so my car has been running like ass for a week now.. (turbo 2.0tiburon, fully built, turbonetics turbo, intercooled, safc 2=sucks, 255 walbro, mitsu fuel pressure regualtor plus 10:1 vortec fpr, new fuel filter, and basically alot) just givin u some more info.... but last weekend it started popping/sputtering inbetween 5000 and when i shifted at 6000, i kept richenin the apexi inbetween those rpms... didnt work.. this weekend i was driving regularly (kind of) and i went to step on it and my wideband went all hte way lean and my car just went blah... any suggestion? no vacuum leaks that i found either i also swapped my tps but htat didnt work any help is appreciated!

 

Its probably the ECU owning your settings.

Reset the ECU (disconnect the negative terminal, hold the brakes for a bit, then wait 5 mins for the electricity to get out of the system) and you probably won't have a problem, until it happens again.

The S-AFC II just isn't good enough.

Most people here are running dual fuel rails, having an extra set of injectors in the IM to add fuel during boost, and let the ECU handle the fuel out of boost.

 

well i was gunna do that but i moved my battery to the trunk for more space up front and last time i disconnected it it ran like shit until the ecu realzied want was going on and reset itself... also i noticed for some reason when i deleted my CEL codes my car runs bad until i drive it alot but i dont want to drive it while its going way rich and hten leaning out especially in boost... i dont need lean boost because it will only recognize what rpms i go through.. os i have to step on it or it will never learn it...

didnt work.. i guess im just gunna replace my spark plugs again and see how that goes... but my a/f ratio isnt leaning out or running rich, its the same way its always been and no codes came up of course to pin point the problem but now it sputters all the time and its more like popping sounding