2006 Nissan ad wagon with qg15 engine, no power x pedal to the floor an going no where an hearing a hard backfiring noise. No codes when scan. Replaced air flow, oxygen sensors, Throttle body, new fuel pump + filter, service injectors an new spark plugs, check back engine timing, cam an crankshaft sensors replaced, check timing by removing the top cover on point. Check back fuel pressure idle at 50psi. Checked for vacumn leaks found none.Same issue. Any help will be appreciated. Thanks.
Did those parts test as bad before you replaced them? Did you install OEM parts? Anything suspicious in live data? Have you checked for a clogged catalytic converter?
Cat was removed. All was foreign used oem parts.
@car-boss Used parts (which may well be 20 years old) can be as bad or even worse than the ones you removed. You might want to perform an analysis of live data for problems. For that matter it would not be a bad idea to do a compression check to verify internal health of the engine.