New Summit Dizzy.........now tach doesnt work - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Paso76GMCstepper · 09-25-2006, 12:12 AM

Hey everyone I bougt a new dizzy from Summit. The only diff in this one and the stock one is there was a third metal tab in the 3 prong plug. Well I didnt think that was wierd because the new cap and plug had 3 connctions the old one only 2. It runs so much better now. I stabbed it one time and timed it to 10 degrees with the vaccum advance pluged. Absolutly no spark knock. It acts like the tach is going bacwards. It worked perfect with the old dizzy.

Any suggestions guys.

Thanks in advance.

Tony

this is in my 76 K15 350 the part number is

SUM-850001R

09-25-2006, 12:12 AM	#1
Paso76GMCstepper Registered User Join Date: Jan 2004 Location: Paso Robles, CA Posts: 347	New Summit Dizzy.........now tach doesnt work Hey everyone I bougt a new dizzy from Summit. The only diff in this one and the stock one is there was a third metal tab in the 3 prong plug. Well I didnt think that was wierd because the new cap and plug had 3 connctions the old one only 2. It runs so much better now. I stabbed it one time and timed it to 10 degrees with the vaccum advance pluged. Absolutly no spark knock. It acts like the tach is going bacwards. It worked perfect with the old dizzy. Any suggestions guys. Thanks in advance. Tony this is in my 76 K15 350 the part number is SUM-850001R __________________ Tony "Life is a Team Sport" To the memory of the Hendrick Motorsports Plane Crash Victims Last edited by Paso76GMCstepper; 09-25-2006 at 12:14 AM. Reason: spelling errors



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