is my ECU bad?

sgt.stinkfist · 09-24-2011, 01:08 AM

i think i found that my problem was due to an early second stage decel fuel cut. i tried different ecus, with the same problem, then i tried an un-modded TB and the issue went away. it seems that the TPS, dash pot and both thottle stop settings combined to give the ECU improper inputs making it think i was tipping back into the throttle after a decel event causing it to cut front rotor fuel. the fuel cut issie is gone, but now i have a rediculously low idle speed. i, with the new throttle body am idling around 500 rpm, with the idle speed screw turned all the way out...im suspecting a vac leak that im gonna chase down tomorrow

09-24-2011, 01:08 AM	#3
sgt.stinkfist The Newbie Join Date: Jun 2011 Posts: 16 Rep Power: 0	i think i found that my problem was due to an early second stage decel fuel cut. i tried different ecus, with the same problem, then i tried an un-modded TB and the issue went away. it seems that the TPS, dash pot and both thottle stop settings combined to give the ECU improper inputs making it think i was tipping back into the throttle after a decel event causing it to cut front rotor fuel. the fuel cut issie is gone, but now i have a rediculously low idle speed. i, with the new throttle body am idling around 500 rpm, with the idle speed screw turned all the way out...im suspecting a vac leak that im gonna chase down tomorrow __________________ 82 GS- GSL rearend, ported S4 13b, MSD 6AL, walbro 255, 460/550cc injectors, 2" dual exhaust, 3 row aluminum radiator w/ taurus E-fan 85 20v ST AE86 - sold to fund the 82 86 RX-7 GXL - donating parts to the 82 everything else - scrapped to fund the 82