I bought a mini ELM327 bluetooth device and I have been watching the timing advance on my truck.
I have been monitoring it with Torque Lite.
Problem: Torque lite shows the timing anywhere from -13 to -40 all the time. The only time it goes close to 0 degrees is when the truck decelerates for more than a minute.
I attached the ELM327 device to a 2000 Corolla and a 1997 Tahoe and it read timing advance correctly.
My truck is a 1996 GMC K1500 with a 5.7L vortec.
Build date is 10/95.
185,000 miles on original engine with 40+ psi oil pressure and a 180 degree thermostat. No abnormal noises.
I have never had the distributor out but the previous owner may have had it out because it looks like the intake gaskets have been done.
No OBDII codes and the truck runs strong and smooth all the way to readline. The truck shows no signs of a problem.
I'm thinking the Torque app is reading the protocols wrong. If anyone has an early 1996 truck with a 5.7L vortec and the blutooth ELM327/Torque lite app, see if you get the same readings as I do for timing advance.
I'm not going to pay for Torque Pro because I have an Ultragauge coming in either today or tomorrow. I will see if it reads the same as Torque Lite.
I also have a new Delphi knock sensor/coolant temp sensor/195 degree thermostat standing by in case the Ultragauge reads the same as the Torque Lite app.
I'm still trouble shooting but anyone can comment with suggestions.
Edit: I forgot to mention that the truck came with a Hypertech 360202 hand held tuner with the programing installed. I have returned it back to stock settings but I still have the same issue.
It's possible that the hypertech could be the issue.
I have been monitoring it with Torque Lite.
Problem: Torque lite shows the timing anywhere from -13 to -40 all the time. The only time it goes close to 0 degrees is when the truck decelerates for more than a minute.
I attached the ELM327 device to a 2000 Corolla and a 1997 Tahoe and it read timing advance correctly.
My truck is a 1996 GMC K1500 with a 5.7L vortec.
Build date is 10/95.
185,000 miles on original engine with 40+ psi oil pressure and a 180 degree thermostat. No abnormal noises.
I have never had the distributor out but the previous owner may have had it out because it looks like the intake gaskets have been done.
No OBDII codes and the truck runs strong and smooth all the way to readline. The truck shows no signs of a problem.
I'm thinking the Torque app is reading the protocols wrong. If anyone has an early 1996 truck with a 5.7L vortec and the blutooth ELM327/Torque lite app, see if you get the same readings as I do for timing advance.
I'm not going to pay for Torque Pro because I have an Ultragauge coming in either today or tomorrow. I will see if it reads the same as Torque Lite.
I also have a new Delphi knock sensor/coolant temp sensor/195 degree thermostat standing by in case the Ultragauge reads the same as the Torque Lite app.
I'm still trouble shooting but anyone can comment with suggestions.
Edit: I forgot to mention that the truck came with a Hypertech 360202 hand held tuner with the programing installed. I have returned it back to stock settings but I still have the same issue.
It's possible that the hypertech could be the issue.
Last edited: