J Tuck
Member
Hey guys, just test drove it again today and took some log data.
Firstly, I tried removing and reconnecting all ECM connectors in the engine bay. No change.
I also tried removing the ground cable, draining the capacitors for a good 10 minutes with a jumper, then reconnecting the ground cable to the battery. No change.
I have NOT cleaned the throttle body. It looks really good and actuates smoothly and without jumping around when the engine is off.
I don't know if this is the cause, but I came across a discovery today after driving it and looking at my log data...
It seems that the VCT Command DC (Duty Cycle) stays high on some runs as my RPM rises above 2000, but the VCTADV (Actual Advance)(and VCTADV2 for that matter...) drops to 0 way before the command DC comes down. I'm now very concerned that I am dealing with an oil pressure problem... (bank 1 falls out before bank 2)
That said, that doesn't jive with the test I did two days ago. I drove it until it started bucking, pulled over, shut it off, pulled the VCT actuator connectors off, started it back up, and started driving again. As soon as I got back on the road, the bucking continued. Drove it a while like that. Pulled over again to reconnect everything. Faults from disconnecting things went away but was still bucking all the way home.
Any ideas? I'm still grasping at straws trying to figure this out. Why would it continue to surge if low oil pressure is the culprit, even when disconnecting the VCT Solenoids?
Firstly, I tried removing and reconnecting all ECM connectors in the engine bay. No change.
I also tried removing the ground cable, draining the capacitors for a good 10 minutes with a jumper, then reconnecting the ground cable to the battery. No change.
I have NOT cleaned the throttle body. It looks really good and actuates smoothly and without jumping around when the engine is off.
I don't know if this is the cause, but I came across a discovery today after driving it and looking at my log data...
It seems that the VCT Command DC (Duty Cycle) stays high on some runs as my RPM rises above 2000, but the VCTADV (Actual Advance)(and VCTADV2 for that matter...) drops to 0 way before the command DC comes down. I'm now very concerned that I am dealing with an oil pressure problem... (bank 1 falls out before bank 2)
That said, that doesn't jive with the test I did two days ago. I drove it until it started bucking, pulled over, shut it off, pulled the VCT actuator connectors off, started it back up, and started driving again. As soon as I got back on the road, the bucking continued. Drove it a while like that. Pulled over again to reconnect everything. Faults from disconnecting things went away but was still bucking all the way home.
Any ideas? I'm still grasping at straws trying to figure this out. Why would it continue to surge if low oil pressure is the culprit, even when disconnecting the VCT Solenoids?