Ive always used wd40 just because it was light. But yes i agree ive orderd a nissan maf just to rule that out. Ive got my fingers crossed that a nissan maf will magicly fix it. However im highly doubtfull. The maf i have installed is sending corect voltage and the ecu dosent really care what brand sends the signal as long as its meshing with everything else. I replaced one injector witj one of my old good ones tonight. I will get a chance friday night to finish it up and maybe crank it to see idf there was a change. But i cant see 3 new injectores that go bad at the same time. We we will see.