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08-01-2013, 10:08 AM
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CC Member
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Join Date: Sep 2012
Cobra Make, Engine:
Posts: 61
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Not Ranked
MSD ignition problem
I have a MSD 6 AL ignition system,2 blaster coil and MSD distributor.Im having intermittent spark problems.I drive the car for 10-15 minutes and it quits.I wait 5 minutes and vroom off I go for another 10 or 15 minutes and the same thing happens.All opinions suggestions and advice would be greatly appreciated.
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08-01-2013, 11:04 AM
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CC Member
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Join Date: Nov 2009
Location: Stuttgart,
GE
Cobra Make, Engine: ERA #539/427 Holman Moody #7HM20 from 1967
Posts: 92
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Not Ranked
Marc not trying to be too short, but Google MSD and look for their trouble shoot section and give the tech reps a call. May help to have a volt meter to check the simle things first then go to the more comlex. Always check for "great" grounds.
R/
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08-01-2013, 11:58 AM
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CC Member
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Join Date: Dec 2004
Location: Yorba Linda,
CA
Cobra Make, Engine: FFR, V8, Manual Trans, Htr, Wipers, Radio Delete
Posts: 327
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Not Ranked
It's also possible that the pickup coil in the distributor is dropping out when it gets hot. Just another thing to check.
__________________
FFR - V8, Manual Trans, PS, Inop Wipers, No Radio, Gas Mileage so-so
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08-01-2013, 07:49 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
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08-01-2013, 07:51 PM
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CC Member
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Join Date: May 2001
Location: California,
Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
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Not Ranked
__________________
Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way
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08-02-2013, 06:27 AM
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CC Member
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Join Date: Jul 2009
Location: Empire Bay,
NSW
Cobra Make, Engine: DRB 302 Ford HO Block
Posts: 380
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Not Ranked
Hi Marc,
If your coil is mounted on the engine or close to a heat source I would suspect the coil has been damaged by heat. I doubt it would be an intermitant earth as this probably wouldn't improve with cooling of the components.
Good luck, finding the problem but I strongly suggest changing the coil.
cheers
Legless
__________________
Legless
If its not blown it sucks!
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08-02-2013, 06:54 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,404
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Not Ranked
Do a resistance check of the coil. Check the MSD website for directions and specs. Any oil residue coming from the coil body? What position is the coil mounted in? Letting the car sit in the driveway and run or driving it will produce the problem? I assume you have checked all the connections and wire crimps. If you can reproduce the problem in the driveway, test the coil again (above) when the engine dies. You will need to do the same with the box, test again when engine is dead. You might also consider checking the ignition switch (if you tap power to the MSD's small red wire there. Is the small red wire still "hot" when the key is on and the car has stalled? Could be a internal issue with the ignition switch.
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
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08-02-2013, 10:18 AM
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CC Member
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Join Date: Jun 2011
Cobra Make, Engine: Superformance 427SC/Roush 427IR
Posts: 58
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Not Ranked
Check your coil. I've had 2 Blasters fail on me this year, and mine is located far from any heat source. Roush told me they have a number of them that have failed and correctly steered me in that direction. New coil, and voila, runs perfect both times.
I also had a problem with the magnetic pickup in the distributor and had to change that out last year.
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08-02-2013, 10:52 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,404
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Not Ranked
FYI: Many of the reported problems people have with MSD units are related to power surges, high resistance because of poor or corroded wire connectors, etc. Always good to check all these items from time to time.
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
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08-02-2013, 11:22 AM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,519
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Not Ranked
Jeezzz - MSD seems to have become our own Lucas Prince of Darkness.  |
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