[ARBIMMER335I]

OK so I have a n55 of course e-series, which includes stage 2 pure, Fbo, inlets and stge2 fuel pump, bms backend flash and jb4. I'm still getting misfires around 6500at only 21psi. what do I need to do And no its not my spark plugs.

[Cory S]

What fuel?? The higher the ethanol content, the harder the fuel mixture takes to ignite. Need a small .018-.022" gap, and the optimum AFR.

[weehe126]

You either need more fuel or more spark. Over on n54tech there are a few threads about adding a boost-a-spark. To run 21psi im guessing you have E30-40. You could be running out of fuel. Also, I would recommend removing the BEF and see how it acts.

[ARBIMMER335I]

I'm running m4 spark plugs gaped at 22. I'm running e50. runs better with Bef for sure.

[loesch]

You'll need port or throttle body injection, more than likely. Read about it over at n54tech.