Are O2 Spacers required for Max-flo on 986?

[Tigger19]

Thanks so maybe instead of O2 spacers I look at fuel trim values instead? Although not sure why only bank 1 ??

[BYprodriver]

Originally Posted by Tigger19

Thanks so maybe instead of O2 spacers I look at fuel trim values instead? Although not sure why only bank 1 ??

Yes, might be fuel delivery issue, clogged fuel injector etc. Inspect spark plugs.

[Tigger19]

OK. I forgot to add I replaced coil packs and spark plugs at last service only 2000 miles ago. I ran a can of injector cleaner through at that time too (do this every service) but I will look at the plugs condition again as suggested.