Fuel pressure specifications

You do not have a four cylinder which one six or eight?

Sorry, I meant six cylinder OHV.

Your pressure is within spec. Did you do a volume test? The pump will always put out high pressure when removed, that does away with the regulator that keeps it within spec.
Have you checked for any vacuum leaks in the intake system? Fuel trim may be trying to compensate for a common plenum vacuum leak.
Check the guides below on vacuum leaks and oxygen sensor tests

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

https://www.2carpros.com/articles/how-to-test-an-oxygen-sensor-02-sensor

Vehicle cut out at about 50-60 mph. The cut out is abrupt and intermittent. There are no code from the PCM. Pressure when checked at fuel rail was around 30-32 psi with vacuum, up to 45 psi with vacuum unhooked. Vehicle seems to surge a little bit.

Fuel should be 30-45 psi with key on engine off. Try a new fuel filter if pressure okay tested like I said. Then clean throttle plate on both sides and IAC hole.

What is the proper fuel pressure for a 1998 Ford Explorer, 4.0 l , pushrod v-6 ?

Most fuel injected vehicles need between 35 and 60 psi of fuel pressure to run correctly. Some vehicles will not run otherwise.

Hello. I recently replaced my fuel pump and regulator as they needed to be replaced. Check engine light and cheçk gauge lights came on. Fuel pressure readings were high therefore fuel regulator and fuel pump had to be replaced. However, driving home truck turned off and those two symbols turned on. Fuel filter was replaced on June of 2013 with 63,000 miles on truck. What can problem be now and can I drive my vehicle as is? Desperate as I need to take my son for his MRI on Monday due to his epilepsy getting worse. Appreciate any answers. God Bless and Happy Father's Day!!

you are going to have to see what code it is that is causing the light to go on autoparts can check it.

Hello..code read that it was fuel regulator and fuel pump and that's why I replaced those items. Nothing else shows up. If I take it to dealership I'm sorry to say, they are of no help and charge me for other things that aren't needed.

you still have to do what I said in first reply to see what is wrong.

Took it to see what code showed up. Code for fuel regulator and fuel pump showed up again. Got battery tested as well and it's good.

What should the fuel pressure be on this SUV. This on is holding on 30 while running.

Hello,

Ok, there's no Manufacturer Info fuel pressure while running.

The fuel pressure with Key On Engine Off should be 55 - 65 psi

give us the code numbers

Ok thanks. I am not, by no means a mechanic.However, someone told me it should be checked while running. I will check it again with only having the key on. Thanks again.

It should be check before running and while running. It just that on some vehicles the Manufacturer does list the running pressure unfortunately.

I have a 1992 explorer the factory fuel [ump went out so i changed it then new one lasted about 2 days and the filter cloged up i changed it. then the pump went out so i put another one in. it worked for 3 days and quit puttin out the rite pressure. the shop said the assembly was bad so i bought a hole new pump assembly and all and it worked for about 3 or 4 days and quit. i changed the pressure regulator the relay and ran injector cleaner through it. its only putting out 20 pounds and it will start and idle but spudders then dies. to start it you have to turn the switch a few times to build up pressure. what could cause the pump to loose so much pressure????

Have the ignition switch tested-could be the injectors are leaking and its losing pressure or a voltage drop problem and the fuel pump is not spinning fast enough to produce the correct fuel pressure-

how do i get the ignition checked???

also when i put it in gear to take off it wants to die and if you rev it up wile in parked it chockes out and tries to die

Check the fuel pressure, yours is low

1992 FUEL PRESSURE SPECIFICATIONS (TRUCKS - GASOLINE)
EngineKOER psi (kg/cm2 )KOEO psi (kg/cm2 )

4.9L EFI45-60 (3.2-4.2)50-60 (3.5-4.2)

All Others30-45 (2.1-3.2)35-45 (2.5-3.2)

The other day I went on an errand (10 miles). Came home and decided to go on another short errand! When I tried to start th Explorer it acted as is if it were fllooded and wouldn't start! After 3-5 attempts it started! I ran my errand and was ready to head home when I had the same problem! This time it took 10-15 attempts (pausing between attempts) In 30 minutes it started! When I got back home a neighbor of mine said I have a "fuel pump" problem! Please advise!

Hi:
It could be a fuel pump problem. You need to check pressure. Go to the site listed below. A video will show you how to do it.:

https://www.2carpros.com/dia/test_fuel_pressure.htm

Most nationally recognized parts stores will lend or rent the pressure gauge to you.

Let me know the results. If the pump seems good, we'll move on to other things.

Joe

mine is a 4.0 and the most its putting is 20psi

Sounds like a weak fuel pump that needs replacing-

i have put 3 pumps in they work great for 3 or 4 days then start gettn week. what could cause this???

Check the power at the fuel pump connector could be a voltage drop problem and then get back with me-