No Spark coming to plugs - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 12 (permalink) Old Dec 27th, 15, 11:12 AM Thread Starter
Richard
 
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No Spark coming to plugs

I just replaced my old bulky HEI with the MSD Pro-Billet distributor (p/n 8360) and blaster 2 coil. The engine ran fine with the old HEI but now there is no spark with the new system. I used the same ignition wire for the coil as before. I also made sure to note which plug the rotor was positioned at. There is power going to the coil when the key is turned on. Is it possible that I received a bad coil? Is there a way to check the coil. I have the orange wire to coil negative and the red one (and the ignition key wire) to coil positive. The black wire is to ground.

1969 Chevelle, Malibu, Convertible, Glacier Blue, 350ci #'s matching
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post #2 of 12 (permalink) Old Dec 28th, 15, 12:32 AM
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Re: No Spark coming to plugs

system hickup!

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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post #3 of 12 (permalink) Old Dec 28th, 15, 12:33 AM
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Re: No Spark coming to plugs

Quote:
Originally Posted by Apollo 9 View Post
I just replaced my old bulky HEI with the MSD Pro-Billet distributor (p/n 8360) and blaster 2 coil. The engine ran fine with the old HEI but now there is no spark with the new system. I used the same ignition wire for the coil as before. I also made sure to note which plug the rotor was positioned at. There is power going to the coil when the key is turned on. Is it possible that I received a bad coil? Is there a way to check the coil. I have the orange wire to coil negative and the red one (and the ignition key wire) to coil positive. The black wire is to ground.
===========================================

" I used the same ignition wire for the coil as before "

If its the stock wire from the original points setup thats approx 9v +- so the old elec ign was ok working with less then 12v which was ok.

But the new msd ign & or coil may need a full 12v to run .

Could also be an issue with wire from starter solenoid that sends 12v start only voltage to coil to get motor fired when ign sw is at its full travel position spinning the motor over the start.

Then when the motor starts & ign sw is released thats when the 9v is put thru the old points wire which the msd ign or coil can run on.

Call MSD techline & tell them how you hooked it up and the symptoms & they will get you squared away quicker real time on the phone then going back & forth here with mult post trying to get across to us whats going on.

Scott

SCOTT
1969 CHEVELLE SS396,ORIGINAL #'S MATCH,GOT IN 1978,(In 2001 rblt/bored original 396 .030 to 402)/M20/12BOLT/3:31'S
2002 MAXIMA (DAILY DRIVER/1 owner,GOT 3/2013 w-44k miles)
2009 HD ELECTRAGLIDE CLASSIC ULTRA (GOT 11/14 W-9,700 miles)
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post #4 of 12 (permalink) Old Dec 28th, 15, 7:53 AM
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Eric
 
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Re: No Spark coming to plugs

Have you checked to see if you have voltage at the coil while ignition key is in the start and crank positions?

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
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post #5 of 12 (permalink) Old Dec 29th, 15, 10:09 PM Thread Starter
Richard
 
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Thanks for the replies. I ended up moving the ground wire from the firewall directly to the engine and that solved the problem.
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post #6 of 12 (permalink) Old Dec 29th, 15, 10:36 PM
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Eric
 
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Re: No Spark coming to plugs

What ground wire? Is the ground strap that runs from your engine to the firewall installed?

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
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post #7 of 12 (permalink) Old Dec 30th, 15, 10:35 PM Thread Starter
Richard
 
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Re: No Spark coming to plugs

Yes there was no ground strap from the firewall to the engine. As a result, the firewall was not giving me a proper ground.

1969 Chevelle, Malibu, Convertible, Glacier Blue, 350ci #'s matching
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post #8 of 12 (permalink) Old Dec 30th, 15, 10:50 PM
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Eric
 
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Re: No Spark coming to plugs

My suggestion is to install the missing ground strap as you will have other issues in the future.

Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
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post #9 of 12 (permalink) Old Dec 30th, 15, 11:27 PM
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Re: No Spark coming to plugs

The body ground should be a short wire from the negative battery cable to the fender.

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post #10 of 12 (permalink) Old Dec 30th, 15, 11:49 PM
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Eric
 
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Re: No Spark coming to plugs

There should be 3 braided straps.
https://www.chevelles.com/forums/showthread.php?t=426345


Your just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
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post #11 of 12 (permalink) Old Dec 31st, 15, 8:41 AM
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Re: No Spark coming to plugs

Keep in mind that ground straps that connect to the motor by the valve cover bolts are only for radio noise suppression.

If you think about it, you can't torque down valve cover bolts tight enough for a good ground.

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post #12 of 12 (permalink) Old Dec 31st, 15, 6:48 PM
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Re: No Spark coming to plugs

ALWAYS, large gauge ground wire from negative BATTERY term, directly to engine. Our cars sometimes have an accessory small gauge ground from BATTERY to front sheet metal. then, added ground straps, engine to chassis/body.

As far as the Blaster 2 coils, they are notorious for being defective new, and/or causing ignition module failures for both MSD boxes, and HEI systems. Plug gap with one of those coils, NO MORE THAN .035.
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