hey guys, ok i got my z running good but, the only thing is that when i start it it'll start but only for bout a min. then die,if i leave my foot on the gas it'll stay on.it was giving me a code maf,but i sprayed some maf cleaner did not get it again. but still does it,and no codes but 55.my tps is at 4.6v but if i disconnect it it'll stay on but at higher rpms.Its got new oem fuel inj. new o-rings,new iavc,new aac valve,new o2 sensors,my fuel pump is about 3 yrs. old fuel filter also, new fpr.what could cause this? thanks