lumpy idle until motor is at temp

[colin325ix]

Hi< i have a 325ix 5 speed M20 and I am having a issue with when i cold start the car. I start it and the idle is very lumpy almost sounds like it has a cam roll, this lasts for about a minute when its cold out. I have checked for vacuum leaks already. Today, i pulled the harness off the ICV and it stopped lump idle. any ideas???

[martauto]

Hi< i have a 325ix 5 speed M20 and I am having a issue with when i cold start the car. I start it and the idle is very lumpy almost sounds like it has a cam roll, this lasts for about a minute when its cold out. I have checked for vacuum leaks already. Today, i pulled the harness off the ICV and it stopped lump idle. any ideas???

Hi Colin and firstly welcome to the zone mate !!!
You are in the right place for an answer and I`m sure some bright spark will come along and try to help.
Where are you based and lets have tons of pics of your 325ix please ???

Mart.

[steve_k]

first thing i'd try is to clean the ICV out, remove it, spray a liberal dose of carb cleaner in it & the roll it back & forth between your hands till it rattles,

place it back in the motor, start it & see if its still the same or improved.