PCM Diagnostics & Tuning - o2 sensor issue
04-14-2012, 09:48 PM
if your o2 sensors go bad will it cause the car to stall? here the situation i just did a motor mounts and LT install. it a set of hooker headers and borla exhast. the car started to stall after it get to operating temp so i unplug the o2 the car ran fine plug em back in and car stalled. so my question is could that be my problem and could i drive car with no o2 sensor
04-14-2012, 11:17 PM
Problem with doing long tubes is the o2 sensors if you need to have your pcm tuned for the long tubes. Reason being, the o2's with cast manifolds are close to the cylinder heads where exhaust gasses are the hottest so the o2's war up faster. With the LT the o2 senosrs are further away from the hotter gasses and the pcm sees this as the sensors heaters to not working. Dont know if this is the exact problem for you but its just what i know about your situation. IS there any codes?
04-15-2012, 08:48 AM
no its not throw any codes and i drove the car with them not hooked up
04-19-2012, 03:44 PM
i'm having the same problem with my LS1 swap. run like crap with the O2 sensors plugged in, runs much better with out them plugged in. i'm also running LT's & i put brand new AC Delco O2 sensors in it. hopefully i'll get my hands on a scan tool & can see exactly what's going on.
04-19-2012, 06:43 PM
They need to be tuned. The reason they run ok with them unplugged is the computer has no fuel feedback so it constantly runs in open loop. Get them tuned. It will fix it.
04-19-2012, 10:26 PM
found the problem. 2 of the wires on the stand alone harness were crossed going to the drivers side O2 sensor.
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