MSD coil bad? Or does it ground through Mount?

rdharper02

like kicking myself in the junk
10 Year Member
May 8, 2006
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O.k., many of you have read my numerous post about my 3g upgrade and my surging problem. Well I installed my MSD coil at the same time. Today I switched to the factory and my warm idle surge damn near went away. (slight surge as before, doesnt read on tach) My question is this: Does the coil mounting bracket serve as a ground for the coil (I painted mine do to rust) or is my MSD bad? When I reinstalled my factory coil I laid it acrossed the master cylinder and the coil bracket (it should see some ground here). :shrug:

Did find out that the GT has a catted H pipe. He!! maybe its factory...dont know.
 
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If there are 4 cats on the H pipe then its probably the stocker.

As far as the coil goes. I would remove some of the paint where the coil mounts to the bracket to make sure that you have a good connection from the coil to the bracket and see if that helps fix it. If that doesn't then I would put the stock coil back on and bolt it all back up the same way as your MSD is set up. If that fixes it then I would vote for bad coil.
 
O.k. I replaced the msd withthe stock coil after noticing that the stocker has a thin metal layer around the mount (bright contact area). I did this bu disconnecting the msd and laying the stock coil across the master cylinder and the mounting bracket. I made sure it would ground. The car ran like it did prior to the install. I removed the coil bracket and cleaned the bolting surfaces (sandpaper to all screw holes). I made sure that all these areas where free of paint. When I remounted the msd she fired and ran like a champ. Even let it run for about 15 minutes. No noticeable surging.

I think your right on the H pipe. It gets removed anyway.