TorchHypnosis
Active Member
I have a 2007 International 4300 Durastar with a DT466 engine. Recently I can't go any faster than 35-40 MPH on the highway unless I'm going downhill. It feels fine just driving around town. I changed the fuel filter cartridge and put new batteries in which cleared all of these codes:
SID1,2,3,4,and 6, FMI5, Injector cyl (X) current below normal or open circuit
SID254 FMI8 Abnormal frequency pulse width or period
PID168 FMI4 Battery low voltage or short to lower voltage
(note - when I unscrewed the fuel pressure regulator 3-5 Tbsp of what looked like black motor oil trickled out, thought that was odd)
Then I took it out on a test drive for 15 miles on the highway or so and it still would not go faster than 40 on the highway. When I returned there was only one code:
SID27 FMI6 Variable Geometry Turbocharger Actuator #1 Current above normal or grounded circuit.
Felt like a fuel delivery issue to me, so I checked the fuel pressure at the rail. It was staying right at 58 PSI idling and at 2500 RPMs. I know it's supposed to be between 60-70 PSI, but I feel like it should still be able to go freeway speeds with that fuel pressure, but I don't know.
Anyone have any suggestions on what I should try next? I would think if it was a failing sensor it would trip an error code. Does the Turbocharger Actuator #1 need to be functioning for the vehicle to have power going up hill on the highway? I'm trying to figure out what to try next.
Thanks for reading!
SID1,2,3,4,and 6, FMI5, Injector cyl (X) current below normal or open circuit
SID254 FMI8 Abnormal frequency pulse width or period
PID168 FMI4 Battery low voltage or short to lower voltage
(note - when I unscrewed the fuel pressure regulator 3-5 Tbsp of what looked like black motor oil trickled out, thought that was odd)
Then I took it out on a test drive for 15 miles on the highway or so and it still would not go faster than 40 on the highway. When I returned there was only one code:
SID27 FMI6 Variable Geometry Turbocharger Actuator #1 Current above normal or grounded circuit.
Felt like a fuel delivery issue to me, so I checked the fuel pressure at the rail. It was staying right at 58 PSI idling and at 2500 RPMs. I know it's supposed to be between 60-70 PSI, but I feel like it should still be able to go freeway speeds with that fuel pressure, but I don't know.
Anyone have any suggestions on what I should try next? I would think if it was a failing sensor it would trip an error code. Does the Turbocharger Actuator #1 need to be functioning for the vehicle to have power going up hill on the highway? I'm trying to figure out what to try next.
Thanks for reading!
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