Mike Alexander
Newbie
So I already posted a thread but I realized that I put it up in the exhaust thread and I wanted to make sure everyone sees it. It's not an exhaust issue, per say, but I feel my exhaust may be causing it. I have a '93 k1500 sierra with a 5.7 that I converted to an nv4500 from a 4L60E. I replaced the plugs with factory Delco plugs. 8mm wires and brass cap and rotor. Replaced battery terminals. Cleaned all power and ground connections. New alternator and rebuilt the tbi unit. I also put headman long tube headers on with a 2.5" dual exhaust. I put the O2 sensor in the #3 primary tube close to the head. It seems a bit hesitant in neutral giving a rev or two at the tbi unit. Does anyone know or have any experience with this? I'm not sure if it wants more timing maybe bc of headers and exhaust or if the timing is even correct for that matter. I also thought maybe bc the O2 is only reading one cylinder that somehow that could be it. But it seems late on timing to me. Runs very smooth and even kinda slow though...as if it's late. Thanks for any help!
