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12-1 crank trigger 4x cam sensor

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Old May 28, 2022 | 02:28 PM
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Default 12-1 crank trigger 4x cam sensor
Holley HP ECU
12-1 crank trigger
4x cam
Won't run with cam sensor on.
Runs fine in bank to bank with cam sensor listed as none.
According to Holley tech, the firing order needs to be changed or swap out cam gear to 1x.
Anyone familiar with this application?
Thanks
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Old May 28, 2022 | 02:51 PM
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Looks like the 12-1 crank trigger and 4x cam sensor don't get along. Put in the 1x sprocket. Done.
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Old May 28, 2022 | 03:15 PM
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Originally Posted by G Atsma
Looks like the 12-1 crank trigger and 4x cam sensor don't get along. Put in the 1x sprocket. Done.
Are you familiar with using the 12-1 crank trigger?
Do you know for certain that the 1x is the fix ?
Thanks
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Old May 28, 2022 | 04:02 PM
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OK, what was the 12-1 crank trigger originally meant to operate with?
I DO know the 4x cam sprocket is engineered to operate with the 58x LS-type operating system, which normally works with the 58x reluctor and its attendant crank sensor
Is it possible you have a parts mis-match?
If Holley thinks the 1x cam sprocket will fix it, why not use it?
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Old May 29, 2022 | 06:47 PM
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Originally Posted by Firehawk441
Holley HP ECU
12-1 crank trigger
4x cam
Won't run with cam sensor on.
Runs fine in bank to bank with cam sensor listed as none.
According to Holley tech, the firing order needs to be changed or swap out cam gear to 1x.
Anyone familiar with this application?
Thanks
Yes the firing order needs to be changed to have it work correctly. It has to be done on the 1x cam gear as well with the 12-1 trigger wheel.. I have that. I dont know what the firing order needs to be with the 4x cam gear for 12-1 trigger wheel. I used digital falling for both cam and crank.
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Old May 29, 2022 | 07:09 PM
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Originally Posted by lazaris
Yes the firing order needs to be changed to have it work correctly. It has to be done on the 1x cam gear as well with the 12-1 trigger wheel.. I have that. I dont know what the firing order needs to be with the 4x cam gear for 12-1 trigger wheel. I used digital falling for both cam and crank.
Thank you.
That's what I needed to know.
I have it set at digital falling also.
What firing order did you use with the 1x gear?
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Old May 31, 2022 | 08:35 PM
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Originally Posted by firehawk441
thank you.
That's what i needed to know.
I have it set at digital falling also.
What firing order did you use with the 1x gear?
​​​​​​
6-5-4-3-1-8-7-2

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Old Jun 1, 2022 | 08:15 AM
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Originally Posted by lazaris
6-5-4-3-1-8-7-2
I went through process of elimination Monday.
Engine ran with ….
65431872.
Looks like both the 1x and 4x share the same order using a 12-1 crank.

Thanks for your assistance.

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Old Jun 1, 2022 | 08:29 AM
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Originally Posted by Firehawk441
I went through process of elimination Monday.
Engine ran with ….
65431872.
Looks like both the 1x and 4x share the same order using a 12-1 crank.

Thanks for your assistance.
Thats great ! My pleasure.
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