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Help!!! fresh rebuilt won't start. |
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White70JavelinSST
Supporter of TheAMCForum Joined: Aug/08/2012 Location: Minnesota Status: Offline Points: 4866 |
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Cheapo distributor, Try a factory distributor first, then switch to an MSD Ready to Run Billet Distributor. I installed one on the WhiteJavelin. It doesn't seem to care about the incoming voltage being reduced by the resistor wire. Edited by White70JavelinSST - Jan/03/2018 at 4:14pm |
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70 Javelin SST, second owner, purchased 1972
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SKeown
AMC Addicted Joined: Jul/30/2009 Location: Texas Status: Offline Points: 3085 |
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Popping sporadically sounds like the valve timing is off. Rotate to true TDC on #1 and check if both valves are closed on that cylinder. SKeown
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motorhead_1
AMC Addicted Joined: Apr/16/2014 Location: AZ Status: Offline Points: 1006 |
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cam not ground correctly? not degreed?
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69 SC/Rambler tribute 401/th400, 68 Rebel SST LSA, 66 F100 460/c6, 88 Merkur Xr4Ti, 71 Jaguar XJ6 LS1, 08 Supercharged Tundra
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SKeown
AMC Addicted Joined: Jul/30/2009 Location: Texas Status: Offline Points: 3085 |
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Possibly, I've seen it before, a keyway off on the cam or one of the sprockets. That's why cams (particularly aftermarket) and timing sets should be checked by "degreeing" |
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THE MENACE
AMC Addicted Joined: Nov/04/2008 Location: So. California Status: Offline Points: 4439 |
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X 2 on what Steve said! |
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Former Owner of:
The Craig Breedlove "AERO AMX" Still Owner: SS/AMX #9 replica (THE BIG MENACE) 70 AMX 416, EFI, Nash 5 speed 70 Javelin 401, 727 (Wife's car) 72 Gremlin Autocross Project. |
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Jay68SST
AMC Apprentice Joined: May/23/2016 Location: Arcadia, KS Status: Offline Points: 189 |
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Looks like I will be removing the valve covers and make sure the valves are closed when TDC for each cylinder. Pushrods are stock length, so that should not be the problem. When finding TDC for#1 to set timing, I took the spark plug out and placed my thumb over and I could not keep my thumb over the hole while the engine turned over, I guess we will see this weekend.
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Quick compression check first.
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Gremlin Dreams
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dbomb
AMC Addicted Joined: Jul/22/2012 Location: new jersey Status: Offline Points: 705 |
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I'd check compression like Boris says also with plugs in and choke closed hookup a vacuum gauge see if it makes vacuum while cranking. If it doesn't. Try to loosen valves a turn or so. Block off all external vacuum points to brakes and pcv and stuff Or if it's been rebuilt long long ago squirt some oil in the cyls see if it improves. Sometimes you can get dry cyls or cyl wash from a droopy carb washing oil off cyls Old timers used to smoke a ciggy and put ciggy over carb to see if engine would pull the smoke in while cranking. Was a good parking lot test to see if timing chain jumped. I know you stated you followed Tsm instructions but it's possible that the intake is leaking underneath or valves are not ground correctly like seats and valves cut at wrong angles. If it's been apart for a long time Could there be critters living in the exhaust?? Good luck
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rebuiling 73 amx need parts
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dbomb
AMC Addicted Joined: Jul/22/2012 Location: new jersey Status: Offline Points: 705 |
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Sorry didn't see open headerscomment
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rebuiling 73 amx need parts
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dbomb
AMC Addicted Joined: Jul/22/2012 Location: new jersey Status: Offline Points: 705 |
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Make sure vacuum secondaries are closed when cranking if they are open it won't pull enough fuel to start
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rebuiling 73 amx need parts
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