Re: Mis-firing during accelearation/under load
Problems with EVAP usually never cause a drivability issue. I've seen them cause a car to take a few seconds longer to start, but that was it.
With most misfire issues it comes down to ignition. Always use motorcraft plugs in these engines, they really don't like anything else. Also go with a decent set of wires, I go with Borg Warner wires, a little pricey but they have a lifetime warranty. If you do replace your plugs and wires make sure to use anti-seize on the plugs and put some dialectric grease in the boots.
If your engine has the 8 plug set up your problem is most likely coming from the exhaust side. These are the main plugs for the engine. The drivers side (from what I've heard, and read) fire during the exhaust stroke to ignite unburned fuel.
Part Quality Engineer (Electronics) for Mercedes-Benz US International
University of Tennessee Electrical Engineering Graduate
2000 XLT 2.5L A/T
Explorer Autodim Mirrors w/ Autolamps
Explorer Sport White Face Gauges