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Help!! Distributor doesnt work.What Distributor is this?

Old Aug 3, 2006 | 10:27 AM
  #1  
chickenhawk's Avatar
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From: Plainfield, IL
Car: 86 Monte SS
Engine: LS2
Transmission: 4L65E
Help!! Distributor doesnt work.What Distributor is this?

I was sold this distributor and am having a difficult time getting it to work. When trying to set the static timing it surges and when the esc is reconnected it doesnt go to the commanded timing. I swapped the module to my stock distributor and this Accel module clearly works in my distributor, the pick-up coil measures good (by GM standards at least......770 ohm)and I have a good pulse from the reluctor\pick-up coil but they just dont work for my application together. I also put my module in this distributor, switched the leads from the pick-up coil, and still no dice.

My first guess was that the stock distributor has a shield around the reluctor\coil-magnet assy and with this one, unshielded and in the open, it may not fair well for my application. Another theory, per a search on this board, is that its a phasing issue. If thats the case, I would rather not have to advance the static timming to make it work and just stick with the stock distributor as its a known quantity.

So I may be able to get some support, does anybody recognize this distributor? I was told its a Mallory 8048204 but have yet to get any response from Mallory after emailing pictures two weeks ago Update: Mallory responded and said its not theirs..They said it looks like a MSD.. Emailed MSD... they say its not theirs.. So any help Identifying so I can get some support, would be appreciated
There is no part number stamped on it and it looks nothing like this part number from the pictures posted on summits web page for this part number. Please disregard the Accel module as i was told, by the person that sold it to me, that he put this on after purchasing it.

I have attached pictures of the distributor

Thanks in advance for looking.

Matt






Last edited by chickenhawk; Aug 4, 2006 at 10:42 PM.
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Old Aug 3, 2006 | 11:25 AM
  #2  
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From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
Don't know if this will help but I've heard that its possible to connect the pickup coil in reverse.IIRC it will trigger strange because its signaling from the front side of the tooth instead of the falling side.Something like that anyway. Just a thought.Try reversing the two internal wires and see if that helps.
Edit: Sorry, I missed that you did try that already.
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Old Aug 3, 2006 | 11:32 PM
  #3  
chickenhawk's Avatar
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From: Plainfield, IL
Car: 86 Monte SS
Engine: LS2
Transmission: 4L65E
No problem, thanks for replying..

The main item was to identify what distributor this is so i can get some support... Just got back word from Mallory.. They say its a MSD.. I dont think so but I emailed MSD today and now wait for a reply.. If there is anyone with an MSD small cap distributor that would like to weigh in on this thought I would appreciate it as the images I have seen dont match up, although the machining closely resembles an MSD, there are subtle differences. Update: I got a reply from MSD and said this is not theirs as well so i have no clue who makes it If anyone regognizes it I would appreciate the help.
In this post I have attached examples of the MSD distributors that closely match, regarding the machining, images of the one I have posted above. As I said before, there are subtle differences ( obviously, the one example i posted, is a mechanical advance MSD dist. but the point was to show similarities in the machining) so any firsthand knowledge would be appreciated.

Regards,

Matt




Last edited by chickenhawk; Aug 4, 2006 at 10:34 PM.
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Old Aug 8, 2006 | 01:10 AM
  #4  
chickenhawk's Avatar
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From: Plainfield, IL
Car: 86 Monte SS
Engine: LS2
Transmission: 4L65E
The quest continues ..Has anyone a clue who makes this? ( refer to first Images in this thread) If I cant get any support its going in the trash.....Hoping someone has seen this distributor as it looks close to an MSD ( MSD said they dont make it ) And looks nothing like the Mallory. ( emailed pics to Mallory as well.....they say not theirs either)

Anybody? Bueller? Bueller?

Thanks for looking..

Regards,

Matt
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Old Aug 8, 2006 | 06:58 AM
  #5  
mk10842766's Avatar
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Could it be a PROCOMP???
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Old Aug 8, 2006 | 09:02 AM
  #6  
chickenhawk's Avatar
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From: Plainfield, IL
Car: 86 Monte SS
Engine: LS2
Transmission: 4L65E
Hmmmm...Never heard of that.. I did a search though and it looks similiar ( model 10001 ) Thanks I will give it a try and let you know.
Matt
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Old Aug 8, 2006 | 10:17 AM
  #7  
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From: Philly, PA
Clearly it's aftermarket of some kind..... I wonder if the cap/rotor might not be specific to whatever that distributor is. Sometimes aftermarket ones require the use of a special proprietary cap/rotor. Bolt on stock pieces and things might not line up right, if they can bolt on at all.

Given how badly it runs I doubt you could check phasing on a running engine with it. However, you can make careful observations of the position of the pickup teeth, rotor orientation and the location of the cap posts between this distributor and your old stock one. They should be identical if it uses a stock cap/rotor.

Line up a pickup tooth with the pickup sender, check the exact direction the rotor is pointing in that position and then see how it lines up with the post in the cap. Do it the exact same way on both new and original distributors. Beleive me, if it's off enough to cause problems (10-15*) you will be able to see differences with your eye. Just be careful, methodical and recheck yourself 20 times. If it's way off you'll see it.

Also, make sure the rotor is sitting at a height such that the "button" on the inside of the cap from the coil wire can contact it and that the tip of the rotor is at the right height to line up with the conductors under the posts inside the cap.

I've sometimes found distributor problems by just using my eyes, my branins and some methodical "A vs. B" comparisons.

Last edited by Damon; Aug 8, 2006 at 10:24 AM.
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Old Aug 8, 2006 | 12:04 PM
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I think proform still sells a billet type distributor like that as well. Might want to check with them although most of their stuff is throw-off's from another maker...
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