FI-TECH needed help PLEASE DESPERATE
Racer
Joined: Mar 2019
Posts: 327
Likes: 75
From: west mi. / ms. gulf coast
I don't know what kind of fuel line you have but 125 Psi is waaaay to much . If you have a regular line with standard screw type clamps you are lucky the connection stayed together. That could have resulted in a big boom. What does FiTech have to say about the excessive feel pressure? and what would their ideal pressure be at the throttle body?
Drifting
Joined: Aug 2015
Posts: 1,939
Likes: 477
From: NSW, Australia
C3 of Year Finalist (track prepared) 2019
The Fitech throttle body has a regulator, should regulate to 43psi (I think?) for the 400hp model and 60 psi for the 600hp model like I have. How much fuel is coming out the return into the bucket when you are measuring 100psi at the inlet to the throttle body?
Last edited by Metalhead140; Sep 13, 2019 at 06:13 PM.
Thread Starter
Racer
Joined: Jul 2017
Posts: 399
Likes: 115
From: chico ca
Heavy flow of fuel. FI-tech said there is a by-pass when pressure is to high. FI-tech said fuel pump is bad sending a new one. Hope that solves the problem. I am optimistic because it did run great for a couple of months then it started having problems and fuel pump got louder.
Drifting
Joined: Aug 2015
Posts: 1,939
Likes: 477
From: NSW, Australia
C3 of Year Finalist (track prepared) 2019
Yeh, seems unusual for it to be the pump, I'd be suspecting the regulator personally. The fact that the pump is able to create so much pressure would make me think that the pump is good.
Racer
Joined: Mar 2019
Posts: 327
Likes: 75
From: west mi. / ms. gulf coast
The Fi Tech throttle body has a preset and is non -adjustable fuel pressure regulator built into it. It is set at 58 psi. Now that you have tested with multiple gauges and have verified readings of 125 PSI into the throttle body from the pump and 100 PSI out the return line , the regulator is jammed up also. The new pump should be somewhere in the 60 -80 PSI range which could easily be regulated. I see a new throttle body coming your way also unless the internal regulator can be changed out.
Le Mans Master
Joined: May 2003
Posts: 8,877
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From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
Heavy flow of fuel. FI-tech said there is a by-pass when pressure is to high. FI-tech said fuel pump is bad sending a new one. Hope that solves the problem. I am optimistic because it did run great for a couple of months then it started having problems and fuel pump got louder.
When you fill up your air compressor- the pump makes a much different sound as tank's pressure goes up- same concept.
I really don't think its the pump....
Richard
Last edited by Richard454; Sep 13, 2019 at 11:46 PM.
Drifting
Joined: Aug 2015
Posts: 1,939
Likes: 477
From: NSW, Australia
C3 of Year Finalist (track prepared) 2019
The Fi Tech throttle body has a preset and is non -adjustable fuel pressure regulator built into it. It is set at 58 psi. Now that you have tested with multiple gauges and have verified readings of 125 PSI into the throttle body from the pump and 100 PSI out the return line , the regulator is jammed up also. The new pump should be somewhere in the 60 -80 PSI range which could easily be regulated. I see a new throttle body coming your way also unless the internal regulator can be changed out.
Last edited by Metalhead140; Sep 14, 2019 at 07:22 PM.
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Burning Brakes
Joined: Sep 2010
Posts: 799
Likes: 26
From: Lexington Park Maryland
I saw the post, yes I should have read all the reply and assess where you are with your problem. I am an installer for the FiTech system. Can you PM me and let me know where you are? I will re-read your post and assess where I can help. this system is great once the settings are correct.
Thread Starter
Racer
Joined: Jul 2017
Posts: 399
Likes: 115
From: chico ca
Update on fi tech
FI tech sent new fuel pump. Replaced old pum and pressure went down to 85. Car started and seems to run great. Will take it for a long test drive tomorrow and see what happens when it gets hot.
Thread Starter
Racer
Joined: Jul 2017
Posts: 399
Likes: 115
From: chico ca
Update
I installed new fuel pump and pressure went down and car seems to work pretty good. I need to adjust a few numbers in program but so far so good. It is funny because I asked for a new fuel pump 6 months ago. Go figure.