papaindigo wrote:
2 thoughts
1. if a previous owner installed an inline lift pump in the engine bay you can find it by tracing the inflow/outflow lines from the fuel filter. However, if the key is switched on but the engine not started a lift pump should only run for a few seconds, to pressurize the line, and then stop and stay stopped unless the line(s) are leaking.
2. a constant buzz might be the flow control valve, bad gear, located where the right, viewed from the front, intercooler hose connects to the intake.
thanks for the reply. yes i think its the flow control valve. have just read up on it and it seems to smooth engine shutdown amongst other things. haven't noticed any rough shutdowns yet but the buzzing/whirring noise would suggest the gears are failing from what i've read. lots of people seem to think you can do without it as its such an expensive part. i'll research more into it as its all new to me but thanks for pointing me in the right direction