mr_s
Newbie
Looking for some assistance with a problem I have...
I've got a 1997 K2500 Suburban with a 5.7 Vortec and it won't go into closed loop mode, I have the 'Torque Pro' app on my phone, and a Bluetooth OBDII dongle plugged into the car.
The o2 sensors seem to be sending the correct signals back, voltage jumps around between 0.1v and 0.8v as it should (o2 sensors are brand new)
ECT sender is working fine, the app shows the correct temp. Just to satisfy my own curiousity, I unplugged the other temp sender, just to make sure that they weren't crossed over or anything. As expected, no temp readout on the dash, but the app still read correctly.
The app keeps reading 'Fuel System Status: Open Loop - Insufficient Temperature'. I've run it up to operating temp in my garage (86C / 185F or so) and it just sits there with that message. The check engine light doesn't come on, and there are no stored error codes in the ECM
The truck runs fine, however it doesn't pass the annual emissions/smog test here in the UK, so I'm off the road until I can sort it... Any ideas what I can look at next, as all the usual suspects check out fine? Obviously, being in England, parts are harder to come by than in the States, so I can't just throw parts at it to try stuff (not that I I work like that anyway...)
I've got a 1997 K2500 Suburban with a 5.7 Vortec and it won't go into closed loop mode, I have the 'Torque Pro' app on my phone, and a Bluetooth OBDII dongle plugged into the car.
The o2 sensors seem to be sending the correct signals back, voltage jumps around between 0.1v and 0.8v as it should (o2 sensors are brand new)
ECT sender is working fine, the app shows the correct temp. Just to satisfy my own curiousity, I unplugged the other temp sender, just to make sure that they weren't crossed over or anything. As expected, no temp readout on the dash, but the app still read correctly.
The app keeps reading 'Fuel System Status: Open Loop - Insufficient Temperature'. I've run it up to operating temp in my garage (86C / 185F or so) and it just sits there with that message. The check engine light doesn't come on, and there are no stored error codes in the ECM
The truck runs fine, however it doesn't pass the annual emissions/smog test here in the UK, so I'm off the road until I can sort it... Any ideas what I can look at next, as all the usual suspects check out fine? Obviously, being in England, parts are harder to come by than in the States, so I can't just throw parts at it to try stuff (not that I I work like that anyway...)