Weird idle on start DC5R

[Nuci]

Hey all,

Noticed that when i start my DC5R with a cold engine, the idle wil begin around 1200rpm and slowly climb to around 2000 by itself, and will stay there til it reaches running temp. Only does it on a cold start, once it reaches running temp if i turn the engine off and then back on it is fine.

Normal?

[Chad]

it's normal. Your car does that to warm up faster.

[Nighthawk_S]

Doesn't sound normal to me, on cold start a DC5 on stock ecu should rev to about 2000rpm straight away, hold there for about 30 sec and slowly return to normal idle.

[EVLGTR]

What is the normal idle on a DC5 Type-S and Type-R ?? is it 750rpm - 800 rpm ??

[Nighthawk_S]

Mine idles at 800-850rpm. The operating range is listed on the underside of the bonnet.

[Zinyo]

i dont think its normal either...it should be the opposite; on cold start it should start just below 2000 then as it warms up it should drop to 1000 and after a few minutes of normal driving it should operate <1000rpm

[Nighthawk_S]

It might be a dirty idle air control valve (IACV) which is located on the underside of the throttle body. Apparently these can get a build up of dirt on them and cause erratic idling.

[Nuci]

Doesn't sound normal to me, on cold start a DC5 on stock ecu should rev to about 2000rpm straight away, hold there for about 30 sec and slowly return to normal idle.

Yeah this is what it does, sorry if i was unclear. Might be worth checking the IACV anyways to be sure..

[WATAJK]

i dont think its normal either...it should be the opposite; on cold start it should start just below 2000 then as it warms up it should drop to 1000 and after a few minutes of normal driving it should operate <1000rpm

Correct mate. Mine is the same... anything other then that i wouldn't be over concerned but i'd check your IACV or see your mechanic :)

[WuackR]

I find this to be normal.

Mine varies all the time. Depending how cold it is i guess ?