New engine crank no start
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On The Tree
Joined: Nov 2018
Posts: 166
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New engine crank no start Just installed a built ls3 into my 2009 avalanche.
installed new cam and crank sensors. Running ls3 throttle body.
I’m getting crank no start.
No Ecm codes.
BCM code is U1511-00 Lin Bus 1 lost comms with device
edit: just installed the old crank sensor and same thing. I did verify that all my grounds are one. 2 on the passenger head, 1 on the driver head and 1 near the driver engine mount.
installed new cam and crank sensors. Running ls3 throttle body.
I’m getting crank no start.
No Ecm codes.
BCM code is U1511-00 Lin Bus 1 lost comms with device
edit: just installed the old crank sensor and same thing. I did verify that all my grounds are one. 2 on the passenger head, 1 on the driver head and 1 near the driver engine mount.
Last edited by Carp; Nov 12, 2024 at 08:36 PM.
Can you try a timing light on a spark plug wire and see if you are actually getting spark. You could move it to each wire to make sure you have spark. You would need someone else to crank it (while you have the timing gun) or make a remote start with something. Sometimes I have wrapped the trigger of the timing gun and pointed it so I could see it while I turned car over from driver seat.
Are you getting an RPM signal while cranking?
Was correct reluctor wheel used? It should be a 58x if you are using the 09 stock PCM.
Was the reluctor replaced?
Have you checked all fuses?
Was correct reluctor wheel used? It should be a 58x if you are using the 09 stock PCM.
Was the reluctor replaced?
Have you checked all fuses?
