I have posted this in a few other places, thought youd find this helpful Just Came across this in the February 2. Motor Magazine and thought that I should share this as this is a very common thread here on the FTE forum. Owners of some 1. Ford Trucks with the 5. L two valve engine may complain of an intermittent rough idle. One likely cause, says Ford, is noncommanded EGR flow. A stuck open EGR vlave is ultimately the culprit. Fender Guitar Serial Numbers Search. To make a definitive diagnosis, connect your scan tool, start the engine and allow it to reach normal operating temperature. Next, allow the idle to stabilize, scroll down to the DPFEGR PID on the scanners display and write down the voltage. Now disconnect the vaccuum hose to the EGR valve and connect a vaccuum pump to its port. Pump the vacuum up until the EGR valve is wide open, then bleed off the vaccuum. Record the DPFEGR voltage again. Repeat this procedure several about 8 more times. If the DPFEGR voltage increases by. EGR valve is probably stuck open. Try tapping the casting with a wrench. If the voltage decreases and the idle now gets smooth, the valve is definitely sticking. Replace it with a revised design, Part No. XL3. Z 9. D4. 75 CA. Trucks that can benefit from the upgraded EGR vlave are 1. F 2. 50 light duty pickups, 1. Lincoln Navigators, 1. E series vans, 1. F super duty pickups and 2. Excursions. Tom Rosario Feb. Motor Magazine Service Slants lt message. Find fiat 600 Postings in South Africa Search Gumtree Free Classified Ads for the latest fiat 600 listings and more. Ford Scanner (F-Super)' title='Ford Scanner (F-Super)' />Up to 75 Off Ford F250 Repair, Service Owners Manuals.