tach doesn't work

[drayrunner]

Okey, my second problem my tach also doesn't work, anybody know how to check that. thanks

[bszopi]

Stock? Aftermarket? Has it ever worked?

Need a little more info...

[drayrunner]

factory tach

The car is a 02 malibu 3100 has a factory tach , in a early post i said i changed the timing chain now the tach doesn't work and when i had it running i notice the tach, but i think it needs a case learn which i can do, i though maybe the tach not working has something to do with not running. i need some ideas i already changed the crank sensor behind the damper. i get code 336 if that helps. thanks

[bszopi]

P0336 - Crankshaft Position (CKP) Sensor A Performance

Sounds like you don't have all the wires reconnected to the ICM.