Fuel pressure problem.

[Dannj]

Im sure the pump in my truck is old and tired so this week i will replace it. My question is , could anyhting other than my pump cause my fuel pressure to do this.........

97 7.3 bad fuel pressure - YouTube

97 7.3 bad fuel pressure - YouTube

[Patrick Feeley]

The pumps do have a pulsing fuel pressure due to their mechanical nature (probably not that extreme ... although if that gauge is not liquid filled, which helps dampen the pulsing readings, it could be pretty normal). You can check the fuel pressure regulator spool valve and bore for scoring or check the spring for kinking or bending. Make sure you regulator return screen is also clean. Cheers!

[southend]

I have heard others say that bad injector orings or seal could allow combustion gas back into the fuel system. may want another opinion on this. I dont think your guage should look like that, and i would not change a fuel pump that is bad on a hunch.

[Dannj]

thanks guys, im gonna tear into it this week and try and figure out whats going on. i also forgot to ad that this truck stutters hard and misses when you really get on it. new hpop and oil in the res

[whitepowerstroke444]

i have a '96 and my truck does the same thing i have had 2 pumps go bad and i replaced both of them with brand new pumps. i put new fuel lines in all around the engine along with an entirely new fuel bowl (it also comes with a new regulator on the side of it). i also dropped the tank and checked the fuel pickup along with all the lines all the way up the where they go into the engine, they were all clear and clean. i also put in new injectors and VC gaskets, (which ALMOST completely eliminated the shuttering, it does it occasionally). and about a year ago i did the ICP sensor. but in the end i still have the crazy fuel pressure id love to know what it is.

[Dannj]

Originally Posted by whitepowerstroke444

i have a '96 and my truck does the same thing i have had 2 pumps go bad and i replaced both of them with brand new pumps. i put new fuel lines in all around the engine along with an entirely new fuel bowl (it also comes with a new regulator on the side of it). i also dropped the tank and checked the fuel pickup along with all the lines all the way up the where they go into the engine, they were all clear and clean. i also put in new injectors and VC gaskets, (which ALMOST completely eliminated the shuttering, it does it occasionally). and about a year ago i did the ICP sensor. but in the end i still have the crazy fuel pressure id love to know what it is.

yeaa i think im gonna end up replacing everything. if you replaced all your stuff and it still shutter and accelrates poor....could it be the torque converter?

[whitepowerstroke444]

no it has to do with the engine because it responds to the thorttle, and the truck also starts hard in the cold. i want to try replacing the IPC sensor in the HPOP

[Dannj]

ok gotcha.....these trucks are getting irritating hahah

[whitepowerstroke444]

haha yea i cant figure this one out

[Nashotah7]

I think I would try another guage first.