hi all . i have a 1997 1.1 sporting cinquecento and have been told the ecu is cattle trucked . can i just change the ecu or do i have to chage the code box and key aswell thanks a lot lads and lassis

if you're buying a new one from fiat, no you shouldn't need to change it.

if second hand, you need a matching key and code box - or get it the ECU virginise.

who told you it was faulty btw? I can't recall an ECU of this type failing being reported on here. They're dumb and robust.

a local garage . there concted the car to a diognositc pad . the prolem that i found as 1 coil is only geting 3.5v feed in to it

the coil is fed by the loom, and is grounded via the ECU. Sure the connections / earths are all good?

ye have disconted cleaned and reconcted . fisrt thing i did after i found the fult . do you know wich pins on the ecu are for the spark and wot the values are for them

pin 1, (white and green wire) is for coil pack 1, which handles number 1 and 4
pin 19, (light blue and red) is for coil pack 2, which handles number 2 and 3.

I don't know what values they're meant to give if you poke the ECU. But i guess if you unplug the ECU and check the resistance of both pins - any signifficant difference would show a wiring / coil fault. If they're the same, it's fair to assume ignition driver in the ECU has expired.

I think this guy; https://www.fiatforum.com/members/reddy4bed should be able to help you out with the ECU, either repairing it - or obtaining a virginised / decoded one.

Just had my ECU back from this guy. Can vouch for the service. Absolutely amazing. Must have posted it same day he got it. Cheap too. Dan

As stated, the ECU switches the earth, and they are fairly bullet proof.

I'd recheck.

Cheers

SPD

spot on lads ta will keep you informed

dont know wot i did but it worked . i took the big concter bock off the code unit and turned it over then disconcted the small one and turned t over once more . them reconcted it and it started . have i some how schoked the ecu or somthng . dont thnk t was the contons had d cheked them three or four times

It's called S.H.I.T...Self Healing Italian Technology.

forgot to say i used the red key