Rb20det noticing some flat spots in rev range

[SeanR32GtSt]

So occasionally when going through the gears at almost full throttle I will notice a little flat spot in the rev range that comes and goes. I’ve replaced the coil pack loom and spark plugs. Last should be the packs themselves. What’s a good option? Splitfire or yellow jackets or something else?

[admS15]

Splitfire or OEM Nissan.

[GTSBoy]

Also consider fuel pump might be going soft, AFM might be unhappy in some way (dirty, whatever), injector(s) might be a little sticky.  All of these things can be a bit intermittent too, like coils.

[SeanR32GtSt]

1 hour ago, GTSBoy said:

Also consider fuel pump might be going soft, AFM might be unhappy in some way (dirty, whatever), injector(s) might be a little sticky.  All of these things can be a bit intermittent too, like coils.

I also have changed the fuel filter recently as well. I’ll start with coils next and if not that then I’ll look at a slight fuel pump upgrade.