immobiliser fault on a 164
my 96 3litre 164 has been at a main dealer for 3 weeks with an unsolved immobiliser problem .[had to use dealer because of key code issue.]
symptoms .are key code .engine management and alarm light showing on dash.
no power going to fuel pump connector but punp works if fed directly
engine turns over .spark ok ,fuel cut out ok.injector pulse ok.
has anyone any experience which could help a new dealer who is fumbling in the dark at my expense.and having to resort to obtaining old wiring diagrams from alfa gb
no immobiliser fault code listed for m1.7 system .
all keys available.
already lost a 89 3l to electrical gremlins in past year/
and low mileage t/s stolen