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g4+ ls1 COP cant lock the ignition timing


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im trying to start for a first time this ls1, witch is 03 US model LQ4 6.0 L ,COP 24x with cam sensor sinc. engine from truck .I am using ls1 triggers 5-10 and i have RPM steady i have crank and cam signal yes no errors. when i lock the ignition timing so i can set the offset . i get one or two flashes on the mark from timing light than as i continue cranking i continuosly have timing flashes but mark desapears! im wondering if anyone have a base start up map that i can try , or posibly give me idea what could cause this. thank you .

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Hi Jozef

I don't have any known issues with the LS configuration.

The coils do have two grounds one is a signal ground the other a power ground both will need to be grounded.

The signal ground can be connected to the ECU sensor ground but the power ground should be to the block.

To dig deeper we will need to get a scope on to the cam sync signal and a second channel on to ignition one output.

When the timing is locked these should not move relative to each other. If they do not move then we are looking at something in the coils.

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i try to coneckt both grounds on coils  to block , than power ground to block and refrence ground to sensor ground and im stil having problem locking the timing , im NOT geting crank cam errors .car wil start after a configure my trigers as multy tooth 24x , 1 cam puls istead ls1 5-10 but still timing is jumping all ower !!  i am goin to scope the cam crank and look for sync problem but im thinking it could be something with coils. also what should i set in ignition setting ? i set it up as constant duty falling. one other think. first i was providing 12v /batt voltage to cam crank hall sensors now i change it to 8v coming from ecu. does this matters???

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Hi Jozef,

According to the information I have the LS1 crank and cam sensors should have a +8V supply.

Can you record a PCLog using PCLink while attempting to set the base-timing. You can then check this and see if the ECU is trying to hold the ignition angle steady.


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