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Mine started to click real loud at a red light the other day. After I started moving it quit ticking but the check engine light came on. cleared the code and have not noticed any real loud ticking,but it does get louder now and again. Where is the best place to get a purge valve and how much $$$ should I look at spending on a new one. :(
 

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The purge valve is on the right end of the engine. The switching valve is on the left end of the engine. The purge valve is famous for producing a tat tat tat noise that sounds like a noisy lifter. It can be effectively silenced by placing foam rubber pipe insulation under the valve to prevent the noise from transferring to the purge valve mounting frame.
IF the purge valve is failing and getting even louder, insulating it may not help.
 
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