Hello All,

I originally got a P0303 cyl 3 misfire code. Replaced that coil pack, then got a P0301 so I replaced ALL coil packs with Denso OEM... Now the P0301 code has returned (a few weeks), so I am going to replace the plugs. I know I should have done at same time but was very time constrained.

Q: Researching, I find there are different plug gaps based on if car is a Calif spec or Fed, for NGK Iridium. This is a Calif car. ULEV What's the difference with the plugs other than the obvious? Will it make a difference if I use the ..044 vs .052 plugs?

Thanks!

2003 Accord 2.4l EX auto Kalif car.

 

An improper gap will cause fuel economy,power and drivability issues. To what extent,varies with the engine/software package.

With that said, are the heat range between the plugs the same? If they are, you can buy either plug and gap them properly(iridium plugs require a wire gapper) to avoid damaging the electrode.

The reality is,you should just order the right plug.