2002 frontier 3.3 litre sfi problems

[n3t]

I'm getting an idle miss and it seems like when i'm under the hood reving the tb fast it has a lag. I'm thinking it's due to the miss it's having but i have done this to try to correct it. Changed plugs, wires, fuel filter, ks, distro cap, rotor bug, changed out the injecter insulators when i had the plenum off due to the ks problem. It's still giving me a code for bank 2 catalyst below threshold and i know i have some leaks around my exaust manifold but do you think it could be causing the miss and loss of power on rev? It is sfi so i'm thinking i might have an injector problem since everything is knew on the ignition side except for the timing belt. I have thought about advancing the timing but i wanted to make sure everything else is done first.Ps, the gap on the plugs are around 40 and they are ngk iridiums i didn't set a lower gap because it's not supercharged and i have had this miss for since before the last plug change when i put bosh iridiums in there. I think bosh messed up my cat lol.

[seang]

I don't think the exhaust leak is gonna cause the lag, but maybe I'm wrong. It just doesn't sound right to me.

Are the plugs gapped to stock spec?

[Rev_D21]

Counting the minutes till NissanBossman is banned.

[n3t]

Yeah they are gapped right. I cleaned the maf tonight and it's still doing it. Do you think it may be the egr valve? I'm going to check it next. * sighs *

[seang]

It's worth it to check te EGR, since it's so easy to do.