I have an '01 F-150 4x4 S'crew with 5.4L, 155,000 miles. Idles rough, runs rough (at speed, actually cuts out sometimes at speed), low power, pcv valve is clattering loud and it has no codes.
I did a cylinder drop test (pulled each coil wire, then pulled each injector wire) under load and all of the cylinders are firing fine. It has a recent fuel filter, K&N filter recently cleaned, and no water has been sprayed on the engine. I am at a loss for what next. I am thinking that my convertors may be plugged? Anyone have an idea?