Odd idling...?

[Legend83]

Took the '5 out for a spirited drive last night.

Go to drive to work this morning and find she is idling at 1,500-2k - fine I think, when cold that is about right.

But 10 miles down the road, everytime I dipped the clutch the revs would hang around 1,500 rpm.

Usually I would expect idle / neutral to be around the 750 rpm mark....

Any thoughts?

She was driving fine.

[bluetone]

Legend83 said:

Took the '5 out for a spirited drive last night.

Go to drive to work this morning and find she is idling at 1,500-2k - fine I think, when cold that is about right.

But 10 miles down the road, everytime I dipped the clutch the revs would hang around 1,500 rpm.

Usually I would expect idle / neutral to be around the 750 rpm mark....

Any thoughts?

She was driving fine.

Have you disconnected the battery/ECU/main fuse lately?

I had the same symptoms after disconnecting/reconnecting the ECU on my Mk1. This persisted for a couple of weeks but now the idle is back to 'normal'. I guess the ECU was just re-learning the engine/mapping etc.

[sonarbell]

Which 5 is it ? As there are many different types of idle control..

[bluetone]

sonarbell said:

Which 5 is it ? As there are many different types of idle control..

http://www.pistonheads.com/gassing/profile.asp?h=0&memberId=53405&t=879829&f=185&mid=57123

[MX-5 Lazza]

Supercharged! That could be different then! Check for a vacuum leak anywhere between the intake manifold to the AFM. Also make sure all the vacuum pipes (to MAP sensor and boost gauge if you have one) are seated properly and the pipe from the idle control on the DTB to the intake ahead of the AFM (assuming you don't have the dual throttle mod) is in good condition. Also make sure the bypass valve is operating correctly. If all that is fine then it's as before, making sure the base idle is set correctly.

[Legend83]