Fi tech - MustangForums.com


General Tech Ask model specific questions in the appropriate category below. All other general questions within.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-04-2018, 03:36 PM   #1  
Aweaver
Thread Starter
 
Join Date: Dec 2017
Location: PA
Posts: 9
Default Fi tech

I put fi tech fuel injection on my 65 it has a 302 . I can't get it to stop falling on it's face when I stand on it. I've tried everything. Anyone have any ideas?
Aweaver is offline   Reply With Quote
Old 01-07-2018, 08:09 PM   #2  
tw1234
1st Gear Member
 
Join Date: Oct 2008
Location: Manitoba
Posts: 69
Default

http://fitechefi.com/tech-posts/fite...-instructions/

Don't know much about this system. Have you set the accelerator pump as per basic setup instruction? I'd try their support service if you can't solve it. Good luck.
tw1234 is offline   Reply With Quote
Old 01-07-2018, 08:21 PM   #3  
Aweaver
Thread Starter
 
Join Date: Dec 2017
Location: PA
Posts: 9
Default Fi tech

I have tried everything I know to try and I did call their tech line but never had any luck. Other than the big stumble when you stand on it, it runs pretty darn good
Aweaver is offline   Reply With Quote
Old 01-09-2018, 01:15 PM   #4  
Derf00
6th Gear Member
 
Join Date: Feb 2005
Location: AZ
Posts: 11,206
Default

Ideally, get it on a Dyno and get a A/F reading or install a wideband guage and the accompanying sensor so you can make the appropriate adjustment or, follow the adjustment instructions in the manual.

Accel pump/ Fast Accel adjustment:

If the system is having a hesitation or bogging issue, and you IAC steps are between 3-10 at warm idle, then your next step would be to adjust the accel pump function to increase or decrease the fuel added on acceleration. To start with turn the key to the on position and then find Go EFI Tuning on the main menu and press enter. Then find Accel pump and press enter. You will see a menu with multiple different settings, you need to focus on the Accel pumps (20f, 65f, 170f) and Fast Accel (20f, 65f, 170f). These setting adjust how much fuel, at varying temperatures, the system injects when you accelerate. Accel pump is used for any normal throttle input, Fast Accel is for any fast throttle inputs or Wide Open Throttle.

Hesitation: If the vehicle has a hesitation (when you step on the throttle and the engine does hangs and/ or almost dies and then suddenly take off) this normally is a lack of fuel so you would fix this by increasing the Accel Pump (for normal throttle input hesitations) or Fast Accel (for fast throttle or WOT inputs). You would make changes starting in increments of 10, to the temp range that you are finding the issue to reside in.

Bogging/engine loads up/slow to respond: If the vehicle is bogging (when you step on the throttle and the engine is slower/sluggish to come up to a higher rpm) this is normally caused by over fueling. To fix this you would need to reduce the amount of fuel it is injecting as an accel pump shot. To do this this decrease the Accel Pump (for normal throttle input hesitations) or Fast Accel (for fast throttle or WOT inputs). You would make changes starting in increments of 10, to the temp range that you are finding the issue to reside in.
Derf00 is offline   Reply With Quote
Old 01-11-2018, 10:01 AM   #5  
Aweaver
Thread Starter
 
Join Date: Dec 2017
Location: PA
Posts: 9
Default

My IAC steps are 10 . I've changed the accelerator pump settings so much it's nuts . I'll probably wait till spring and get it on a dyno. Thanks I have really been tempted to put a carb on it . But I hate to give up on it.
Aweaver is offline   Reply With Quote
Old 01-11-2018, 10:13 AM   #6  
proeagles
3rd Gear Member
 
Join Date: Dec 2008
Location: LA
Posts: 772
Default

I had the same problem with a FAST system I tried to put on a 351 mildly built in my 32 hot rod with side pipe exhaust. According to the tech folks, my O2 sensor must have been too far down stream or too close to the collector or too close to where the muffler and collector joined with a slip joint fit. There was always going to be a slight leak at that point because of the way the system was made. My point is that every thing they said was related to the O2 sensor. Put a Holley Street Avenger carb on and never had another problem. Out of curiosity, are you using the Fitech fuel pump gizmo that mounts in the engine compartment or did you install a real fuel injection fuel pump?
proeagles is offline   Reply With Quote
Old 01-11-2018, 10:25 AM   #7  
Aweaver
Thread Starter
 
Join Date: Dec 2017
Location: PA
Posts: 9
Default

I have their fuel pump under the hood
Aweaver is offline   Reply With Quote
Old 01-11-2018, 02:50 PM   #8  
proeagles
3rd Gear Member
 
Join Date: Dec 2008
Location: LA
Posts: 772
Default

I wonder if that contraption actually works since it is taking less fuel pressure and boosting it appropriately via a very small collection tank. I know Edelbrock is doing something similar now but if you are getting fuel at say 7 lbs and then making operate at 45 lbs, how long will that reservoir of 7 lb fed fuel last at 45 lbs which is typical of a fuel injected engine.
proeagles is offline   Reply With Quote
Old 01-11-2018, 03:03 PM   #9  
Aweaver
Thread Starter
 
Join Date: Dec 2017
Location: PA
Posts: 9
Default

The only problem I have is when I floor it once it gets the RPMS up it will pull hard till it gets to the rev limiter. I talked to a guy today about putting it on his dyno . So hopefully sometime next month we will give that a shot.
Aweaver is offline   Reply With Quote
Old 01-12-2018, 12:38 PM   #10  
Derf00
6th Gear Member
 
Join Date: Feb 2005
Location: AZ
Posts: 11,206
Default

Quote:
Originally Posted by proeagles View Post
I wonder if that contraption actually works since it is taking less fuel pressure and boosting it appropriately via a very small collection tank. I know Edelbrock is doing something similar now but if you are getting fuel at say 7 lbs and then making operate at 45 lbs, how long will that reservoir of 7 lb fed fuel last at 45 lbs which is typical of a fuel injected engine.
That's how Direct Injection cars work. They have a pump in the tank that sends it at roughly 30-60 PSI then a secondary High Pressure pump that sits right on the fuel rail attached to the head/intake and bump the pressure up to some ungoddly PSI figure (like 30,000).

I would think that a system that would be running at a much lower PSI (50/60) would work, unless the component itself is faulty in this case.
Derf00 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
G tech pro Sean Off Topic 9 08-11-2007 04:55 PM
Gen. TECH: NON-Model specific GEAR Tech & Questions Dan04COBRA General Tech 0 08-17-2005 05:05 PM
ford master tech 67aquafastback New Member Area 3 08-30-2003 08:19 PM
tech question AmericanBullitt General Tech 3 04-09-2003 01:30 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 01:13 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.