L99 to LS3 cam swap. now no crank ???? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

leanjay · 04-30-2018, 09:43 AM

previous owner says he did l99 to ls3 cam swap. i purchased the vehicle not running.i'm now doing the diagnosis of the no crank,,no start trouble. can anyone lead me in the right direction of troubleshooting.ex. pcm??vats?? thanks....

Ashen 6.2 · 04-30-2018, 09:49 AM

Might help to have more details. Was the cam swap completed when you bought it? Or did the previous owner give up during the swap?

leanjay · 04-30-2018, 04:31 PM

The cam swap was completed as per seller. I'm concerned about what changes need to be made or should have been made to say the pcm program.or is the no crank no start issue related to standard common electrical issues.shorted wire.low battery power...??? Thanks for reply asen

Bandit63 · 04-30-2018, 08:43 PM

Make sure ground wires are hooked up to right side cylinder head

Pro-tuned · 04-30-2018, 10:18 PM

Priority would be finding out why isn’t it starting then, cam relearn and finally tuning. It could be any number of reasons why it wont start.

WoodBoss · 05-16-2018, 02:44 PM

So it doesn't even turn over? Start at the battery if so.

granatl · 05-29-2018, 01:59 PM

If any of the wiring harnesses are loose (even the bundle into the automatic transmission), you'll get that no crank condition.

ZL1C7 · 05-30-2018, 02:58 AM

Make sure the main engine ground is connected (Short black cable on the body near the ABS module to front of motor) Also make sure you have 12v coming from the battery And as others have said, you will have a single wire ground near or on the back of each head coming from the harness and then a bundle of grounds that bolt to the head near the dipstick. If all your grounds are good and you have 12v and wont even click or turn over let us know. We are assuming it is the same ecu and ignition key that it ran with before

leanjay · 06-10-2018, 10:41 PM

thanks for all of the help and info.but things have gone side ways.the main ground for the ecm was burnt in two. disassembled the ecm plug and found the ground wire melted for 3 inches.checked all grounds.they seemto be all there and in place,does anyone have any ideas?

04-30-2018, 09:43 AM	#1
leanjay leanjay Drives: 2010 camaro ss Join Date: Apr 2018 Location: rivesille wv Posts: 20	L99 to LS3 cam swap. now no crank ???? previous owner says he did l99 to ls3 cam swap. i purchased the vehicle not running.i'm now doing the diagnosis of the no crank,,no start trouble. can anyone lead me in the right direction of troubleshooting.ex. pcm??vats?? thanks....

04-30-2018, 09:49 AM	#2
Ashen 6.2 Drives: 2014 Camaro Z/SS Join Date: May 2014 Location: NW Arkansas Posts: 1,993 View My Garage	Might help to have more details. Was the cam swap completed when you bought it? Or did the previous owner give up during the swap? __________________ 2014 Camaro SS L99, Ashen Grey w/Black Leather - Build thread - http://www.camaro5.com/forums/showthread.php?t=491561 Mods - GPI 416 w/Custom Grind Cam, Ported Heads & Tuned by Ben, Mag Heartbeat, ZL1 Fuel Pump & DSX Aux Pump, NW 103 TB, FIC 1650's, Alky Meth, Circle D 3600 Triple Disc, RPM 5” CAI, Kooks Headers, Solo Cat Back, Viking Coil Overs & all the BMR Goodies in the rear, Zl1 3.23 Diff, DSS Axles, Gulfcoast Driveshaft, Hendrix Offset Diff Bushings, AFE Solid Subframe Bushings, 875HP/843TQ 5FDP

04-30-2018, 08:43 PM	#4
Bandit63 Drives: 2011 Camaro SS Join Date: Feb 2017 Location: Paducah Ky Posts: 257	Make sure ground wires are hooked up to right side cylinder head __________________ MRR M228 Wheels, Circle D 3200 Stall, 3.91 Gear, Texas Speed VVT 3.2 Cam, CHE Rocker Arm Bushings, Texas Speed Headers, No Cats

04-30-2018, 10:18 PM	#5
Pro-tuned Angewendet Ingenieur Drives: 14 Camaro ZL1 Join Date: Apr 2015 Location: USA Posts: 401	Priority would be finding out why isn’t it starting then, cam relearn and finally tuning. It could be any number of reasons why it wont start. __________________ ———— LQ9, Iron Block, Forged internals, 408CI, Jannetty custom cam, TS short block, Whipple, Hardened Jackshaft, PRC 260, 2X3 Dynatech Full Competition, HF Cats, CAI, NW 103, Chee, ID 1300, COPO Breather, MSD, Fore Dual Pump, ultratorque, E85, dual Meth, True Trac, 3:45, 1500hp axle-shafts, DSS CF, BMR, custom Pearl/Candy paint by Jaidah.

05-29-2018, 01:59 PM	#7
granatl Drives: 2SS RS ABM A6 Join Date: Jun 2010 Location: Pahrump, NV Posts: 273	If any of the wiring harnesses are loose (even the bundle into the automatic transmission), you'll get that no crank condition. __________________ Jack Bilger

04-30-2018, 04:31 PM	#3
leanjay leanjay Drives: 2010 camaro ss Join Date: Apr 2018 Location: rivesille wv Posts: 20	The cam swap was completed as per seller. I'm concerned about what changes need to be made or should have been made to say the pcm program.or is the no crank no start issue related to standard common electrical issues.shorted wire.low battery power...??? Thanks for reply asen

05-16-2018, 02:44 PM	#6
WoodBoss "Old School" Drives: 2010 2SS L99 Join Date: Apr 2015 Location: Sherrills Ford, NC Posts: 1,295	So it doesn't even turn over? Start at the battery if so.

05-30-2018, 02:58 AM	#8
ZL1C7 Drives: 2023 SS 1LE 10SPD/2015 SS 427 Man Join Date: Aug 2015 Location: Sacramento Area Posts: 803	Make sure the main engine ground is connected (Short black cable on the body near the ABS module to front of motor) Also make sure you have 12v coming from the battery And as others have said, you will have a single wire ground near or on the back of each head coming from the harness and then a bundle of grounds that bolt to the head near the dipstick. If all your grounds are good and you have 12v and wont even click or turn over let us know. We are assuming it is the same ecu and ignition key that it ran with before __________________

06-10-2018, 10:41 PM	#9
leanjay leanjay Drives: 2010 camaro ss Join Date: Apr 2018 Location: rivesille wv Posts: 20	thanks for all of the help and info.but things have gone side ways.the main ground for the ecm was burnt in two. disassembled the ecm plug and found the ground wire melted for 3 inches.checked all grounds.they seemto be all there and in place,does anyone have any ideas? __________________ 2010 Camaro 2ss 6.2 L L99 automatic. cai and shorty headers. stock gearing and suspension.