Quote:
Originally Posted by bmodeltman
Mine ran the same why you describe. It sat for.a long time. Got it running and it was ran on 2 cylinders and was back firing found 2 exhaust valves stuck open. Got them unstuck and it ran on all 4 but missed when accelerating. Did all.them same things you tried. Figured it needed it anyway hoping it would be something easy. Tuned it up and went through the carb. I checked jet sizes. I found the GAV did nothing when adjusted. I tried the sea foam trick and that just made a lot of smoke. I decided to pull the head and lap.the valves in. I took the valve springs out and kept them.in order they were removed. Found the 2 stuck valves the springs were quite a bit shorter than the others. They must have taken set to that height. Did a.search on here and got spec's.and found the springs were half the pressure at height than they were supposed to be and the others were weak also. Found a set of springs that were right on for pressure. I lapped the valves In and adjusted them put it together and it's a totally different running engine. The GAV now works right. The engine needed everything I did to it anyway but a vacuum gauge would have told me it was valve related. I would do the valves and check your springs. It fixed mine.
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Thanks so much for your input. My Gav also seems to not have any effect. I’m thinking about doing the valves as they have probably been in there since the 60’s. Did you use modern or original valves??
I seem to go from one issue to another. I put a fuse on the starter and it kept blowing fuses so I bypassed it and today the starter quit so I’m getting a rebuilt one.
Dave