Noticed the fuel injection electric pump was very loud today, so thought perhaps the fuel filter is getting clogged up. So removed the filter, bit of crud inside but had a new spare so popped it on. Pump still loud so took of the feed pipe off as it was now leaking a bit and noticed the end of the pipe was cracked, cut off a 5cm length and refixed with a new fuel line clamp and hay presto back to a quieter pump! Rest of pipes looked ok and changed last year.