1998 ford ranger 3.0 "u" Fuel pump problem

What engine ?

Hi, Needs a new fuel pump sorry to tell you. Please leave me feed back: Malcolm Campbell, Thanks.

It could be the problem. The old wire may have been delivering less voltage than the new wire. Now that the wiring is good, too much voltage is going to the feulpump regulator. You need to have the fuel pressure checked.

I would suspect that you have a failing fuel pump, the fuel pump pressure is bleeding off due to a faulty check valve, this causes hard starting esp when cold or after sitting. The fuel pump is located inside the fuel tank, the fuel tank must be removed to replace the fuel pump assembly.

Without seeing it it is a hard thing to diagnose. You could have an injector leaking, possibly a fuel line. Do you smell gas? Sometimes with fords around the fuel filter leaks because of a broken clamp. The o rings around the fuel injectors could be leaking, or one of the rubber fuel lines. If you go off road alot, you could have a pin hole in one of the rubber or metal lines. Check and get back with me and I will do the best I can to help. Hope tis helps.

Its possible that its the pressure regulator. But its more likely that its the fuel pump or even the fuel filter You say it olny starts to run bad when you give it more gas. If it were the pressure regulator then it wouldn't matter becaues what that dose is keep the fuel pressure constant under all driveing conditions. Although the problem could be to much fuel witch could mean the regulator is allowing to much fuel to enter the system. Pull some plugs out and see what they look like they should be a tan color if the engine is running good if there gas fooled wet and black then its is to much fuel if there kind of white then its running to lean and its not enough fuel and you should check the delivery system pump and all filters well good luck

the EGR valve needs to be changed out.........Hope this helps.

sounds like fuel pressure bleeding off. Bad fuel pump or bad pressure regulator on fuel rail. Can you hear pump run for 5 seconds when you turn key on? do this twice, 30 deconds apart and see if it starts ok.

I would check the coolant temp sensor.

sounds like you have a regulator problem if your fuel pump has a built in regulator it might have went bad or if it is separate from the fuel pump it may be bad. fuel injected engines have to reicive the right amount of fuel if your regulator is not workin its dumpin to much fuel into the engine