#1  
Old 09-27-2021, 11:01 AM
Mike Fowke Mike Fowke is offline
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Default Ignition breaking up under load

I have a MSD Ready-To-Run and Blaster 2 coil. The RTR is about three years old and has 3-4k miles on it.

The ignition is breaking up under heavy acceleration at the bottom of second. It's fine under normal driving or even heavy acceleration in high gear.

I replaced the coil, plugs, and wires. The cap and rotor look good. So, I think I've isolated the problem to the module.

I recently tack welded part of the exhaust, and I forgot to disconnect the battery. I did not disconnect the distributor. I don't think there was a problem before this. Did I damage the module?

I have an email into MSD tech, but wanted to get an opinion here.

  #2  
Old 09-27-2021, 11:22 AM
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Tom Vaught Tom Vaught is offline
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Are we talking about the RPM plug-in modules or the MSD ignition box in general?

Tom V.

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  #3  
Old 09-27-2021, 11:22 AM
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Tom Vaught Tom Vaught is offline
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Are we talking about the RPM plug-in modules or the MSD ignition box in general?

Tom V.

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  #4  
Old 09-27-2021, 11:33 AM
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steve25 steve25 is offline
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I would jump right over to a points type distributor if you have one to pop in before possibly wasting money on a new module, and jerking around time wise with other trouble shooting steps!

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  #5  
Old 09-27-2021, 11:41 AM
Mike Fowke Mike Fowke is offline
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The RTR has a "built in" module. No ignition box.

I have the original HEI. I thought about trying that, but I'd have to jerry rig the wiring. MSD said they could turn it around in 15 days from receipt.

  #6  
Old 09-27-2021, 01:05 PM
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Scarebird Scarebird is offline
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Quote:
Originally Posted by Mike Fowke View Post
...The cap and rotor look good...
Caps can look brand new and still not function above idle.

  #7  
Old 09-27-2021, 02:47 PM
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JSchmitz JSchmitz is offline
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Sounds like classic fuel delivery problem to me.

  #8  
Old 10-14-2021, 02:45 PM
Mike Fowke Mike Fowke is offline
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MSD just called, and the module is bad. I suspect welding the exhaust w/o disconnecting the distributor did it. Just want to pass it on my expensive life lessons!

Kudos to MSD for the quick turnaround and reasonable repair charges.

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