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Strange Idle Behaviour

Noel

By Noel,
in R Series (R30, R31, R32, R33, R34)

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Noel Community Regular

Noel

Posted
Posted

Hi have a manual 33 with rb25det...anyway since i have had it it has always idled at approx 700-800pm with a slight miss occasionally but its very very tiny...anyway since i ran my car at WSID 2 weeks ago i have noticed that it has been idling higher at around 900-1000rpm...its not all the time tho...sometimes its as before & sits lower, other times its at 700rpm then creeps up to 1000rpm & other times its just higher straight away...when i ran it i took out air filter panel but put it straight back in after so i have done an ecu reset as i thought maybe it was all confused with diff air/fuel ratios etc from when i took out filter but still doing it?...im not worried as its not idling at 2000rpm or anything & still runs the same but what could be the cause of this?

Thanks

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Sumo Mentor

Sumo

Posted
Posted (edited)
could the fact that i took out filter of caused the ecu to run overly rich therefore causing carbon build up in aac valve?

Umm, No. Running rich wont touch your Idle speed controller. On my R33 the throttle body gets a gummy type build up on it.

Cheers

Sumo

P.S. A vacuum leak will affect your idle.

Edited by Sumo

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