How long since your last major tune up? Is your check engine light on?
http://www.partsgeek.com/gbproducts/MC/5290-07036366.html? utm_source=google&utm_medium=ff&utm_content=MC&utm_campaign= PartsGeek+Google+Base&utm_term=1997- 2002+Ford+F150+EGR+Valve+Standard+Motor+Products+EGV575T+97 - 02+Ford+EGR+Valve+1999+2000&fp=pp&gbm=a&gclid=CP3kncymwbs CFSISMwodEBkAdA
pull this one off and clean it with carburetor cleaner...make sure the bellows is working~
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