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2002 Avalanche ls1 swap cranks but no start

This is a discussion on 2002 Avalanche ls1 swap cranks but no start within the LSx Retrofit and Swap forums, part of the LSx Technical Help Section category; I have swapped a ls1 with 243 heads 212/218 .522/.529 114 Lsa cam from comp cams stock bottom end msd ...

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    2002 Avalanche ls1 swap cranks but no start

    I have swapped a ls1 with 243 heads 212/218 .522/.529 114 Lsa cam from comp cams stock bottom end msd coils and a set of longtube headers my phone was tuned by frost... there's 60 psi fuel at the rails used a noid light on the injectors there pulsing it has spark it's throwing no codes all the grounds are good it cranks but will not start

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    Does it try to fire at all? Sounds like maybe no spark. Easy test is to hook a timing light up to any of the wires to see if it flashes.

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    It has spark on all cylinders it's tried to fire twice now in the last week but won't last night I checked the rockers and they were pretty loose so I got em to spec tried to start it up and so e flames came out of the exhaust but it wasn't a loud pop like a backfire

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    2002 Avalanche ls1 swap cranks but no start

    crank and cam sensors hooked up?
    http://www.ls1.com/forums/f7/my-6-liter-build-174257/

    http://www.ls1.com/forums/f8/my-8-8-rear-build-165553/

    6.0L Block - Forged 403 built, breaking it in , Polluter Stg3 Cam, FAST 102mm Intake, NW102 TB, MSD wires, NGK TR6 plugs, Truck Coil Packs, LS3 Fuel Injectors, CC Pacesetter LT Headers, TS&P ORY, QTP e-Cutout, Magnaflow Muffler, 104mm Air Lid & Line Lock, Catch Can, Stage 2 T56, PRO 5.0 Shifter, Tick MC, Monster Stg 4 Clutch, QT SFI BH, MWC DSL, UMI: SFC, PHB, LCA's, LCA Relocation Brackets & TA, Hotchkis Springs (1" Drop), YR1 Snowflake Wheels wrapped in NT555 tires & Custom Fab Ford 8.8 rear w/4.10 Yukon Gears, WSQ Hood, 3"CM Strange Eng Drive Shaft.

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    Everything is hooked up and sensors are good

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