Yet another MSD crank trigger wiring question

Robin Lawrence · 02-12-2024, 01:44 PM

There are a few possibilities here.

I am not a fan of the 2 wire magnetic crank sensor when triggering the Holley EFI.
I assume that you are running the timing through the Holley HP ECU.

I prefer the Holley 554-118 Hall Effect Sensor. It uses the same 4X Wheel and Bracket that you already have from MSD.

In the ignition configuration I would look at the settings for the crank sensor and the output to trigger the MSD box. The default signal output is 1.5ms. I have seen boxes that wanted more dwell time for the MSD box to trigger properly. Try 5ms and then 9ms if the 5 doesn't work.
Be sure that the crank sensor if setup to magnetic with the 2 wire MSD sensor and not digital.

Does this engine use a Cam sensor?

Robin

02-12-2024, 01:44 PM	#3
Robin Lawrence Sponsor Join Date: Jan 2002 Location: Galesburg IL. Posts: 176 Likes: 249 Liked 711 Times in 120 Posts	Re: Yet another MSD crank trigger wiring question There are a few possibilities here. I am not a fan of the 2 wire magnetic crank sensor when triggering the Holley EFI. I assume that you are running the timing through the Holley HP ECU. I prefer the Holley 554-118 Hall Effect Sensor. It uses the same 4X Wheel and Bracket that you already have from MSD. In the ignition configuration I would look at the settings for the crank sensor and the output to trigger the MSD box. The default signal output is 1.5ms. I have seen boxes that wanted more dwell time for the MSD box to trigger properly. Try 5ms and then 9ms if the 5 doesn't work. Be sure that the crank sensor if setup to magnetic with the 2 wire MSD sensor and not digital. Does this engine use a Cam sensor? Robin __________________ STK 308 SS 3088