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What is the best way to make sure you don't have a vacuum leak in the vacuum chamber.<p>As far as I can tell there are two hoses that go to the chamber. One goes through a check valve to the aluminium intake. The other hose goes to the VRIS solenoids. If I take the one side off at the aluminium intake and close it off completely and then take the other hose off of the Y connector that goes to the solenoid valves and pressurize the chamber. If the I can pressurize the chamber there is no problem. If I can't it means the Vacuum chamber or hoses inbetween are leaking.<p>I tried above and I couldn't pressurize the chamber. I hear air leaking from the system. I am not sure if the check valve acts like a relief valve also or if the chamber has some sort of relief.<p>I hope someone can help...

vacuum chamber? whats that?

If you check the online manual section F2-103 it is item 5. They are hidden away and impossible to see if there are any cracks. If there is a leak the vacumm will be low and the VRIS values probably won't open properly. I am having hesitation problems and I know there is a vacuum leak somewhere but I can't find it.

I had the same problem and used a vacuum gun with a gauge and founded where the crack was. I was sure that were the VC because when I tap it´s vacuum source, I couldn´t hear the vacuum leak. I used dual component paste to repair them and no problem anymore! Be careful on dealing with them because heat makes them to harden and are as fragile as glass!!