[jameshurst71t]

Hi guys, I have a 71T with 2019 rebuilt motor that’s now 2.2S Ps and Cs and solex cams topped with PMO 40, new Bosch CDI, old Bosch dizzy, new wires and older Pertronix.

For the last few months since I leaned out the carbs, (low 9-10 AFR on WOT hence moved to 130 jets, 190 airs, F16 etubes) I have had intermittent starting issues. Car cranks fine (newish starter) but it won’t catch like it used to nor start smoothly. I smell a little gas so it seems to be pumping. I can see gas in the PMO port holes. I pulled the plugs and they are gray(too lean), the dizzy cap copper connectors are greenish. CDI box is freshly rebuilt, Beru wires are new. S rotor and Cap are from 2019. I reset PMo to 125 jets, 170 air and F11 tubes to enrich it. Still the car cranks but not a great start and sometimes crank and no start.

Do leaned out and gray spark plugs need replacing? How do you know if your dizzy is failing? that part is old for sure. How do you know if your old Pertronix is failing?

My gut is replace plugs, cap, then go to 123 Ignition for 2.2S and see what happens.

Does 123 Ignition replace pertronix igniter as well?

Worst case thinking tells me I leaned out the motor too much and I’ve ruined the cylinder walls, or such so I would feel better to do a leak down and compression test to feel better.

What do you think is causing the car to not start?