Spark Plugs RED HOT!

[Streettuner]

i checked the gapping of the old plugs and there off by .10, is that a big diff and can cause any trouble?

[Streettuner]

its not stumbling, it just dont pull hard as it should.

[40th GT]

i checked the gapping of the old plugs and there off by .10, is that a big diff and can cause any trouble?

That's pretty significant. Try a .054". And stay FAR away from platinum plugs. Assuming you are NA, go with copper. Just be advised that copper plugs need to changed about every 10-15k miles.

As for the lagging, it might just be a bad batch of gas.