RB20 idle issue

[dizzywithsunstroke]

i have some idle issues with my rb20det in my 95 240sx. after i have driven it for about 5 mins or so and it get nice and warmed up, when i stop and it is idling, the rpms will drop momentarily and immediately go back to normal. it does this over and over again, one time right after another. i dont know the rpms exactly because my tach isn't calibrated yet. i unplugged some sensors while it was doing this just to try to diagnose, nothing happened until i unplugged my throttle position sensor. when the tps was unplugged, it idled normally. and ideas whats wrong? is my tps bad?

[dtowngoalie]

Is your BOV recirculated back to the intake?

[dizzywithsunstroke]

yes it is. stock bov setup.

[dtowngoalie]

worth a try .

[PorkChopExpress]

mine does the same thing. its gotta be a gunked up aac valve, possibly a small vac leak.

[dizzywithsunstroke]

completely cleaned my aac valve about a month ago.

[dizzywithsunstroke]

ill check for leaks.

[dtowngoalie]

Any ecu codes, like coolant temp? That could do it.

[squbafreak15]

i had the same prob on my ka(i know its a dif engine but its still nissan) and it was the tps sensor i replaced it and it did the same thing after like 30-1hr of driving it just fixed its self so i asume it was the tps and it toook the ecu some time to realize the new part or something

[sean8564]

try the TPS

[RussianKid]

i have a similar problem. but its my alt. going bad, it wont give out enough juice under 1300rpm with loads on. get it tested with the battery. hope that helps