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There's grounding wire. I am stumped, plugs have spark, i checked distributor by putting test light on pos side of coil and grnd side when I turn it over light flashes like its supposed to. Is it possible it jumped a tooth I think somebody said that in one of the previous post and if it did how is that possible? It started yesterday by rotating dizzy all the way in one direction but couldn't turn dizzy any further to keep it running.
When the engine gets some miles on it, the timing chain that connects the cam and crankshaft can jump a tooth or two. This changes the valve timing.
You can check for this generally by turning the crank over until the #1 cyl. is at TDC on the compression stroke, and note location of rotor in relation to the #1 tower on the distributor cap. Should point right at it.
Everyone on here is really really smart! Someone had said early on that dizzy may have slipped....I got it started by moving dizzy clockwise about an inch I couldn't move it before because a hose clamp to water pump was in the way. However when I put timing light on it, it won't stay running when marks are lined up?
Somebody who knows more about '72 dampers will have to weigh in on that. Don't know. Damper replacement is the cure, though if that's the case.
Replacement of the timing chain set isn't TOO bad, you'll want to verify this is the problem, though. Again, better ask someone who is more up to speed.
The stock oe timing gear had nylon teeth so it would not make any noise.
After about 100,000 miles and if engine ever had gotten some what hot it would shorten the servable life span and then slowly teeth strip off around the timing gear.
This causes the chain to much slack and can cause the chain to slip a tooth or two.
This is how the cam can jump timing. Some guys say your dizzy jumped timing but it's the cam timing chain.
Most of the time you can put a socket & breaker bar on the crank bolt and slowly move back & fourth to see how much free movement the crank turns with out turning the cam it self. Easy test.
Also when the engine is running the timing mark flow around due to the play in the chain. If it's bad enough you can head it slapping in the timing case.
Yes it did, I bought it January 3rd and it ran fine for the first 30 miles on the way home and it progressively got worse, lose of power and began to run rough and died 6 miles from my house
Check for a loose timing chain by moving it back & fourth with a socket & breaker Bar.
If it's jumped only thing you can do is try resetting the dizzy. Piston at TDC pull the spark plug crank engine over until with thumb over spark plug hole to find TDC. use a helper if needed.
Check pulley mark align with case timing pointer so it's at TDC. Check dizzy and move one tooth if needed.
Orich
If it has jumped timing, then what needs to be done is not simply reset the dizzy. The timing set needs to be replaced and cam timing brought back into range. If cam timing is wrong it won't run good if at all.
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