5.3 SWAP Wiring Problem

[glock35ipsc]

I'll have this moved this to the LS swap area for future reference.

BTW, when I tried to start mine for the time, I also had fuel but no spark. Turns out the "key on" wire I had chosen to trigger my ignition coil relay had 12v when the key was in the "run" position, but lost power when in the "start" position. Changed the trigger wire to one that had power in both "run" and "start" and it fired right up.

Glad it finally started for ya!

[eagleuh1]

Awesome, glad you got it figured out and was something so simple and cheap to fix. How bout some pictures now.

[Ackattack]

Originally Posted by glock35ipsc

I'll have this moved this to the LS swap area for future reference.

BTW, when I tried to start mine for the time, I also had fuel but no spark. Turns out the "key on" wire I had chosen to trigger my ignition coil relay had 12v when the key was in the "run" position, but lost power when in the "start" position. Changed the trigger wire to one that had power in both "run" and "start" and it fired right up.

Glad it finally started for ya!

I had the exact same thing when I was doing my TPI swap, but occasionally, the engine had enough inertial to spin enough, that when I let off the "start" back to the "run" it would fire up.....that had me stumped for a week!



Glad you got it fired up

[tk-mpl]

I feel your pain, it took me 3 weeks of more then just sundays to get mine going. I rewired and reprogrammed with EFI Live myself. Went to start it and had no injector pulse and no spark. I rechecked every pin on the ECM and traced a lot of the wiring... LONG story short I reflashed it with a different vin and it started right up........ But man, all the hate was gone when the sound of open headers scares the crap out of you.......

Trevor