Technical Help needed starting 95 B

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Technical Help needed starting 95 B

Lluis Elson

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Joined
Jul 11, 2025
Messages
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Points
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Location
Lleida
Hello everyone,

I have a 95 Barchetta that we have rebuilt the engine. The entire rebuilding process has been completed and several old components have been replaced such as the cam opener, the clutch and sensors. Everything is assembled and ready to start,but the car don't start.

When the ignition is turned on, the injection error light and the code key light come on. We have tried to connect the ECU using multiecuscan and KKL cable to check and clear errors, but we are unable to do so. However, we can connect to the airbag and ABS units without problems.
Having ruled out a connection, program or cable problem, we have checked the ECU contacts, wiring and even bought a new ECU to see if this was the problem. The fuel pump has also been checked and it works fine. But nothing has worked.

The car still won't start and we don't know what else we can check.
Any ideas or clues would be welcome because right now, we don't know what else to look at.

Thanks in advance,
 
Model
Fiat Barchetta
Year
1995
Mileage
84506
If you using a 3pin adapter to connect multiecu scan the locations of the plug in vehicle are different for each ecu. The air bag ecu plug is in different place to engine ecu diagnostic plug.

I'm not barcetta expert fingers xed someone who is will join in.
 
If you using a 3pin adapter to connect multiecu scan the locations of the plug in vehicle are different for each ecu. The air bag ecu plug is in different place to engine ecu diagnostic plug.

I'm not barcetta expert fingers xed someone who is will join in.
Yes, we found then and tested. But the only one that don't work was the ECU connection
 
It is possible if wiring plug connected to wrong sensor on engine to cause no communication with ecu.
With the work you have done is it possible wiring connected incorrectly?
 
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