Old post for sure....
Don't use Seafoam! I won't be bashful to say this.
Why haven't yu searched elswhere on TS regarding
Seafoam???
Hope this helps. If your brother is truly a Tech...he should be in agreeance with me!!!!!!!!!!!!!
The only additive I would use to remove any carbon and clean the fuel system is
Techron
Premium fuel is not really any advantage in this 1mz-FE engine.
Hope this only response will help yu.
LT