Thanks for that, the engine doesn't start so I can't really test it that way. There is no wire going to the ECU that I can see - 2 disapear above the fuel tank, one goes to the + feed and one goes into the bulkhead (I'm now assuming this one goes to the ignition?). I have disconnected the + feed to the black relay and the fuel pump ran for a little while and the car started but then cut out and the original condition of the brown relay buzzing returned. I'm a bit stumped.wheeler wrote:Yeah the brown double relay is a combined fuel pump & engine management system relay.
I'd agree with malcolm here, it's begining to sound like the relay has been fitted to mask a problem with the fuel pump control, start the engine & disconect it, if the engine cuts out a second or two later it will almost certainly be wired to the fuel pump.
Not really a big problem as long as its been done right, ie the signal from the ECU is used to earth the relay, if its not done that way it could be bypassing the saftey featre of the ECU controled fuel pump that doesen't allow the fuel pump to run unless the engine is turning (apart from the initial second or two prime)
Oh yes and in addition the brown relay buzzes sometimes when the ignition key is not even in.
