[JCoop]

OK maybe all you experts can help me before I run a big stack of bills for parts. First thing I did was set the fuel pump pressure to a tick over 3 psi.

I've synched the carbs decently in that the meter shows an even 4.5 - 5 equally on the 4 inner barrels at around 800 RPM. I followed the procedure as shown on Richard's DVD. The idle mixture is good and a bit fat at just a hair more than a half turn out on all 8 jets. She idles quite smoothly, a few lean spits when cold but disappears when warmed up, and when I stand on the throttle, she jumps like a scalded cat, much like the immediate reponse on my CL600's injection. Nice power with a seat-of the-pants increase of maybe 10-15 horses. Revs smoothly and pulls strongly all the way up to 6000. The problem is at cruise or a steady rev at around 2500-3200 RPM. She gurgles and pops and misfires until I gun it again. Unfortunately, this is where I cruise generally, 2800-3200 RPMs in 5th and doing 70-80 mph. I decided to change all plugs (Motorcraft ACSF 32C) and a new MSD blaster 2 coil as I wanted to carry a spare anyway. I also checked and reset the timing to 10 deg. advance at idle and 21 deg. max without the vacuum connected. with the vacuum hooked up, that setting read 13 deg at idle and around 41 at 3000. That made the car idle even smoother and acceleration seemed to improve; however, the stumble and popping, misfire persists at the transition points 2800-3200 RPM. Almost seems like it's starving for fuel. Now in reading the several tuning articles, it seems like the emulsion tube is the culprit. Currently installed is an F7. Should I get a F9? Could it be too much advance as well?