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#1 |
Registered User
Join Date: Apr 2015
Location: Salina, Kansas
Posts: 18
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Need MSD HEI help
I bought a new MSD module with rev limiter for the HEI in my 69 c10. Installed it correctly and ground it to the negative battery terminal. Now the engine will barely run. It sounds like it is running on 1-2 cylinders and won't exceed ~100 rpm, then dies a few seconds later. I thought I had a defective module so I exchanged it for another one, same problem. I thought maybe my stock coil wasn't good, so I bought the overpriced MSD one recommended for the module. Same problem. Put the stock stuff back in, runs just fine. MSD tech was no real help so I figured I'd ask on here if anyone had any idea why I'm having this problem. Thanks for any input.
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#2 | |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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Re: Need MSD HEI help
Quote:
TRACTION CONTROL DETECTION The Extreme Digital HEI Module has a unique Traction Control Detection (TCD) code built into its microprocessor. This technology carefully monitors and examines the signals of the ignition. If the TCD determines that any signal has been modified in any way, the ignition will be put into a low rpm rev limit mode to immediately slow the car. Before this rev limit is imposed, the TCD goes through a list of cycles and checks to qualify that the trigger has been modified. There is no way to bypass or deactivate the TCD circuitry.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#3 |
Registered User
Join Date: Apr 2015
Location: Salina, Kansas
Posts: 18
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Re: Need MSD HEI help
That sounds like it could be it, I'll have to check into it.
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#4 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,269
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Re: Need MSD HEI help
Make sure your running a FULL 12 volts to the Dist. If you have replaced a points type and are using the wire that went to the coil you have a ballast resistor in line and are not getting the voltage you need. Make sure you run a good sized wire to the dist from the fuse block. Find you a keyed on source.
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#5 |
Registered User
Join Date: Apr 2015
Location: Salina, Kansas
Posts: 18
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Re: Need MSD HEI help
Running a new wire from the "ignition unfused" spot in the fuse box to the power terminal on the distributor did the trick! Thanks for the help!
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Tags |
coil, hei, ignition, module, msd |
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