It wasn't lambda issue. Both banks are lean. Multicaptive is 12 and more speed you drive more integrators are on + side. While cruising 50+ mph integrators goes way over ten. And just noticed that car feels kinda slow when hitting gas 40+ mph speeds. Starting to think if the fuel pump is weak. Too bad I don't have fuel pressurse meter... New fuel pump is cheap, so not worth to buy pressure meter.
