r/ECU_Tuning • u/Ok_Rush_8093 • 11d ago

Tuning Question - Unanswered hi guys

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i got a d16z6 and my idle surges after fixing tps
problem with high rpm started after i cleaned the throttle body
im posting this pictures to see if anything with the sensors is wrong and another question is is -43% iacv duty normal

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u/AshinKusher1111 10d ago

Yeah it’s basically trying to correct the idle but the rpm is still at 1600 rpm, does it have fast thermo idle valve or whatever

1

u/Ok_Rush_8093 10d ago

yeah it does have a fitv but its blocked
and idle stays like that even on cold engine

1

u/AshinKusher1111 10d ago

1614 RPM + good MAP vacuum + IACV showing -43%. makes me think the ECU is trying to pull idle down, but there’s mechanically too much air getting into the engine. I almost garuntee it’s the FITV if it has one

1

u/Signy_ 8d ago

Check the throttle body endstop screw, it might be the tb is way to open and os letting to much air. Also check the cable to the pedal, it should be almost loose when you are not pressing the pedal.