EFI problem with 1993 Eurovan

[patallen]

I all, first post here.
i have a strange problem with a eurovan, 2.5L, the ones without air flow meter.

The van only works semi ok with the vacuum reference at the ECU disconnected.
Of course it runs rich but at least it is possible to move it.
Otherwise it stalls, puffs, idle inconsistent,...

My first quest here is to know if there a simplified wiring diagram of this digifant type EFI system ?

I am electronic engineer and can dig very deep in there but i need your help finding proper diagram and ultimately ECU pinout.
I already swaped known good ecus and eeproms to no good results so far.

Tested temp sensors and all others too and seems ok so far.

Wiring seems ok so far. all grounds are good and clean.

thanks very much in advance.

[wildenbeast]

This link should have what you need:
https://docplayer.net/21163209-1993-wiring-diagram...rovan.html
_________________
- Bill, '93 Eurovan Syncro Weekender (2.5 manual ACU)

[patallen]

[patallen]

fwiw found out the problem to be defective map sensor in all of the 3 ecus i had loool...

found out this very interesting info

https://www.t4-wiki.de/wiki/Geber_G71_(Saugrohrdruck,_Benzinmotor)

and also found out that i had some of theses sensor in stock, i am electronic engineer so this helps.
The van now works like a f champ.

thanks.

[subdewd]

Nice

[bunkbed]

Was replacing the MAP sensor as easy as de-soldering the old one and soldering in the new one?

Also, how did you go about determining that the MAP sensor was bad in your ECMs? I'm getting a "no MAP signal" code from my VCDS scanner.