Work on my MG BGT has had to stop as it is now driveable and road worthy so I thought I would get back to the P6. Last Saturday I put about 10ml of oil down each cylinder and did another compression test and the numbers were 1 = 180 psi, 2 = 165, 3 = 160, 4 = 180 so suspect valves not closing properly, or stem seals, though I would think worn stem seals would show on exhaust emissions.
I have re-installed the points and set the gap to .016in. New plugs fitted, tried starting it and it turns over very fast and tries to start. This is probably not the best thing to do but when turning over by starter if I press the throttle it revs up and when I release the key it cuts out. I'm wondering if the starter switch may be faulty. Any comments welcome.