I really appreciate all the help I've received on this board in my quest to build and install a 200 in my 62 Comet. Well, the motor is in...I had a problem with temp and a rod hitting the pan, but those are fixed (new thermostat and pan). Now, however, the engine runs rough, lacks power, and slight knocking noise that correlates to rpms, but not in upper valve train. Here are the symptoms and what I've checked/done:
1. Hard starting...starts much easier when timing is over-advanced
2. Idles fairly smooth, although you can hear random but continual missing
3. When throttle is partly-opened, the knocking noise appears--not severe, but noticeable
4. When out on the street, car will sputter, lacks power, runs rough. However, it seems to be different each day. One day it seemed to run fine except for the noise. Next day, it sputtered too much to drive.
What I've done...Engine was redone with all new parts, except bearings and rings, which seemed ok, done about 30k ago.
1. Distributor, points, coil, wires all new. Timing set, dist installed correctly
2. Carb is good, even tried a second carb. Fuel pump new and good pressure
My next step is to possibly check for bad condenser, and also do a compression test. One mod I did make is that I put on a non-adjustable rocker set. The engine, when it was rebuilt earlier, had hydraulic lifters WITH adjustable rockers. One outside possibility is that the head may have been milled, and maybe I need to put the adjustables back on to get proper pre-load. Thanks!
1. Hard starting...starts much easier when timing is over-advanced
2. Idles fairly smooth, although you can hear random but continual missing
3. When throttle is partly-opened, the knocking noise appears--not severe, but noticeable
4. When out on the street, car will sputter, lacks power, runs rough. However, it seems to be different each day. One day it seemed to run fine except for the noise. Next day, it sputtered too much to drive.
What I've done...Engine was redone with all new parts, except bearings and rings, which seemed ok, done about 30k ago.
1. Distributor, points, coil, wires all new. Timing set, dist installed correctly
2. Carb is good, even tried a second carb. Fuel pump new and good pressure
My next step is to possibly check for bad condenser, and also do a compression test. One mod I did make is that I put on a non-adjustable rocker set. The engine, when it was rebuilt earlier, had hydraulic lifters WITH adjustable rockers. One outside possibility is that the head may have been milled, and maybe I need to put the adjustables back on to get proper pre-load. Thanks!