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Msd distributor issue
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DRR Sportsman
Picture of Novacaine
posted
I pull out my distributor and welded the shaft ,had a little play. I had some rust in there and sprayed some on pb blaster on it. I put it back in and set the timing. Went to test it and the car ran bad. Went from 6.55 to 7.10. From 103 mph to 90. Would the PBS blaster cause this issue.
 
Posts: 217 | Location: North Carolina | Registered: May 07, 2003Reply With QuoteReport This Post
DRR Sportsman
Picture of TD3550
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Welded the shaft??????
 
Posts: 1417 | Location: Under a Truck | Registered: August 23, 2013Reply With QuoteReport This Post
DRR Sportsman
Picture of Novacaine
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No ,tacked the top were the springs used to be. It was locked but had just a little play.
 
Posts: 217 | Location: North Carolina | Registered: May 07, 2003Reply With QuoteReport This Post
DRR Pro
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The reason you have rust forming in the distributor is because it does not have enough ventilation. That little black cap at the top of the distributor cap is the air vent and does not provide enough ventilation especially if you are in a humid climate.

I suggest placing at least two 1/4" dia holes 180* apart in the cap 1-7/8” up from the bottom of the cap between the spark plug towers. I have put in four holes with good results also, but try starting with two.

Try using some Electrical Contact Cleaner spray to clean out the interior to include the reluctor and pickup.

 
Posts: 2653 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR Pro
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One last thought. If you welded it when it was still in the distributor you may have damaged the pick-up. A MSD Billet distributor pick-up should measure 500 - 700 ohms with a meter.
 
Posts: 2653 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR Sportsman
Picture of Novacaine
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It was still in the distributor, I will ohm it out. Thanks
 
Posts: 217 | Location: North Carolina | Registered: May 07, 2003Reply With QuoteReport This Post
DRR Sportsman
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I just check it and it ohms at 738 . I'm assuming since it out of the 500 to 700 it's bad?
 
Posts: 217 | Location: North Carolina | Registered: May 07, 2003Reply With QuoteReport This Post



DRR Pro
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I went out and metered the MSD distributor pick-up in my car. Measured at 516 ohms. My bet is that it’ll possibly measure higher when heated up.

Try replacing the Magnetic Pickup Assembly, MSD 84661. Not hard to do.
 
Posts: 2653 | Location: 53056 | Registered: December 30, 2009Reply With QuoteReport This Post
DRR Sportsman
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I had another msd distributor and it was 518. Then I checked the one in the car and it was cold and it was 738.
 
Posts: 217 | Location: North Carolina | Registered: May 07, 2003Reply With QuoteReport This Post
DRR Trophy
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This might sound silly, but did you re-check the timing after you welded it? I’m assuming you welded it solid to avoid the mechanical advance?
 
Posts: 299 | Location: Midwest  | Registered: January 12, 2015Reply With QuoteReport This Post
DRR Sportsman
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I pulled the distributor out welding it and put it back in and set the timing on 36 degrees.
 
Posts: 217 | Location: North Carolina | Registered: May 07, 2003Reply With QuoteReport This Post
DRR Sportsman
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I've had quite a few issues with MSD pick up's through the years. Seems they all have been completely different problems. I always carry a spare cause every year or two it's going to fail.
 
Posts: 476 | Location: BENTON HARBOR, MI | Registered: August 29, 2007Reply With QuoteReport This Post
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