Actuator Relay . My pinout has no mention of EGR valve connection (I`ve binned the EGR). I am 80% happy that it`s a misprint on the chart and pin 37 should be designated to EGR. Hoping someone might be able to confirm.
The original engine management loom interfaces with the rest of the car in two places. Close to the ECU, a connector goes up to the facia area, it has small dia yellow/red, blue/red, white/red and black. I assume the black is an earth and have a nasty suspicion an immobilser is involved with the others. However, the white/red only goes to the diagnostic socket, the yellow/red goes to pin88, blue/red to pin8.
Is there some way of `substituting the immobiliser signal` with a live or earth, OR, will the ECU function without these connected, OR. can these ECUs be `de-immobilised` by a specialist?
The second interface is a circular plug at the top of the nearside scuttle/bulkhead. Most of these are dealt with but I`m left with a small grey/black that goes to pin73 and a small pink/black that goes to pin11.. Any clues on these please?

I`ve tried looking at wiring diagrams on the 164 register site. No mention of the (suspected) EGR plug and pretty vague about immobiliser function.

Any help gratefully received!
Thanks.
Simon.

[NoCorseChris]

What data I have for the ML1.7 just says "Pin 37, Camshaft potion actuator relay - except V6"....not what it actually IS on a V6. Personally never seen EGR on an Alfa V6 but I do know some have had it. You might need to connect a suitable dummy load to stop it throwing a MIL...if you have a MIL. If not you can probably ignore it.

I've used 24V castings on 12V motors so the converse should be fine. May need to add or extend the odd block stud though.

IIRC, the 24V did indeed have a CODE immobiliser, and if you don't have the one that came with the donor ECU, you are facing a problem. They are matched key to CODE ECU, CODE ECU to engine ECU. CODE and engine ECU have a short serial 'conversation' at ignition on and there is no simlpe way to spoof that. Getting the ECU modded may be possible. Try Gus at AlfaTune. No connection and never used him myself, but he gets good reports.

HTH

[turbonutter]

What data I have for the ML1.7 just says "Pin 37, Camshaft potion actuator relay - except V6"....not what it actually IS on a V6. Personally never seen EGR on an Alfa V6 but I do know some have had it. You might need to connect a suitable dummy load to stop it throwing a MIL...if you have a MIL. If not you can probably ignore it.

I've used 24V castings on 12V motors so the converse should be fine. May need to add or extend the odd block stud though.


HTH

if we are talking about the v6 engine front lower mount, then I have used the 12v one on my tra engine, without any problems.

[strat24v]

if we are talking about the v6 engine front lower mount, then I have used the 12v one on my tra engine, without any problems.
If this is for a hawk then the casting is discarded and the tubular mount fits in its place. Kinda buggers up the stock air-con mount a bit.

[ChrisCar6]

Not all 24v ECUs had immobilisers. 164 ones for example.
Squadra Tuning in the Netherlands do chips for the ECU and may have some knowledge.

[exige300]

Thanks for that guys. I realised the questions were a bit `specialised` to say the least!

I hadn`t intended using A/C so no problem binning the mounting. I intend to use that area to mount the alternator anyway! The brace would be a bit more rigid bolted up to a casting (of some sort) than dangling on the end of a tubed stud.
I`ve still got the donor car but was fighting against having the immobiliser or indeed any more black boxes than absolutely neccesary! ( Particularly if I also have to have the Alfa key/change the steering lock). I have had an ECU from a Peugeot de-coded in the past by the ECU doctor so may try that.
The engine definitely had EGR, I had assumed all the 24vs did. However, if it`s not common, it would explain why the pin chart didn`t identify it. It`s now destined to end up in the same box as the evap canister and , hopefully, the immobiliser!

Again, thanks for your help.
Simon.

[ChrisCar6]

I have the following:




pin 37
size 1
LT BLU-WHT
goes to L46
EGR control solinoid valve



Not sure where the following comes from, or what variant it is about.

[ChrisCar6]

Also useful:

[exige300]

That's fantastic. I appreciate you digging out the info for me. THANKYOU.
When I can get back to it, I think that`ll allow me to complete that part of the jigsaw!
Six weeks ago, a set of webers and a distributor conversion were looking tempting, however, you just have to keep whittling away!
Thank you again.
Simon.

[exige300]

Just to conclude:- Not unusually, all the info available doesn't tie up completely! However, by making a few assumptions, I`m fairly sure the ECU pin that is designated immobiliser was not connected. If I get brave, I`ll swing the engine over and check for spark/injector signal!