Ever since the new fuel pumps were put in and all of the rubber hoses were changed, the fuel pressure warning light (”Alimentazione”) have been flickering.
After turning on the ignition, but before starting the engine, it is solid lit. When the engine idles, it flickers. It’s usually off when you cruise along without exploiting the engine, but once you step on the accelerator pedal, it lights up. When I turn on the headlights, the warning light stays on almost all the time.
Now, the warning light is supposed to come on when the fuel pressure falls below 0.5 kg/cm2, and the nominal fuel pressure in the vicinity of the sensor should be 1.5 kg/cm2. Something is (seriously) wrong with the fuel system, and I don’t really have any good ideas about what it might be. As mentioned, the fuel pumps and all the hoses and filters are brand new. The battery is a few months old, and the alternator amperage stays just above zero when driving.
Since it seems to get worse when the headlights come on, I thought it could be a voltage drop at the pump terminals. I made a separate ground line from the battery chassis ground connector to the pump ground terminals, but it didn’t change anything. The pumps are supplied 12.0 volts now (like they should), but the symptoms are exactly the same as before.
I think I’ll have to do a full ignition, throttle and Spica adjustment again to verify everything’s in working order. La Tempesta has an appointment with the vehicle authorities (Statens Vegvesen) on 31. May, and it’s a two hour drive to get there. I probably shouldn’t drive anywhere at all with low fuel pressure, even though it’s probably safe-ish to do so in the relatively low temperatures we have around that time.
Another thing I discovered today: the seats needs to be fixed sometime. The car is full of dry, yellow dust from the seat cushions, even though it was thoroughly vacuumed and cleaned a few hundred kms ago.