[placerville]

Hi all,

In regards to my 1974 911, 2.7 liter, stock. I’ve been troubleshooting some problems with the CIS and I’ve run into a big one – I think. The System Pressure is low by about 1 bar. I put a few shims in the pressure regulator – in the fuel distributor – but that did not seem to make any difference. I would add that fuel flow – as measured at the fuel return line – is low. While not a test procedure in the book, I measure fuel flow out of the fuel accumulator and it is considerably more than I get from the return line. I have replaced the fuel filter – that did not have any impact. I’m thinking weak fuel pump, but before I go out and spend $350 on a new one I thought I’d ask for some advice.

Thanks in advance!!

Mike