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msd 6012 cam sensor failure; please help!!!

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Old 10-20-2014 | 09:08 PM
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Default msd 6012 cam sensor failure; please help!!!

im building a c 10 truck with a 5.3 engine with 317 heads, 2216 edelbrock cam, 750 demon carb, long tube headers, 350 trans with 3500 stall, 4.10 gears.
i just started the truck yesterday but i had a hard time getting it to start, backfires thru the carb, and with the pc connected it get a bad cam sensor. i just checked the harness, grounds, the signal to the A B C connectors and everything seem fine, i did use a cam sprocket out of a lq4 with 24x reluxctor to use the 2216 edelbrock cam, could this be my problem of getting the bad cam sensor signal?? thanks for your help
Old 10-21-2014 | 04:22 AM
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Is the 6012 connected straight to the cam sensor or is it connected to the little harness that comes off the sensor that GM made and then to the 6012 controller?
Old 10-21-2014 | 04:57 AM
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EDIT: disregard, I misunderstood what you meant.

Last edited by Horsepwraddict; 10-21-2014 at 07:28 AM.
Old 10-21-2014 | 06:42 AM
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Originally Posted by ZONES89RS
Is the 6012 connected straight to the cam sensor or is it connected to the little harness that comes off the sensor that GM made and then to the 6012 controller?
the 6012 is connected to the little harness because it doesnt fit directlyto the cam sensor
Old 10-21-2014 | 10:56 AM
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All mine have fit in to the cam sensor or the GM harness. If there was no GM harness I would say switch the outside wires.

Are the heads milled?
Old 10-21-2014 | 11:31 AM
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Originally Posted by ZONES89RS
All mine have fit in to the cam sensor or the GM harness. If there was no GM harness I would say switch the outside wires.

Are the heads milled?
I already tried switching the outside wires, and the heads are not milled. I just read that for a engine with 58x reluctor you need to buy a 4x cam gear, could this be my problem?
Old 10-21-2014 | 11:37 AM
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I used a 3 bolt cam gear from a ls1 and think is a 1x cam gear , can someone tell me maybe this could be the problem if cam sensor failure?
Old 10-21-2014 | 01:29 PM
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Your cam gear should look like the one above.

LS1's have a gear with just a bunch of holes in it.
Old 10-21-2014 | 02:06 PM
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I have used the half moon above and the broken up half moon on the 6012. I hope you just didn't use a gen IV or LS2 cam gear. You would be able to swap that and be in business.
Old 10-21-2014 | 02:58 PM
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Originally Posted by ZONES89RS
I have used the half moon above and the broken up half moon on the 6012. I hope you just didn't use a gen IV or LS2 cam gear. You would be able to swap that and be in business.
i think i just did, but already ordered the half moon one, i will try to post some picsof my build later today. thanks everyone for your help!!
Old 10-21-2014 | 07:39 PM
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The 6012 box is supposed to be used with a 58 tooth reluxctor. I think you may need a 6010 box for that 24.
Old 10-21-2014 | 08:07 PM
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If you choose to use the 6010 I believe you have to use the cam sensor in the rear of the block.
Old 10-21-2014 | 08:46 PM
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Damned man I just threw it out there that the 6012 would use the LS2 style cam gear. I reread the first post After reading 5.3 with 317 heads... Should have known to look deeper.

What year engine do you have before you buy any other mismatch parts?
Old 10-21-2014 | 08:56 PM
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Originally Posted by The stunningman
Damned man I just threw it out there that the 6012 would use the LS2 style cam gear. I reread the first post After reading 5.3 with 317 heads... Should have known to look deeper.

What year engine do you have before you buy any other mismatch parts?
The engine is a 2008 it came with 243 heads but i will be using nitrous thats why the 317 heads
Old 10-21-2014 | 09:23 PM
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Originally Posted by The stunningman
Damned man I just threw it out there that the 6012 would use the LS2 style cam gear. I reread the first post After reading 5.3 with 317 heads... Should have known to look deeper.

What year engine do you have before you buy any other mismatch parts?
You always give very good advise brother. That's what is so cool about this site. Hey sometimes anyone can miss something. And on here someone else will pick it up. Hell you, Speedtigger, Zone and a few others have helped many members. and Thank You
Old 10-21-2014 | 09:59 PM
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Originally Posted by slp1300
The engine is a 2008 it came with 243 heads but i will be using nitrous thats why the 317 heads

I would take the 243's and have them milled to bump the compression up and reinstall them. People lower compression for superchargers and turbo's (full time boost). You tune around nitrous. Don't compromise your set-up.

2008 would use the 6012. So your engine had VVT? DOD?
Old 10-21-2014 | 10:02 PM
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Originally Posted by TTur1996
You always give very good advise brother. That's what is so cool about this site. Hey sometimes anyone can miss something. And on here someone else will pick it up. Hell you, Speedtigger, Zone and a few others have helped many members. and Thank You
Thanks for the props. Absolutely, this section has good people in it. Really to many to name.
Old 10-22-2014 | 10:38 PM
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I believe the 6012 requires a 4x cam gear. thats your cam sensor error



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