89 V2500 No TBI O2 sensor?

[chris989]

Hello,

I am no pro but help a few guys here and there. I have an 89 v2500 also. The location of your O2 is too far back. get it closer to the engine and install a 3 wire.

Without a heated o2 you will never get into closed loop and will run in the default table.

If you are going headers, put it in the collector. If you can get i t back in the manifold you might not need a heated sensor.

If you are not in closed loop, nothing will work well.

Chris