Vats tuned out...my fuel pump primes 60psi .. injectors pulse I plugged up old injector and checked with test light to verify ..Coils have good 12v good ground and good low reference.. it’s like pcm does not send signal to fire coil. Could it be cam or crank sensor? How would you check? Can you view this through live data on a scan tool? Thanks for any help

 

Are you sure VATS was properly turned off?

 

i am starting to wonder.. It was in another one of my irocs already ls1/cam t56 I put engine in another car with a 4l60e and had my tuner swap some stuff for it to run automatic..maybe something happened there

 

Vats or crank sensor will stop the engine from running. Check your crank sensor connector also

 

ill check that tonight.. I know I have 12 volts to the crank plug ..but I’ll ohm back to pcm plug .. my other car has Ls/t56 I may even swap computers but will it start my auto car? Maybe ground clutch signal pin b34?

 

So I checked cam and crank sensor both have good 12v and good low reference ground.. also checked both sensors while cranking car ..signal wire to low reference ground and I get varying voltages like it’s reading correctly (I’m assuming) On both cam and crank sensors .. pointing me to pcm I believe, maybe vats or something crazy changed when tuner put in stuff for 4l60

 

Check to see if you have 12volts at coils, injectors,etc when engine is cranking. Those key hot wires have to be tied to ignition hot( hot while engine is cranking)

 

I have checked that as well.. I have voltage while engine is cranking.. voltage does drop but I’m thinking that’s because the amp draw of starter

 

If your fuel pressure is good, what about your grounds

 

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Update.. crank position sensor was bad, which was brand new out of the box go figure.. thanks again for the help

 

What brand is that

 

BWD