alfa 12v wiring

[lyndon]

does anyone know what Unit G131 is from pin 16 on the ecu and the Blue wire from Pin 19,I was hopeing to get it running this weekend but can't get spark or fuel pump when cranking over, auto electrician calling tomorrow and would like to know just in case he ask's why they are not connected to something, Lyndon.

[strat6v]

Shows them both as earths.

If you are looking at a motronic diagram it shows an earth symbol on unit 131

If you dont have a diagram, pm me an email address so i can scan in and mail you the drawing.

John.

[mudhut]

G131 is a ground made onto the plenum chamber (I think it is this) at the timing belt end. There are two of them at this point.
Can'thelp with the ECU wiring, sorry - mine's a 24V.

This pic (http://www.alfapower.nu/gallery/album666/aaa?full=1) is quite helpful as it's so very large in size - worth downloading even though it's not in English.

HTH a bit.


Edit: this pic actually shows what everything is connected to as well - just noticed it!

[strat6v]

Wow!! Nice find Peter. :cool:

[lyndon]

Thank's John & Peter,
Confirms what it said on the basic info from my friend's c.d although no where as comprehensive as this diagram; now trying to figure out how to get it into A4 print,
thanks a load, Lyndon.

[chris.richard]

can't get spark or fuel pump when cranking over

Crank sensor? On the 24v the fuel pump only comes on when the ECU senses the crank turning.

[lyndon]

It's the same on the 12 valve,
Lyndon.

[jadefarms]

Small print, just about readable, printed out at A3 size!
V. useful diagram...
Struan :)

[strat6v]

Does it work then? :)

[Matt No VAT]

I use AutoData 2005 which covers stacks of cars including all models of alfas, it covers 164's 3 ltr ALL engine versions of 12v and 24v etc.

This is the best method of checking out wiring/pin outs as you get a visual of the ECU 35 connector, run the mouse over the pin and it tells you everything you need to know about that pin.

I've tried to attach a print to file so everyone should be able to read it if they are running Windows but this site won't support uploads of Microsoft .MDI file extensions and if I put it in a zip file I'm limited by what I can upload 100k. :mad:

If you want the pin out tell me what engine your running via PM and give me an email address and I'll send it to you direct. I need to know 12v or 24v. If you have the engine code even better 064.10 / 064.12 etc etc

[lyndon]

:confused: Sill no spark!, checked wiring diagram and only thing that is different is in stead of black &green to +on coil we have taken the hawk supply direct which they say to connect to black&green, coil tested and crank position sensor tested,both o.k but should the coil get warm after a short time with the ignition turned on,also tested voltage on coil which read's +1.9v and -9.5v,could someone tell me if any of these are wrong and if so suggestion's to rectify,
Lyndon.

[kolynos]

Hi Lyndon:What have you chopped? I made a cock up on the fuel pump & ecu relays even after taking a pic & drawing a diagram,its so easy to make a mistake,otherwise as long as everything was working o.k. pre engine swap then it should work[famous last words]....
Dave

[alfaspence]

Hey Lyndon! iam new here, allthough i don't have a Stratos, i run an Alfa 75 (was 3ltr 12v, but now 24v)
i also have a complete set of 12v ancillaries (loom, ecu's, fuel rails, injectors etc) plus i have wiring diagrams and the such (before anyone flames me, iam here to share info, not peddle my stuff!!)
What iam saying is this.... if you get stuck, i have the resources here to (hopefully) answer any questions.....
Spence

[alfaspence]

:confused: Sill no spark!, checked wiring diagram and only thing that is different is in stead of black &green to +on coil we have taken the hawk supply direct which they say to connect to black&green, coil tested and crank position sensor tested,both o.k but should the coil get warm after a short time with the ignition turned on,also tested voltage on coil which read's +1.9v and -9.5v,could someone tell me if any of these are wrong and if so suggestion's to rectify,
Lyndon.

Black and green wire? (quite high amp) that is the possitive feed wire from your ignition switch (on 75 that is)
have you got the ignition module mounted with the coil? (only a thought)
how much of the L jet system are you using?

[lyndon]

Spence,
It's the Bosch motronic system, so may be different,
Lyndon.

[alfaspence]

Spence,
It's the Bosch motronic system, so may be different,
Lyndon.

If i recall correct, theres not alot in it! (i also have the motronic running systems from the 24v and t spark also)
What does concern me is the fact that when running motronic on other vehicles, there may not be provision for the "engine managment" lamp in your instrument cluster, nor the plug for diagnostics.
Meaning allthough the engine appears to run fine, (i know not yet in this case) without any warnings you could never know theres a fault! the engine will then revert to "limp home" mode with as much of a cut in power of 50-60 bhp :eek:
As a consiquence of the above, i now have aftermarket engine managment.
Where abouts are you based Lyndon?

[alfaspence]

Just another thought, several of the "Bosch" plug connectors are the same (meaning you can plug knock sensors etc where crank position sensors should be etc)
Iam not accusing anyone of not knowing what they are doing, but please check this is not the case as its easily done (particularly 24v)

[Patriq Backlund]

G131 is a ground made onto the plenum chamber (I think it is this) at the timing belt end. There are two of them at this point.
Can'thelp with the ECU wiring, sorry - mine's a 24V.

This pic (http://www.alfapower.nu/gallery/album666/aaa?full=1) is quite helpful as it's so very large in size - worth downloading even though it's not in English.

HTH a bit.


Edit: this pic actually shows what everything is connected to as well - just noticed it!

Hey, this description is in Swedish !
:-)

[chris.richard]

What does concern me is the fact that when running motronic on other vehicles, there may not be provision for the "engine managment" lamp in your instrument cluster, nor the plug for diagnostics.
Meaning allthough the engine appears to run fine, (i know not yet in this case) without any warnings you could never know theres a fault! the engine will then revert to "limp home" mode with as much of a cut in power of 50-60 bhp :eek:


This doesn't seem to be a problem Spence. We'd notice the limp home mode power drop start investigating then. I kept the diagnostics plug, and have used it once or twice to ascertain rpm independent of the tacho.

[lyndon]

I checked colour' s of cables before mating up to any plugs but as per a very comprehensive thread by Arthur some time back I have discarded the third Moytronic relay which means I am only using the two mounted with the coil pack and linked out the auto/manual switch from the ecu direct to earth as it follows this route from this switch. Spence, I live 12 miles from Cardiff.
Still can't see the wood for the tree's me think's
Lyndon.

[alfaspence]

Spence, I live 12 miles from Cardiff.
Lyndon.

Typical :rolleyes: would have suggested coming to have a look.... but as i live in Ipswich.... (opposite side of the country :mad: )

Doh, just clocked your location :o (south Wales)

[lyndon]

Spence , Well at least your answer brought a smile to my face,
Lyndon.