Re: The Manhattan Project
Posted: Tue Aug 13, 2019 12:30 pm
Hi John, yes the blocked fuel line showed up in the system pressure test. When I first tested the CIS I did all that off the car, but had tested it again when the engine was refitted and first run in the car. Sadly it was when I refitted the engine after fixing the bent clutch arm that I introduced the fault - which then killed the FD and the subsequent rebuilds until I spotted the error.jjeffries wrote:Thanks very much for documenting this; I have an 82 SC and am a CIS appreciator so all relevant and fascinating content for me.
Would the blocked return line have showed itself in fuel pressure tests (as shown in Bentley, CIS manuals, etc)?
How are you measuring CO? I put an AEM gauge in mine, but now keep a cover on it because I don't need to be looking at it all the time. That in turn makes me think a decent sniffer would be better...keep it in the garage and use it on any car.
Your car is stunning.
Best, John
I am measuring CO myself with a Gunson Gastester which puts you in the right ballpark.
The spec for the car is 1.5 - 2.5% but I'm currently running fractionally richer to reduce a bit of popping on lift off.
The car runs pretty well but has an occasional slight hesitation in the 2K-3K range. It idles really well and above 3K it races to the redline pretty rapidly so all good there.
Now reading around some people say the cars were delivered in '74 with this 2-3K hesitation problem from new as CIS was quite immature, whereas others seem to be able to fix it by tracking down an air leak or changing the timing map, etc, etc.
I've just bought a smoke machine to see if I can identify any air leak, and then I was considering trying a 123ignition distributor in the future, as I may be able to map out the hesitation by adjusting the advance curve.
At the weekend I swapped the distributor cap and rotor. I was running a 7k1 rev limiting rotor but swapped it out to a 6k5 one I had bought. However I had bought two rotor arms and neither worked as both were open circuit! ( You can't trust new parts to work out of the box ). I put the 7k1 back on and the car seemed to drive better again with the different distributor cap.