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Old 08-29-2011, 10:13 PM   #16
KylePBZ
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Default Re: Timing retarding with locked out dist.

I wondered about that. I've had a couple of bronze gears worn sharp enough they would slice you open and never had any trouble. Keep us posted.
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Old 08-30-2011, 09:04 PM   #17
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Default Re: Timing retarding with locked out dist.

[QUOTE=55sedan;6927610
I sure hope they find something wrong with the box or retard.[/QUOTE]

Dont worry they Wont, but when you put it back in all will be fixed.
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Old 08-31-2011, 08:17 PM   #18
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Default Re: Timing retarding with locked out dist.

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Originally Posted by 55sedan View Post
Well I replaced the gear but still have problems. Now its only retarding about 5 or 6 degrees though.
Saturday night at the track it would sputter intermediately several times each pass.
Sometimes when I crank it, it will sound like its running on 4 or 6 cylinders. The tach will be on 600 at idle. It normally idles at 1150.
It will kick back while cranking & wont hardly rev past 3000 rpm.
You can let it sit a while and crank it and it will run fine.
I have checked all wiring, grounds, etc even put a new ign switch in.
I talked to MSD, they said to send box & timing retard both to them.
It still ran low 10.20s sputtering every pass. Whatever it is it cant be much wrong with it.
I sure hope they find something wrong with the box or retard.

Did you check your timing chain? It doesn't hurt to check and make sure there is no major play in it before you pull your box and send it off.
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Old 09-18-2011, 09:43 PM   #19
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Default Re: Timing retarding with locked out dist.

Any updates on this? I've been busy but finally did some checking and it doesn't look like the cam is moving any and there is no slop in the distributor anywhere. My wires are all correct. Anyone ever have a digital ignition box go haywire?
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Old 09-18-2011, 10:43 PM   #20
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Default Re: Timing retarding with locked out dist.

If you have a crank trigger, make sure the wheel is turned the right direction. It will cause the timing to retard a bit.
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Old 09-19-2011, 08:31 PM   #21
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Default Re: Timing retarding with locked out dist.

Ok, did some more reading and checking. The timing is retarding 8-10*.
I've eliminated the ignition box(Mallory 685, Summit version), switched it with a 7Al2 and it does the same thing.
The distributor(MSD Pro Billet) is in good shape, the end play is correct, the shaft is tight, and gear is good.
I don't think(not 100% positive) the cam is walking, I tried the screwdriver down the dist. hole trick and can see no play when prying back and forth.
After doing a search and reading older posts is could possibly be the pickup going bad or the wire from the box to dist. picking up interference.

I'd just like to eliminate all the easy stuff before I pull it apart to check the cam button/walk scenario. Any other thoughts?
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Old 09-19-2011, 09:15 PM   #22
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Default Re: Timing retarding with locked out dist.

kyle, those msd pickups will do some weird stuff. they are pretty cheap also, it would be worth a try.
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Old 09-19-2011, 09:17 PM   #23
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Default Re: Timing retarding with locked out dist.

Quote:
Originally Posted by KylePBZ View Post
Ok, did some more reading and checking. The timing is retarding 8-10*.
I've eliminated the ignition box(Mallory 685, Summit version), switched it with a 7Al2 and it does the same thing.
The distributor(MSD Pro Billet) is in good shape, the end play is correct, the shaft is tight, and gear is good.
I don't think(not 100% positive) the cam is walking, I tried the screwdriver down the dist. hole trick and can see no play when prying back and forth.
After doing a search and reading older posts is could possibly be the pickup going bad or the wire from the box to dist. picking up interference.

I'd just like to eliminate all the easy stuff before I pull it apart to check the cam button/walk scenario. Any other thoughts?
My 6AL2 box & 3-step timing retard is still at MSD.
I called today & was told to check back Wednesday.
They said it usually takes 15-20 days for turnaround. Yeah - right.

Just like you, Ive eliminated the camshaft walk & dizzy gear & shaft before I sent my box off.
Im running a 3-piece Comp Cams timing cover. Got to thinking, maybe it could be flexing.
Drove a piece of soft wood between water pump & cover to eliminate possibility of cover flexing and it still retarded about 6*.
Thats when I finally pulled the boxs and sent them off.
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Old 09-19-2011, 09:19 PM   #24
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Default Re: Timing retarding with locked out dist.

Quote:
Originally Posted by BigDave65 View Post
If you have a crank trigger, make sure the wheel is turned the right direction. It will cause the timing to retard a bit.
Not running a crank trigger. That may be my problem, I may need one.
Is it possible for the cam to twist that much??
It is a solid roller.
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Old 09-23-2011, 11:04 PM   #25
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Default Re: Timing retarding with locked out dist.

i put a new pickup in the distributor tonight and that made no difference. Wishful thinking! I guess the next step is to pull the timing cover and see what's going on in there.
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Old 09-23-2011, 11:48 PM   #26
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Default Re: Timing retarding with locked out dist.

DANG!!!! Please let us know what you all find...wow...keep diggin...that might be why some people run 42 degrees on a BBC...might be really only 33 or so at max rpm...
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Old 09-24-2011, 12:43 AM   #27
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Default Re: Timing retarding with locked out dist.

had same problem when using an advance timing gun and hooked up to alternator......use a secondary battery and an elcheapo gun and vawalla, no more mysterious timing creep!
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Old 09-24-2011, 07:56 AM   #28
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Default Re: Timing retarding with locked out dist.

Has all the wires and connections in the ignition circuit been checked?
MSD prefer that the leads go directly to the battery.

What kind of timing light are you guys using ... standard or adjustable ?
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Old 09-24-2011, 12:27 PM   #29
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Default Re: Timing retarding with locked out dist.

Quote:
Originally Posted by Looey View Post
Make sure the violet/green magnetic pick up wires are not reversed.

seen this twice and didnt figure it out until switching the wires and checking again 2nd time took just as long bc i refused to believe it could happen again!(2 diff cars) and it makes perfect sense that adv.and retard change when reversed.im not saying this is the same as yours but may be worth a try?
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Old 09-24-2011, 03:24 PM   #30
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Default Re: Timing retarding with locked out dist.

I'm using the cheapy red non-adjustable timing light, two different ones. When I tried the 7AL-2 I tried the purple/green wires both ways and when they were reversed it didn't even want to start. Nothing else going on today, I guess I'll go tear into it.
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