I've got a 2003 147 Sele that i'm having some fun and hoping that someone here can help me.
The problem with the selespeed is that the s/s ecu thinks the clutch disk temprature is too high and starts to flash a fault when the calculated temp reaches 160deg. C.
I checked the clutch and its definately not slipping at all.
I've replaced the clutch speed sensor as well and completly rewired the sensor direct to the ECU and this has not cured the fault.
Replaced the s/s ECU - same fault
checked the AFM and external temp readings - OK
What i have noticed is when driving at a constant cruise the clutch speed signal drops out completely for a second and then works fine for around 15 secs, drops out again and then fine for 15 - 30 secs and the cycle repeats. Each time the signal drops out the clutch tempreture rises dramatically, because the S/S Ecu thinks its slipping.
What could cause the signal to drop out like this?
My friend is an ex Alfa DET and he doesn't know, i've tried the s/s specialists in germany and they also don't know.
I suspect one of the coil packs could be shorting out and spiking the signal, but this would affect the rpm sensor as well. Rpm signal seems fine.
I'm at a total loss with this one, can anyone help??
Good bottle of whiskey to whoever comes up with the right fix!