I have a MY01 WRX with PPP. The car has always suffered from hesitation under part throttle, which disappears under full throttle. I have searched under hesitation and a recent post suggest that incorrectly gapped plugs may be the answer. I am thinking of replacing the plugs with the Blitz Iridium 77 plugs and have two questions really.

1. Has any one else used the Blitz Plugs and seen any improvements.
2. What gap should they be set at?

 

I had them fitted at my 30K service.
Car drove better thereafter but it could've been a number of things improving response after a big service.
As far a gap settings go, the dealer fitted them so I couldn't comment other than assuming it's the same setting as for OE plugs.

Paul

 

I had them fitted at my 30K service.
Car drove better thereafter but it could've been a number of things improving response after a big service.
As far a gap settings go, the dealer fitted them so I couldn't comment other than assuming it's the same setting as for OE plugs.

Paul