Force Fed Mopar
05-04-2018, 07:01 PM
Trying to figure out why I have no injector pulse or spark while turning over on my TIII swap. 91 RT SBEC mounted on pass fender, basically built the harness from scratch. Crank sensor seems to work fine in this test? Verified solid 8.9v supply to cam and crank sensor. It gets one injector pulse when the key is turned on (used noid lite to check), but has nothing while spinning over.
Wondering about the 48 ohms on the sensor ground. As far as I can tell from the factory wiring diagrams, the grounds from all the sensors go to Pin 4 of the 60-way, not directly to ground. Which would seem to indicate that the computer turns the ground for them on and off through the signal ground wire on Pin 5, which it does seem to do, but with 48 ohms of resistance. Seems high but not sure. Going to try and check it on my V6 91 Daytona later to see what it shows (runs fine, has factory wiring harness) to verify what I should be seeing.
Any other ideas? Have not checked cam sensor yet. Tried 2 different crank sensors, same results. Everything worked before the swap, drove the donor around the yard before pulling for the swap.
https://www.youtube.com/watch?v=1exq4YWlfQU&t=6s
Wondering about the 48 ohms on the sensor ground. As far as I can tell from the factory wiring diagrams, the grounds from all the sensors go to Pin 4 of the 60-way, not directly to ground. Which would seem to indicate that the computer turns the ground for them on and off through the signal ground wire on Pin 5, which it does seem to do, but with 48 ohms of resistance. Seems high but not sure. Going to try and check it on my V6 91 Daytona later to see what it shows (runs fine, has factory wiring harness) to verify what I should be seeing.
Any other ideas? Have not checked cam sensor yet. Tried 2 different crank sensors, same results. Everything worked before the swap, drove the donor around the yard before pulling for the swap.
https://www.youtube.com/watch?v=1exq4YWlfQU&t=6s