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Resolved!!! Mine was the catalytic converters! Clogged. Pulled the sensors out and BAM! The rpms revved up past 2K! Smoothly. Didn’t want to go through the hassle of possibly snapping a bolt to the block so had a local shop with some good bros do it for its laborsworth and parts. Didn’t snag me...

2004 Explorer V8 4.6L SOHC After much consternation and BS diagnosis from brand named muffler shops and others, including Ford $tealers, I need to ask about problems with the EGR valve, if anyone has any performance problems with a stuck valve? Latest indication is the EGR valve is stuck and...

Geez, I've got the same problem, starts fine but won't go over 2Krpm. Went to dealer, said replace plugs and #5 ignition coil, clean injectors~ $1600! Did it on my own, ran injection cleaner, dry gas, cleaned throttle body too. Replaced fuel filter. Still dogging. Throwing no codes on my hand...