Ford 200 explorer

[Tony]

I have a 2000 ford Explorer (sohc) 4.0 L that I have replaced the mass air flow sensor ,spark plugs and wires on .When it get's to 50 mph's and you try to accelerate it cuts out . It is ok when I hold a steady speed but any acceleration after 50 mph it cuts out. I have plugged it into an obdII and it has no codes, the check engine light is not on. Thanks for any help,Tony

[mdshunk]

It is ok when I hold a steady speed but any acceleration after 50 mph it cuts out.

I had a very similar problem with my 4.0 Explorer. If you accellerated slowly and steadily, everything was okay. If you really stuck your foot in it, it was a pretty choppy ride. It turned out to be a sooted up EGR valve. Pretty easy to remove and clean. In my case, though, the EGR passages and orifaces in the intake manifold were also sooted up, and required intake removal and cleaning. Runs nice since that repair. Don't know if this is your problem or not. Good luck.

[Wgoodrich]

Recheck your timing. Remember with a computer the computer will try to compensate for timing. YOu must read your manual and find wires to short to deactivate the computer timing compensation, then retime the distributer. I suspect this may be your problem.

If you recently replaced your rotor and cap you may have damaged your electronic ignition module inside the distributer cap. If this part that rides the lobes has been damaged then it tends to move when the timing is adjusted causing the dead spot in the engine also.

Just a couple of ideas

Wg

[mdshunk]

The 2000 4.0L Explorer a distributorless ignition system. Along Wg's line of thinking, it could be a bad coil pack instead. These can develop high voltage shorts at higher RPM's, that will not set a code on the OBDII system. They are easy to remove, and most auto parts stores can test them for free.

[Frank]

How's the fuel filter?