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Old 08-22-2004, 01:29 PM
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Timing problems

Hey guys, maybe you can shed some light. I have an Accel HEI with the super coil on my 350, it's about a year old. For some reason my timing keeps jumping around, I'll set it a 12 BTDC but it then after a while it moves all the way up to 18 and the strange thing now is that when I try to bring it back down to 12 it won't run. I've made marks to see if the dist is just coming loose and moving but that's not hapening.

Any ideas?

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Old 08-22-2004, 01:49 PM
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1) The timing chain is worn.......BAD and allowing the timing to move.

2) The vacuum advance is worn and sloppy

3) the plate is worn and sloppy.

How many miles on the engine??

DEUCE.General Rodding Tech Moderator........

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Old 08-22-2004, 01:54 PM
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4900 miles on the engine. I have the vac advance dissconected.
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Old 08-22-2004, 04:20 PM
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Distributor

[color=orange]Doc Here

The Engine Sounds pretty Fresh, How old is the HEI?

Check it for worn Gears, Drive Gear pin Sheared and slipping, or Slop in the shaft (up down and sideways) Check the Mag Pickup for movement.

Is the Cam new too?
Look at It down the hole with a pen light and inspect it's gear for broken , worn or missing teeth, and metal shavings.

Hope it helps!
Doc
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Old 08-22-2004, 04:24 PM
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What about the condition of the balancer?

I recently had the crank bolt break and it sheared the woodruff keys. Timing was bouncing all over.
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Old 08-24-2004, 08:36 PM
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It looks like the gasket/seal is starting to work it's way out on the balancer, could that be throwing things off?
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Old 08-24-2004, 08:39 PM
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Well, pretty soon the thing will fly off and kill someone!
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Old 08-26-2004, 08:10 AM
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I've seen it at 60 mph on the expressway..! Some clown in the left lane was crusing and all of a sudden this HUGE chunk comes whaling out from underneth his car and cut across three lanes!!! He eventually came to a stop and luckly that balancer didnt hit or kill anyone !!!!
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Old 08-26-2004, 03:59 PM
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Balancer

Doc here[color=yellow]

Not to mention the fact over time if it dosen't fly off, It will tear up your Crank / bearings / Seals..


Doc [/color]
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Old 08-26-2004, 04:06 PM
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Good Brain Food..... guys,,,,,,,,,,,,,,,,
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Old 11-17-2004, 11:53 AM
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I hope you have resolved your timing problem by now. I just wanted to give my 2-cents experience regarding the Accel HEI distributor. The Vacuum advance, AH15, is notorious for sticking. I had to replace mine twice in the past four years because of the very same symptoms that you described.

I'm new to this forum and I hope that all of you can help me now and in the future as I shall try and give the best possible advice myself.

Regards
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Old 11-17-2004, 08:24 PM
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first replace your balancer they get old and tend to "walk backwards" then check your mechanical advance to see if its stuck i have had that truble as far as vacum advance on the rod it has a number stamped on it telling how many degrees it will advance it timing chain can trow it off to but check the distributer gear for wear check the easy stuff before tearing into things
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Old 11-17-2004, 08:46 PM
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Thanks guys. I changed the balancer and all is well.

I do plan on changing the accel for a msd unit.
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