p1128 quandry

[robnoxiousauto]

i have a 2000 hyundai accent with a p1128 system too lean under load changed maff sensor as it tested poorly retested maff now pass but car still running lean and firing code so do fuel volume pressure and volatility test all come up good. the install clear fuel line incase of fuel airration no such luck. check all powers and grounds to pcm,tp and maff sensors again nothing wrong check air intake tube for hole again no such luck. change pcm geuss what still runs the same still super lean fuel trim at +25 short term plus 10 long term test o2 sensors both test out good change em any ways still runs lean re@i injectors and flow test again nothing wrong check fuel volume you geussed it still nothing wrong. Yes i did unplug the maff early on and the car ran good but very fat. current ramp injectors cause i am pulling straws ramp out o.k. confirm power supply to injectors w voltage drop.so any help would be greatly appreciated as far as i can tell have totally exhausted all options.
p.s. i do have a five gas anylizer and four channel lab scope (modis) and know how to use both. thanx if you can think of any thing.


Robnoxious auto