I let them soak in carb cleaner and then use a small wire brush on them.

They can get a buildup on the shaft that can make them stick open. If
you can blow through it it is stuck open.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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rick wrote:
>
> how can an EGR valve be cleaned? it comes off easy on between intake and exhaust
> manifold and the intake side port is full of soft oily sludge but I suspect the port
> should not be sprayed with any chemical as that would move inside the intake
>
> is there any way to determine if EGR is stuck open and if it is, how can it be closed?