Engine Performance problem
1997 Plymouth Voyager 6 cyl Front Wheel Drive Automatic 112000 miles
We have been working on getting rid of the hesitation in my van when it is being driven. We have changed a number of things, and we checked the fuel pressure today and that brings up the question. The book says that the pressure should read at 49, and it is reading at 54. Is this ok, or should it read at 49 point blank. Since the pressure is higher than asked for, could this be causing the hesitation problem in fuel output. Also could this higher pressure being caused by a bad fuel pressure sensor or maybe the computer itself? We have changed the fuel filter, plugs, pcv valve, rotor, cap, wires, coil, and egr valve. It now seems to run fine, but I guess we are just concerned with the pressure being a bit high.
Thanks for your time.
Fuel regulators will vary a little accross the board. A little high is better than a little low. With the pressure as it is, will not cause a hesitation. I would look at the throttle position sensor if the problem worsens.