I have 156, 1999 model.
Problems are listed below:
1- Car doesnt go faster than 130/140 km.
2- Also acceleration is really very very bad at low gears (1-2)
3- When going uphill with 90 km, I changed gear 4 to 3, than engine starts to screaming but there is no difference at speed.
After these problems, I changed, MAF sensor, spark plug cables, idle air valve, spark plugs, coils...
Result = 0
I have open air filter (K&N)
When I first changed MAF, it was better for 1-2 days.
I have never done ECU RESET. Some people offered. But I tried it with disconnt batter 45 min method for 5 times. But I couldnt reset ecu with this method. I dont know why...
Now I have 2 questions,
1- What happens to these problems listed as above?
2- Can fiat ecu scan software reset the ECU? if not, how can I do this if necessary?
Thanks a lot...