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Re: po401 code egr valve
If anyone wants to get the EGR valve off of a 94 Escort, I think the tool to use to unscrew the metal tube that comes from the exhaust manifold & fits into the bottom of the EGR valve, would be a 1-1/16" crowsfoot refrigeration wrench - with 6 points. (and use of plenty of penetrating oil). It would take a pretty good 'tool' store to have one though.
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