Hi All,
Here is the story - just reinstalled motor after minor rebuild upon trying to start the car I have no spark! Well when motor was out
had starter wires fall and start arching so I figured may have blown fuse in MSD,it was good.
Then I figure I would check injectors to see if they fire,well both wire w/ignition on are showing power. Then I went and bought a
remanned 7730 - To my surprise I have spark! cool!,not so -
injectors still not firing so i checked inj wires at the ECM they are showing power ? so is alot of other wires along with the system ground wire...
It appears im feeding power back to the ecm but from where?
I unplugged all connectors and still get power through the inj,torque converter lock up and many others.
Now im stuck and sure i blew this new ecm,what wires would you check for power to trace back ? or where to look ? please please help.
They inj. wires should not have power right? they are controlled
by ground correct?
Ohh yeah the dash dispaly (digital) is also acting really weird.

 

Did you hook the grounds up on the back of the heads?

 

Yes I did,
But I think I just found problem I grounded the terminal to the ECM and my dash board display started showing normal so I must have pinched that ground between firewall and motor/tranny during install.
Im not sure thats the prob yet till i get everything wired back up againg from trouble shooting but it seems to be.
Thanks for help.