Ryan Armstrong

iTrader: (8)

so i did a motor swap and i dont have any spark. the car cranks over but no spark at all. all grounds are connected. i also have power at the coil packs. my cam and crank sensors are connected. i'm thinking it has to be the grounds to the back of the heads but they look fine. could it be anything else im forgetting?

Thanks

MontecarloDrag

iTrader: (3)

One reason for no spark when cranking is a damaged crank position sensor.
The coil packs have one black wire, which is ground. They also have a +12V wire, I think it is pink. Check they have 12V always.

I had a swapped Malibu with that same problem. It was a damaged crank sensor wire, because it goes very near where the engine mounts are located, I think it was crushed when installing the motor.

Fixed the wires and it started right away

Old Geezer

iTrader: (3)

No power to the system when the key is in the start position??

Ryan Armstrong

iTrader: (8)

ok ill check that. no with the key on i have power at the coils, yet i have no spark

Old Geezer

iTrader: (3)

is there power there in the START position?????
Do you have a tach signal???

Ryan Armstrong

iTrader: (8)

ya with the key in the start position i have 12v at the coils. not sure about the tach signal??

crainholio

iTrader: (2)

Does your tach needle move during cranking? Should move off the seat while the starter is spinning.

Ryan Armstrong

iTrader: (8)

so i figured it out. it was a messed up wire to the crank sensor. it fired right up after i fixed that.


thanks for the help!!