RichardSwinger
OBS Enthusiast
I didn't want to keep cluttering the official 454 thread so I wanted to start this one for anyone looking for or having information on the various readings for sensors and what "correct" might look like.
First question: Is anyone able to see oil pressure or oil temperature with their OBDII scanner apps? I found out there is a way to open up "GM" PIDs on the torque pro app and was able to see some more useful information. I was able to start seeing trans temp (awesome!) But the oil pressure and oil temperature still won't show anything. I'm wondering if something is unplugged (like the random wire by the steering shaft maybe?) or if there just isn't an input to the ECU. I do have an oil pressure gauge on the cluster and it does seem to respond appropriately (about 80psi/maxed out when cold, about 40psi when hot/cruising, about 20psi when hot and idling) but I'm learning that the gauge cluster indications can read a good bit higher than actual when compared to the OBDII scanner (like my RPM which seems to be consistently 300 RPM higher than what the scanner says).
Next question: what would cause me to be stuck in "closed loop" and how do I fix it? I made sure to get everything up to temperature (about 30 minute drive to work) and it never came out of closed loop, scanner says "feedback fault" and my O2 sensor voltages are all over the place. At first it looked like bank 1 sensor 2 was the only one reading low, but after watching them for a bit they all seemed to jump all over the place. I've read about people fabricating "three wire" O2 sensors, is that something I could/would/should do for all 4 sensors?
I appreciate you guys for taking the time to read!
Sent from my Pixel 3a XL using Tapatalk
First question: Is anyone able to see oil pressure or oil temperature with their OBDII scanner apps? I found out there is a way to open up "GM" PIDs on the torque pro app and was able to see some more useful information. I was able to start seeing trans temp (awesome!) But the oil pressure and oil temperature still won't show anything. I'm wondering if something is unplugged (like the random wire by the steering shaft maybe?) or if there just isn't an input to the ECU. I do have an oil pressure gauge on the cluster and it does seem to respond appropriately (about 80psi/maxed out when cold, about 40psi when hot/cruising, about 20psi when hot and idling) but I'm learning that the gauge cluster indications can read a good bit higher than actual when compared to the OBDII scanner (like my RPM which seems to be consistently 300 RPM higher than what the scanner says).
Next question: what would cause me to be stuck in "closed loop" and how do I fix it? I made sure to get everything up to temperature (about 30 minute drive to work) and it never came out of closed loop, scanner says "feedback fault" and my O2 sensor voltages are all over the place. At first it looked like bank 1 sensor 2 was the only one reading low, but after watching them for a bit they all seemed to jump all over the place. I've read about people fabricating "three wire" O2 sensors, is that something I could/would/should do for all 4 sensors?
I appreciate you guys for taking the time to read!
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Sent from my Pixel 3a XL using Tapatalk