I have a 2005 Jeep Grand Cherokee that was overheated and the engine blew. I bought a 2002 same motor 4.7 liter. I heard the new one start and run prior to install now this one don’t have the egr valve as the old one did so that plug is homeless. And it didn’t have a knock sender located under the intake on the blown motor so I put it there everything else was the same the motor cranks over fine brand new mopar batt fuel pressure is good fuses are good but I’m not getting any spark from the coil pacts the only thing not plugged in is the plug that went to the egr on the other motor. Can anyone help me with this.?

 

Are the coil packs getting power?

 

There’s power going to the fuse box to the relay to the actual coil packs but no spark comes out the other end of the coil packs out of any of them if I put the test light into the plug that goes on the coil pack when I crank the motor the test light lights but does not pulse it stays steady until I release the key from he start positions I checked all the grounds one comes off the firewall then splits into two they go to the two back coil hold down nuts on eighther side. one comes from the firewall to the passenger side bolt on the head. one from the fender to the battery and the driver side block motor mount. I’m at a loss here oh bty my pcm is new and from flowmasters.