Hello fellow members,
This is my first post here, however I'm no stranger to forums and their etiquette. I've been searching for weeks so please dont refer me to that. So with that out of the way, allow me to acquaint you with the situation. The truck is a 99.5 f350 xl. Has an intake, exhaust, new factory turbo, bullydog gt (that is currently uninstalled). The issue: while driving the vehicle cut out. No stumble, just shut off like you turned the key off. Then no start. This was a month ago. Since then I have replaced the IPR, fuel filter, CPS, IDM and batteries. Monitoring with forscan, I have been able to verify proper oil pressure (2800 psi) @ 45% duty cycle. Proper VREF voltage of 5v. As well as an rpm signal. I can see a demanded pulse width of 3.5ms, but they do not seem to be firing. As there is no smoke or smell out of the exhaust. A buzz test has been performed 5 times and tested great each time with no codes. Fuel pressure has also been verified as well as the pump operating as well. The inertia kill switch has also been tested. So seemingly at an end I whipped out the volt meter and started getting some interesting readings. While ohming out the harness and injectors starting at the idm plug I found high resistance on injectors 2 &7. So I disconnected the UVCH plugs and retested to confirm the issue is in the valve cover, which it did. However while testing the left bank injector power supply,pin #23, I found resistance between the IDM power supply, pin26, and the injector ground shield,pin 18. So i removed the 42 pin connection and retested between there and the idm plug with the same issue. I have searched high and low through that harness and all the plug connections for shorts or chaffing to no avail. Am I missing something? Is there another direction to take? Any explanation to the resistance between pins that should be infinitely open? At no point through all of this did the truck make the slightest inclination of starting. Please help me revive this old beast.
Btw, the only recurring dtc I have is the P1670
Thank you in advance
This is my first post here, however I'm no stranger to forums and their etiquette. I've been searching for weeks so please dont refer me to that. So with that out of the way, allow me to acquaint you with the situation. The truck is a 99.5 f350 xl. Has an intake, exhaust, new factory turbo, bullydog gt (that is currently uninstalled). The issue: while driving the vehicle cut out. No stumble, just shut off like you turned the key off. Then no start. This was a month ago. Since then I have replaced the IPR, fuel filter, CPS, IDM and batteries. Monitoring with forscan, I have been able to verify proper oil pressure (2800 psi) @ 45% duty cycle. Proper VREF voltage of 5v. As well as an rpm signal. I can see a demanded pulse width of 3.5ms, but they do not seem to be firing. As there is no smoke or smell out of the exhaust. A buzz test has been performed 5 times and tested great each time with no codes. Fuel pressure has also been verified as well as the pump operating as well. The inertia kill switch has also been tested. So seemingly at an end I whipped out the volt meter and started getting some interesting readings. While ohming out the harness and injectors starting at the idm plug I found high resistance on injectors 2 &7. So I disconnected the UVCH plugs and retested to confirm the issue is in the valve cover, which it did. However while testing the left bank injector power supply,pin #23, I found resistance between the IDM power supply, pin26, and the injector ground shield,pin 18. So i removed the 42 pin connection and retested between there and the idm plug with the same issue. I have searched high and low through that harness and all the plug connections for shorts or chaffing to no avail. Am I missing something? Is there another direction to take? Any explanation to the resistance between pins that should be infinitely open? At no point through all of this did the truck make the slightest inclination of starting. Please help me revive this old beast.
Btw, the only recurring dtc I have is the P1670
Thank you in advance
