Author Topic: Msd Blaster Coil Help!!!  (Read 3162 times)

Offline 197

  • Newbie
  • Posts: 99
Msd Blaster Coil Help!!!
« on: November 24, 2008, 08:37:06 PM »
 ??? Dont know where to put this.

I ordered a new MSD Cap, Plug Wires, and a Blaster 2 coil with the resistor for the points. I have the pentronics points conversion installed. I cant get it to run with the MSD Coil on it. It will fire and then die, unless I WOT it, then it will start and run fine.

I have tried it with and without the resistor and it does the same thing. If I swap the old coil back on it starts up perfectly!

Help Anyone???

Heres my Parts on My Ingtion:
http://www.jcwhitney.com/webapp/wcs/stores/servlet/ProductBrowse?tf=Browse&Pr=p_Product.CATENTRY_ID%3A2005114&catalogId=10101&Nty=1&productId=2005114&mediaCode=ZX&Ntx=mode%2Bmatchallpartial&Ntt=pertronix&N=111%2B200729944%2B1973%2B10101&storeId=10101&Ntk=AllTextSearchGroup
http://store.summitracing.com/partdetail.asp?autofilter=1&part=MSD-8214&N=700+0&autoview=sku
http://store.summitracing.com/partdetail.asp?autofilter=1&part=MSD-31379&N=700+0&autoview=sku
http://store.summitracing.com/partdetail.asp?autofilter=1&part=MSD-8202&N=700+0&autoview=sku
http://store.summitracing.com/partdetail.asp?autofilter=1&part=MSD-8437&N=700+0&autoview=sku
'73 C20 454

Offline choptop

  • Senior Member
  • ****
  • Posts: 2476
  • Extended cab fanatic
    • conversiontrucks
Re: Blaster Coil Help!!!
« Reply #1 on: November 24, 2008, 09:24:37 PM »
Im a little lost here. You have the Petronics ignition installed and the coil is for points??? I thought the Petronics got rid of the points. Somethings doesnt sound right. ??? Sounds like the wrong coil.
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline 197

  • Newbie
  • Posts: 99
Re: Blaster Coil Help!!!
« Reply #2 on: November 24, 2008, 09:32:43 PM »
The coil is for either or to my knowledge. Thats why you have to buy the optional resistor. Ive tried it both ways with the same results.
'73 C20 454

Offline choptop

  • Senior Member
  • ****
  • Posts: 2476
  • Extended cab fanatic
    • conversiontrucks
Re: Blaster Coil Help!!!
« Reply #3 on: November 24, 2008, 09:41:00 PM »
Ok, I see it now. I think you may have a faulty coil,(even though its new, it is possible) since you can put the old one on and it runs fine.
76 C10 Choptop,76 C10 Swb
85 C10, 85 K10, 85 K20,86 C10,86 K10 (all extended cabs)
86 C30 extended crewcab

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 17311
Re: Msd Blaster Coil Help!!!
« Reply #4 on: November 25, 2008, 12:51:59 PM »
How do you have the coil wired up? Either explain in detail, draw a schematic or take a picture. If you aren't using points you should be able to run the coil without the resistor. You should have B+ key on and during cranking at the coil. The negative side of the coil should be wired to your trigger device.
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

Offline 197

  • Newbie
  • Posts: 99
Re: Msd Blaster Coil Help!!!
« Reply #5 on: November 25, 2008, 01:20:53 PM »
It's hooked up to the with the factory wires, just like the old coil. I'll try unhooking my tach but I don't think that's causing it.

How do you ohm these coils?
'73 C20 454

Offline joesgarage71

  • Wrench
  • Senior Member
  • ****
  • Posts: 1157
Re: Msd Blaster Coil Help!!!
« Reply #6 on: November 25, 2008, 06:22:23 PM »
 I have had problems with the MSD coils before. Take it back for a new one.
 Steve
78' K-20 355/SM465/twin stick 205 6" on 36's
14 bolt FF/big bearing Dana 44 4.56 gears

92' GMC C-1500 454/4L80E/14 bolt

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 17311
Re: Msd Blaster Coil Help!!!
« Reply #7 on: November 25, 2008, 07:10:15 PM »
Primary resistance Ω across the + and -. Secondary Ω from either side of the coil to the center high terminal. Check resistance Ω to either terminal to the case.
,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

Offline 197

  • Newbie
  • Posts: 99
Re: Msd Blaster Coil Help!!!
« Reply #8 on: November 25, 2008, 08:49:56 PM »
Primairy I get .800ohms
Secondaty I get 5.05ohms

Specs are
.700ohms
4.7ohms
'73 C20 454