My 1993 351 95K miles is having acceleration problems. It feels like I'm dragging an anchor when I step on the gas. Already did a complete tune up. New plugs, wires, cap, rotor, fuel filter, new K&N drop in, PCV. Old plugs looked good so I pretty sure ignition is OK. I do need to check the base timing however. The entire engine is stock with all the emission equipment in place and I believe operational.

Borrowed a fuel pressure gauge today. With KOEO I hear the fuel pump whirl for a second or so but I have 0 PSI at the rail. I crank her up which by the way I have to crank her for a while before she catches. Been that way for the four months I've owned her. Once running, idle or 3000RPM, I have 30-32 PSI fuel at the rail. Do I need a new pump?

Found a posting here about clogged cats and I checked my intake vaccuum as suggested. My vaccuum dropped from about 19-20 at idle to 15-16 at 2500RPM. All the vaccuum lines are in good shape and properly routed. Sound like bad cat?

I pulled the codes the other day and I got 334 KOEO which I believe is EGR position sensor above closed limit. I'm not sure if this means the sensor is bad or the valve is not in the proper position.

As always, I appreciate any tips. Great forum, can't count the times I used info found here in my four months as a Bronco owner.

 

I had a problem like this about a week after getting my Bronco. After checking everything, I found that I had a bad fuel filter. It's a direction to check, and it's pretty cheap.
Good luck.