Jnino11

Hello everyone! here with my ‘91 c1500 350 sbc tbi. Just wondering if elevation has a huge impact on how the truck will run when changed? I read on a couple forums that it uses the O2 sensors to help with air fuel mixture. I’m not sure I read a lot of different replies. If anyone knows or has an idea let me know! I’m planning on taking the truck up camping and I’m going to climb about 2 thousand and some feet!

AndrewOBS2

Short answer is yes, the truck will run but there will be a noticeable decrease in performance not huge but it wont be the same. Elevation does play a role in how your pcm controls your A/F ratio. Its not a must but I would plug a scanner into the truck and make sure your o2 sensors arnt throwing any codes and preforming as usual along with your maf sensor.