Tried searching but my issue seems to go way past the basic solutions.

Right now im getting A P1705/P1710 codes even though i replaced the neutral safety switch and P1399 random misfires on all cylinders. Plus the car has a really bad idle/running rough under 2000 RPM.

So far i have cleaned the IACV, switched the MAP with a know good, checked EGR and cleaned the passage ways at the intake manifold, checked/adjusted valve clearance seemed to be within spec, Seafoam through the intake and gas and have even sent out the computer to get checked out and was told its fine.

What else can i do to troubleshoot this problem?

 

Pull ignition coil wires one-by-one to check for bad ignition coils. I had two suddenly fail at once....

 

Right on the money, found a bad one, even though all 6 were replaced twice in the last three years. Damn Oreilly parts but under life time warranty lol.

 

On my 01 CL-S, since it was two of the factory coils that failed, for once I avoided oem Honda parts and went with 6 new Airtex from Rockauto which are still fine 10k later.