that hose that you patched is not vacuum related. In the event the fuel reg. fails, it sends the fuel in to the intake and not on the hot engine.

Buy a mity vac and test while the car is running. 15hg is great. Just FYI vacuum (or lack of) will not solve a hard cold start.

I will admit, your engine may be different than my m103, but on my car the eha valve works when the car goes in to closed loop mode. ( the "E" in CIS-E). None of this magic happens when the car in cold. Once the car warms up, then the eha will (should) start to do something.

Either way, the eha will not help with a cold start problem.

Start with a bottle of redline fuel additive, then give the car a tune up. The problem is not one failed part. It is a lot of parts that are not quite good enough.

__________________
Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2