Well, EGR valve seems fine. I put 15 inches of vacuum on it (engine off) and it held. Then while engine running, applied vacuum and the engine almost stalled. So, I'd say the diaphragm is working properly and I believe that would indicate there is not too much carbon build up.
Since it seems to...
I will check the EGR valve next then.
I feel very confident that my problem is some kind of vacuum leak, whether it's a popped/cracked/broken hose or other component failure. All symptoms seem to lead me in that direction.
OEM. We were on vacation 1,200 miles from home. The auto parts stores in town didn't have one, but the Ford dealership did. Both hose connectors had cracked off. The hoses were hanging down, unconnected, with the plastic tube piece still inside the ends. Yes, The DPFE with two downward hose...
Vehicle: 2003 Eddie Bauer, 5.4L Triton. 210,000 miles.
Issue: After vehicle has warmed up, the engine runs rough. Intermittent stutters. Poor performance under load. At times, lack of power under acceleration. Very poor fuel mileage. Average in-town MPG has dropped from 13 to 8. No check engine...
I've got a similar question.... same year/model: 2003 Eddie Bauer.
My problem is the clear plastic part that covers the bulb is missing. Anyone know where I can find a replacement?
We only have one wrecking yard here and they don't have any 2'd gen Expeditions at all that I can scavenge.
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