Rb25detJay

Hey guys I have an rb25det swapped 240sx which i received recently.

I changed the following things recently

spark plugs from brp6es to brp7es
Coil packs from Yellow jackets to splitfires

I noticed it was backfiring on idle and when I revved it, it seemed to be revving rough or have some sort of lag.

I gapped the brp7es to .28 and the backfiring at idle stopped.

However, the rough idling and the rough shaking still stays, any ideas on what it could be ? Thanks


I'm relatively new to the S chasis and the RB, any and all help would be appreciated.