Hi there. I have a rough idle on Fiat 500 2014 1.2 petrol (manual gearbox). One of the things I suspect is fuel pressure as some fuel pumps specifications say it should be 4bar meanhile others say 3.5bar. I tested fuel pressure and got 3.5bar but concerned if there is a decline and it fell from 4 to 3.5 just by coincendance. Cylinders compression test is ok (from 13 to 14 bar, cold engine )
Question : what is the fuel pressure on the similar car with no rough idle issue?
PS spark plugs, coil pack, ignition leads, oxygen sensor, were replaced for new. Also tried another used throttle body with no effect.
Question : what is the fuel pressure on the similar car with no rough idle issue?
PS spark plugs, coil pack, ignition leads, oxygen sensor, were replaced for new. Also tried another used throttle body with no effect.