Fuel Fuel pump issues

PIMTOUT

Founding Member

Apr 22, 2002

298

9

19

kingsford,mi

Aug 25, 2020

#1

• Aug 25, 2020

• #1

Hey guys.Been 5 years since I drove my car. So I get it started and drive it some and notice under boost the fuel pressure dropped. so I let off and just took it home.Its now been a few months and when I try and start it the pumps dont prime and the car doesnt start. Im going to dig into it this week ,But this is my question. I have the old 255 and T-rex set up in the car. Is that still ok? or is there anything different now? This is and old system and something tells me Im going to be putting in a new pump anyways.

 

Steel1

Mustang Master

Aug 18, 2017

1,419

639

143

Connecticut

Aug 25, 2020

#2

• Aug 25, 2020

• #2

You can get bigger than 255lph now, 340lph and up.
Do you need more than a 255lph , how much boost ?

 

PIMTOUT

Founding Member

Apr 22, 2002

298

9

19

kingsford,mi

Aug 25, 2020

#3

• Aug 25, 2020

• #3

15-16 lbs @6200 rpm

 

Steel1

Mustang Master

Aug 18, 2017

1,419

639

143

Connecticut

Aug 25, 2020

#4

• Aug 25, 2020

• #4

Yeah I would look at a larger pump, then you could eliminate the boost -a-pump,
It's been a few years since my cars been boosted but I'm guessing you're
may need to upgrade fuel lines to support it.
Not sure of your power levels but once you start heading north of 550-600 hp stock fuel lines become a problem

 

PIMTOUT

Founding Member

Apr 22, 2002

298

9

19

kingsford,mi

Aug 26, 2020

#5

• Aug 26, 2020

• #5

fuel lines and everything has been ok for years with this setup. i just found out last night that both the in tank and t-rex are shot. so i was just wondering if i should replace both or just do something better.

 

Steel1

Mustang Master

Aug 18, 2017

1,419

639

143

Connecticut

Aug 26, 2020

#6

• Aug 26, 2020

• #6

If it were me I would upgrade to a single larger pump .
Something like this , although you wouldn't need the hanger if you're staying with stock lines.

83-97 EFI Mustang Stealth 340 & Hanger – Aeromotive, Inc

 

Reactions: PIMTOUT

PIMTOUT

Founding Member

Apr 22, 2002

298

9

19

kingsford,mi

Aug 27, 2020

#7

• Aug 27, 2020

• #7

Steel1 said:

If it were me I would upgrade to a single larger pump .
Something like this , although you wouldn't need the hanger if you're staying with stock lines.

83-97 EFI Mustang Stealth 340 & Hanger – Aeromotive, Inc

Click to expand...

Thats what Im leaning to. I just hear stories of heated gas in the line. But wouldnt I have had that same issue with the 255 in tank and the T-rex ? or does that work different.

 

elarm1

10 Year Member

Dec 17, 2010

1,428

652

154

N.Va

Aug 27, 2020

#8

• Aug 27, 2020

• #8

Im using an Aeromotive 340 unit and have no problems .02.

edit: you still have a Myspace account??!!

 

Reactions: PIMTOUT

PIMTOUT

Founding Member

Apr 22, 2002

298

9

19

kingsford,mi

Aug 28, 2020

#9

• Aug 28, 2020

• #9

elarm1 said:

Im using an Aeromotive 340 unit and have no problems .02.

edit: you still have a Myspace account??!!

Click to expand...

Hahahaha NO I dont have Myspace...Thats how long ago its been since my mustang has been on the road. LOL

 

S

Shuttleman83

Active Member

Jun 30, 2019

239

13

28

USA

Aug 28, 2020

#10

• Aug 28, 2020

• #10

I would've put iso heet in the night before, primed it 3-4 times before start, and then clear flood the injectors. Maybe thats just me though.

 

Reactions: PIMTOUT

PIMTOUT

Founding Member

Apr 22, 2002

298

9

19

kingsford,mi

Aug 28, 2020

#11

• Aug 28, 2020

• #11

Well both pumps are shot. Im removing the T-rex stuff and going with Gss340 ( 255HP) pump by its self.