Cams finally installed, and the car won't crank

Tech discussions on the L77 6.0L V8.
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S13REMI
Posts: 123
Joined: Sun Oct 11, 2015 11:59 am

Cams finally installed, and the car won't crank

Post by S13REMI »

So I finally got the cam installed, went to start the car and it won't crank. Battery has power, fuses are good, and everything's plugged in. Does any one have any ideas?
2012 CAPRICE 460WHP! NIGHT FURY CAM, LONG TUBES, OTR INTAKE, NEW ERA TUNE, COILOVERS, C6 Z06 WHEELS. (BIGGEST EVER ON A CAPRICE)
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jackleg
Posts: 99
Joined: Wed May 04, 2016 9:25 pm
Location: SW MI

Re: Cams finally installed, and the car won't crank

Post by jackleg »

Park/Neutral? Security system? I remember thinking on mine that the starter cable routing was rediculous. Check the cable junction under the red cover that's next to the master cylinder-
2011 9C1 6.0
RCR "Little Lunati" 219/223 .625/.625 112+0
Kooks headers, hi flow cats, Dynomax Super Turbos
Flex fuel tune
BIG_GREEK
Posts: 174
Joined: Mon Sep 12, 2016 12:18 am
Location: Delmarva

Re: Cams finally installed, and the car won't crank

Post by BIG_GREEK »

rediculous question, but....is the engine free? (Turn it by breaker bar/ratchet)
"God created Police Officers so Fireman could have heroes!" - My late Father

2014 Phatom Black 9C1 (Toy)
2000 VW Jetta TDI (Daily 420k miles)
S13REMI
Posts: 123
Joined: Sun Oct 11, 2015 11:59 am

Re: Cams finally installed, and the car won't crank

Post by S13REMI »

It's a u1000 code. Failure to communicate with the ecm
2012 CAPRICE 460WHP! NIGHT FURY CAM, LONG TUBES, OTR INTAKE, NEW ERA TUNE, COILOVERS, C6 Z06 WHEELS. (BIGGEST EVER ON A CAPRICE)
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jackleg
Posts: 99
Joined: Wed May 04, 2016 9:25 pm
Location: SW MI

Re: Cams finally installed, and the car won't crank

Post by jackleg »

I'm trying to retrace the steps when I did mine for things to recheck. There was a large connector that went into a box just rear of the passenger headlight. There was also a small single wire computer ground connection (that I broke the eyelet off) on the rear of the drivers cylinder head.
2011 9C1 6.0
RCR "Little Lunati" 219/223 .625/.625 112+0
Kooks headers, hi flow cats, Dynomax Super Turbos
Flex fuel tune
Silversled
Posts: 270
Joined: Fri Aug 12, 2016 7:13 am
Location: Tampa, FL

Re: Cams finally installed, and the car won't crank

Post by Silversled »

Bad Ground (forgot one), or
CAN BUS connector Fault (unlugged, crimped, damaged), or
Dead ECM

That's where I'd start if I were facing a "U1000". I'm sure others will chime in with other suggestions based on their experience.

Good luck.
2014 Chevrolet Caprice PPV
2014 Chevrolet Stingray Z51
2016 AMG C63
2015 BMW X5 iDrive 50i
S13REMI
Posts: 123
Joined: Sun Oct 11, 2015 11:59 am

Re: Cams finally installed, and the car won't crank

Post by S13REMI »

My buddy who was helping/ doing most of this is a gm tech and does cam swaps on ppv Tahoes all the time is a little dumb founded about it. Hes confident every thing is hooked up. Im gonna go take another look tonight, hoping a fresh set of eyes will catch something simple (especially since you guys gave me a few tips on where to look) If not ecu's aren't super pricey just wish I could find some one else around me to test it.
2012 CAPRICE 460WHP! NIGHT FURY CAM, LONG TUBES, OTR INTAKE, NEW ERA TUNE, COILOVERS, C6 Z06 WHEELS. (BIGGEST EVER ON A CAPRICE)
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Silversled
Posts: 270
Joined: Fri Aug 12, 2016 7:13 am
Location: Tampa, FL

Re: Cams finally installed, and the car won't crank

Post by Silversled »

Good luck S13REMI !!
2014 Chevrolet Caprice PPV
2014 Chevrolet Stingray Z51
2016 AMG C63
2015 BMW X5 iDrive 50i
Boosthx
Posts: 23
Joined: Wed Jan 25, 2017 8:48 pm

Re: Cams finally installed, and the car won't crank

Post by Boosthx »

Hope you got it figured out. That would drive me insane.
S13REMI
Posts: 123
Joined: Sun Oct 11, 2015 11:59 am

Re: Cams finally installed, and the car won't crank

Post by S13REMI »

It runs!! It was a grounding issue. We ended up just adding one and it worked. We can't find a missing ground which is weird so who knows. So here's a short clip of it running. This is still open loop and it super lumpy. Cars getting tuned Friday!!!!

https://youtu.be/XueGuvDwGbY" onclick="window.open(this.href);return false;

does any one know how to embed the link so the video actually shows up on the page?
2012 CAPRICE 460WHP! NIGHT FURY CAM, LONG TUBES, OTR INTAKE, NEW ERA TUNE, COILOVERS, C6 Z06 WHEELS. (BIGGEST EVER ON A CAPRICE)
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