Hello,

I have an '86 Monte LS with 4.3. when trying to accelerate it loses power. I have done a complete tune up, new exhaust, and TPS. After the TPS is ran pretty strong but seems to lose acceleration and has power surges. Just wanted ideas on what it might be. It is throwing a o2 sensor code which I haven't changed yet.

Thanks

What is the O2 sensor code? Just because there is a code about the O2 sensor, doesn't mean the sensor itself is bad.