mk2.5 1.8 vvt

[Alanmx]

Hi
A friend of mine bought 02 mk2.5 1.8 vvt with only 45k that was parked up for nearly 2 years .
Starting no problem but it is idling high and if you bring it up off idle it starts to hunt up and down . It drove with no problems into storage seemingly but when previous owner went to bring it out of storage this problem happened .
So far replaced by previous owner was air flow meter and throttle body . theres a trouble code that refers to idle speed lower than expected
any ideas much appreciated ??

[Steve]

leak in the intake between air flow meter and engine? Missing rubber bung on one of the ports on the intake manifold? Idle air control valve a bit stuck?

this article also worth a read : https://miata.net/garage/isc.html