Z
Gentleman on another forum had an issue and contacted NGK. CR9EIX is what they suggested up to 26 PSI and then they strongly suggest switching to a 10 heat range. Gapped at 0.020.
Some earlier models had issues with the front smart valve closing off at low fuel due to sucking air. Fixes were new tapered springs from dealer, or swapping the front non vented smart valve with one at the rear which is vented.
Some earlier models had issues with the front smart valve closing off at low fuel due to sucking air. Fixes were new tapered springs from dealer, or swapping the front non vented smart valve with one at the rear which is vented.