Thoughts on these spark plugs?

[scapistron]

I'd probably make a quick check for an intake leak and if I didn't find anything my next move would be new MAF sensors.

I doubt it is exhaust related because the fuel trims on each bank are moving together. Same goes for fuel injectors.

If you want to get real hacky before buying parts a scrap of plywood and some electrical tape is an effective block off plate and would allow you to test run on only one MAF.

 

[M32H32IS]

New plugs cured the issues. No more misfires and acceleration is fine.

Averaging about 20mpg on the highway so fuel mileage isn’t a concern.

Now I’ve got a P0430 code that won’t go away

 

[djkaosone]

That's when it has been running and comes to a stop. When I'm driving the stay +/-10% for the most part

Those numbers are extremely high. You should probably smoke test your system and remediate any leaks. I found out that my entire intake manifold was leaking even with new gaskets. I didn't feel like buying a new or used intake manifold, so I simply grind the metal spacers down evenly for all of them, and it's been holding up for a few years without any more leaks.

Cheapest Smoke Tester, I found. And get any inflatable bladder for the smoke machine.

 

[Rebar 911]

Those numbers are extremely high. You should probably smoke test your system and remediate any leaks. I found out that my entire intake manifold was leaking even with new gaskets. I didn't feel like buying a new or used intake manifold, so I simply grind the metal spacers down evenly for all of them, and it's been holding up for a few years without any more leaks.

Cheapest Smoke Tester, I found. And get any inflatable bladder for the smoke machine.

This is great. Thank you. Where are you connecting the smoke tester on the vehicle?

 

[djkaosone]

I smoked it by connecting a smoke air bladder into the throttle body.