Hello all,
Don't know if anyone can help out with this technical question but worth a try.
The Subaru Fiori maybe called 'Rex' or 'Ace' in other countries, not sure. Anyway this one in Australia has the 758cc engine.
We have a 1991 Fiori, unbelievably great little trouble free car up until a few days ago. She just stopped, so we called the NRMA (mobile mechanics) and the guy said the fuel pump has packed it in. We have a service manual for it, so I had a look at the drawings and see that the pump gets it's power from what is called a 'Revolution Sensor' which in turn receives a signal from the coil. The 'Revolution Sensor' has a circuit board inside which means it is all quite complicated (computerised so to speak). Tested the power from the 'Revolution Sensor' and it gets 12 volts ok but no amperage? Anyway, to make a long story short, I tested the pump with a direct 12 volts and she works fine. So I tried to find a new or second hand 'Revolution Sensor'. In NSW there are none in existence. The dealerships say they are no longer in stock and the wreckers have scrapped all the bodies, whilst keeping only the 'quick selling' parts. The sensor box is mounted under the dash above the fuse box (about the size of a small pack of cigarettes).
So my question to you all I guess is, do you know if it's ok to run a permanent power supply from downstream of the ignition system to the pump, i.e., the pump would be running flat out whenever the ignition is on, without any variation in petrol supply from idle to maximum revs? It has a fuel return line to the tank so in principal it may work but what worries me, is that they went to so much trouble designing this 'Revolution Sensor' that I may be overlooking something.
Thanks in advance everyone for any help or advice,
Graham