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Cams finally installed, and the car won't crank

Posted: Sun Mar 12, 2017 8:59 am
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?

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

Posted: Sun Mar 12, 2017 9:52 am
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-

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

Posted: Sun Mar 12, 2017 2:50 pm
by BIG_GREEK
rediculous question, but....is the engine free? (Turn it by breaker bar/ratchet)

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

Posted: Sun Mar 12, 2017 3:59 pm
by S13REMI
It's a u1000 code. Failure to communicate with the ecm

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

Posted: Sun Mar 12, 2017 8:50 pm
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.

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

Posted: Mon Mar 13, 2017 9:28 am
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.

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

Posted: Mon Mar 13, 2017 10:07 am
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.

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

Posted: Mon Mar 13, 2017 11:45 am
by Silversled
Good luck S13REMI !!

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

Posted: Mon Mar 13, 2017 11:23 pm
by Boosthx
Hope you got it figured out. That would drive me insane.

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

Posted: Tue Mar 14, 2017 8:35 am
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?