throttle/idle problems

[Pete_89T2]

Originally Posted by j0riakh1

Yes that's the nipple, but what could that have to do with the car starting?

The stock ECU relies on the fact that by design ALL the air that engine burns is supposed to go thru the air flow meter (AFM), which the ECU uses to set the correct air/fuel ratios. More air flow means more fuel is injected. Having a vacuum leak that large results in lots of unmeasured air bypassing the AFM, resulting in a very lean AFR. This could make it difficult to start, but it might not be your only starting problem.