Stupid Idle Problem..

[DefyingGrip19]

never had any probs with my idle before... car is "92 s13/KA24de"
ok so what happens is that when im slowing down for a stop light...i usually leave it out of gear and roll to the light... so as im rolling to the stop light it starts accelerating it self from about 1100-1600 rpms ... (Not Constantly Just whenever it wants) and it even happens sometimes when im stopped... usually happens most when the car is cold... also sometimes itll drop the idle to 200 - 300 rpms almost stalling the car.. but thats only happened like 4 times...so far
i thought vaccum leak.. but anyone had this prob before? plz lmk

 

[homeskillet305]

go through the basics, clean iacv, check for vac leaks, all that good stuff

 

[pignose_S13]

i would do that.. idk i have a sr and when i come up to lights and go to neutral itll drop rpms to like 400 and come back up to normal never thought anything of it lol.. but yea just go through all the IACV vac leak.. stuff like that should be someting really dumb happens to me all the time the stupid shit that happens will haha

 

[4wheeldrifts13]

^your problem seems like vac leak(most likely from leaky ass B.O.V)

OP: How is the car running when it isnt sitting still or after driving to stop? like break up? spuddering? bogging? anything? more info would help? or video recording it would be even better. Distance doesnt help diagonosing.

 

[DefyingGrip19]

OP: How is the car running when it isnt sitting still or after driving to stop? like break up? spuddering? bogging? anything? more info would help? or video recording it would be even better. Distance doesnt help diagonosing.

no spuddering or bogging but i sometimes feel a slight loss of accel as if i was giving it less gas...but it last like half a sec. its super quick.. and not really noticeable. i drive it everyday so its noticable to me when small stuff like that happens...