New fuel pump still same problems?

[mustangfan]

[ame="http://smg.photobucket.com/albums/v488/awesome316/2001MUSTANG/?action=view&current=Video0003.flv"]http://smg.photobucket.com/albums/v488/awesome316/2001MUSTANG/?action=view&current=Video0003.flv[/ame]
Watch the gauge when i start the car up. What the hell is causing this.

 

[irishpwr46]

the spike? not sure. the fuel pump turning on and pumping fuel to an engine thats not ready for it maybe.

 

[mustangfan]

No idea but when the guage is in the 50's the car has all kinds of power. Where it is now riding in the 30's its a dog.

 

[irishpwr46]

do you have a regulator?

 

[BubbaStanGT]

Never threw any codes? How about Fuel rail pressure sensor/ regulator?

 

[mustangfan]

Nope not a single code. I have a feeling who ever owned this before me put in bigger injectors but never replaced the fuel rail pressure sensor/regulator. Now here is my question where do i get a high performance one?

 

[BubbaStanGT]

I have an OEM sensor, not sure if theres a diff b/n our cars. Yours is a six right?

 

[mustangfan]

Yeah sixxer it is.

 

[BubbaStanGT]

Well if you need the sensor and the one I have will work for you let me know. From Ford it was $100+. First we need to find out if that is really what you need. When I had my fuel issue I got error code for the sensor, dropped the 100 bills and it didnt fix it, thats why I have the extra now.

 

[Tokyoke]

My gauge did that just before the sender died. it might not be a problem with the FP. Also if they had larger injectors installed it have to be tuned for them or youd be having alot worse problems.

No need to change the fuel pressure regulator it will wrk fine with any size injectors.unless its going bad and you will get a CEL when it goes.

 

[SSChris NY.]

When the car is at idle, pressure should be anywhere from 26-32lbs., I don't see where your think your car is starving for fuel, at WOT your fuel pressure is then bump up by your ECU up to and anywhere from 32 to 42lbs. as your ECU demands fuel as needed, true your FPR or fuel pressure regulator, just a little FYI, hope this helps

 

[mustangfan]

Yeah that clears up most of it. No it acts like it when you get right on it. Especially climbing hills it acts like it is not getting enough fuel.

 

[mustangfan]

Also everytime i start the car i get a different reading too.

 

[SSChris NY.]

Also everytime i start the car i get a different reading too.

Go to your auto parts store, like Auto zone, and buy yourself a real fuel pressure gauge, the mechanical type, mount it to your fuel rail and go for a ride, they come with a long hose, that way U can read it from the inside as your driving, Good luck

 

[mustangfan]

Awesome never thought about that. Will try that and see what the readings are and get back to ya.