I fitted a set of BKR7E NGK plugs today, i bought a feeler gauge and gapped them to 0.28" as accurately as possible and fitted them in. The ones already in the car were the Bosch super's with double electrodes... after fitting all the coil packs in securely and makingsure all connectors were solid and firm i took it for a test drive... it idles great, sounds great, but i can't help but notice a tiny bit of hessitation around 2.5k rev's....

Are these symptoms of under or over gapping the plugs? or have the new colder plugs simply highlighted a different problem i.e. boost leak? MAF problem etc...

i dont currently have a boost gauge fitted but i have fitted a modshack intake today which i really like! do i need to reset the ecu by disconnecting the battery for it to re-learn the new mods?

All advice welcomed

 

remove and reinstall using di electric grease. if the car is chipped take down the gapping a hair....maybe .26

 

wouldn't taking them down make things worse though?