As it got a bit warmer (therefore started raining) today I had another look at my idle system.

I discovered by eye a small rift at the joint section of the hose ICV > bend. In order to check if it is a leak I used brake cleaner. Nothing happend. This time (once I already checked all hoses with a flammable fluid without "success") I sprayed the brake cleaner directly into the air flow meter to test what happens: nothing. How can this be?

My EHA current still fluctuates around 0mA for 1s and then up to -8mA for another 1-2s. Hence I do not believe that my mixture is this rich that further richening (with brake cleaner) would show no impact.

On the other hand, when I unplug the ICV my rpm goes down (not up). This already encouraged me in the past to search a leak.

Anyone with an explanation for this?

Cheers Tom