You should not run one hose to another. They have 2 different jobs...The one closest to the engine..Is that the one on the manifold next to the throttle body? This is post-MAF sensor. AKA in the manifold. If yes, just cap is and test drive. If it operates normally. The you could have a leak at the charcoal evap can or anywhere in the plumbing for that EVAP. ALSO the CLICKING is normal when the engine is driven in hot weather. The hose to the air filter box is pre-MAF sensor and before the air filter and should make no difference unless you have a clogged air filter. Sorry for late input. Let us know how things are now...Jeremy_K wrote:I just went through the trouble to replace my 03 Vibe's alternator only to find out that wasn't the problem. When the car is at a light with the heater running the RPMs drop and the charging voltage drops down into the 12V range when it should be a constant 14+ volts. I was under the hood checking the voltage and I heard a clicking noise that sounded like a valve tapping. I traced it to the EVAP purge solenoid that's connected to the air filter box. I popped the vacuum lines off and if I cap the one closest to the engine the RPMs go up to normal and the voltage stabilizes around 14V. I don't have the money for a new solenoid right now so is it ok to run the car with the hose capped or the 2 hoses connected together without going through the solenoid?