I borrowed a compression tester today and decided to check the engine out this afternoon when my other plans fell apart.
I warmed the engine up and re-adjusted the timing by ear (like the guys on www.willysmjeeps.com told me to do). Got her running pretty smooth again and adjusted the carb again. Then I pulled the plugs out to do the compression test. The plugs were black and sooty. I tested each cylinder twice – here’s the readings for the 2nd time: 137, 77, 125, 130. When I re-assembled the engine, I thought that #3 had a stuck exhaust valve, but I guess it was #2 by looking at the readings. I guess it DID come back to haunt me! I cleaned the plugs and put them back in. That also explains the low power I was experiencing while I was driving around yesterday – I thought it should have had more pull going up hill in 1st gear!
Next I did a manifold vacuum test (you can tell all kinds of stuff doing this test – when done right). The readings I got were pretty low compared to what the manual says (or it could mean that the engine isn’t timed right). Also, the needle was jumping around a lot while the engine was cold – which means a valve is sticking (#2 exhaust valve). The low readings could also be because I didn’t hook the meter up at the right place – I asked the forum about that already.
Well maybe tomorrow I can get the gas tank done (the big thing I have been dreading and putting off for the last 4 months!