1. Registration trouble? Please use the "Contact Us" link at the bottom right corner of the page and your issue will be resolved.
    Dismiss Notice

Fitech Efi Install

Discussion in 'Early CJ5 and CJ6 Tech' started by Steve's 70-5, Oct 20, 2021.

  1. Oct 20, 2021
    Steve's 70-5

    Steve's 70-5 Active Member 2020 Sponsor

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,326
    Installed a FiTech EFI system for my V-6 Jeep. After some research decided to go with FiTech, as there system will work with the odd fire, as long as you have a HEI Distributor with a square wave signal. Had to buy a adapter plate to bolt the FiTech to my manifold. Got a adapter plate off of EBay. The install was easy, one of the biggest issue was dealing with the length of the wires on the wiring harness.

    I installed a FiTech Force Fuel, this is a 1/2 gallon tank I attached to the firewall next to the brake power booster. Fuel is pumped to this tank and tank has a fuel pump in it that boost the pressure to 58psi. for the EFI, there is a return fuel outlet on the Force Fuel. I did not want to have high pressure fuel lines under the Jeep, so this is why I went with the Force Fuel.

    I have driven the Jeep just around the neighbor, not much. Need to get the front end aligned. When taking off from a dead stop, I would see black smoke coming out of the exhaust pipe. I talked to FiTech and adjusted the AFR at idle and this helped a lot. The Jeep is driving much better than the carburetor that was on it.

    Got the engine idle set at 725 and it has a smooth idle. The hand held shows the RPM jumping up and down, yet the idle is smooth. Talked to a FiTech tech about this and he said that the ECU looks at the RPM and there is a fast processor that adjust everything. (I am not very technical). The RPM gauge in my cluster has a needle and this stays steady.

    What little I have drove the Jeep I am very happy with the way it runs. Will need to adjust the EFI in the future, but per FiTech, when a adjustment is made, you need to drive it for a while and make another adjustment. Do not make several adjustments at one time.

    [​IMG]

    [​IMG]

    [​IMG]
     
    homersdog, Twin2, melvinm and 6 others like this.
  2. Oct 21, 2021
    truckee4x4

    truckee4x4 Grant Kaye 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Truckee CA
    Joined:
    May 30, 2008
    Messages:
    1,261
    Congrats! Hope it just gets better and better for you.
     
  3. Oct 21, 2021
    Jeepenstein

    Jeepenstein Me like Jeep..

    North Central FL
    Joined:
    Jun 15, 2003
    Messages:
    1,843
    How much was that setup?
     
  4. Oct 21, 2021
    Steve's 70-5

    Steve's 70-5 Active Member 2020 Sponsor

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,326
    Bought it in the spring. I am sure prices have gone up. Go to Summit and you can see current cost
     
  5. Oct 21, 2021
    Wmi68CJ5

    Wmi68CJ5 Let the Sun Shine! 2020 Sponsor

    Twin Lake MI
    Joined:
    Aug 10, 2006
    Messages:
    664
    Is it this one?

    FiTech Fuel Injection 35203 - FiTech Go Street EFI 400 HP Self-Tuning Fuel Injection Systems with Force Fuel Systems
     
  6. Oct 21, 2021
    Jeepenstein

    Jeepenstein Me like Jeep..

    North Central FL
    Joined:
    Jun 15, 2003
    Messages:
    1,843
    roger
     
  7. Oct 21, 2021
    zinertia2

    zinertia2 "and which part are you keeping?" 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Greencastle , IN
    Joined:
    Feb 15, 2018
    Messages:
    154
    No crank trigger? Just the tach output of the HEI ?
    Thanks
    Dennis
     
  8. Oct 21, 2021
    Steve's 70-5

    Steve's 70-5 Active Member 2020 Sponsor

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,326

    Tach signal only
     
  9. Oct 21, 2021
    Steve's 70-5

    Steve's 70-5 Active Member 2020 Sponsor

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,326

    The EFI is FiTech #39001, this is a two barrel TB.

    The Force Fuel is FiTech # 50004, They just came out with a smaller Fuel Force, about half the size. Would make mounting easier.

    I think I ordered each part separate, no kit.
     
  10. Oct 21, 2021
    Jw60

    Jw60 WRPD855 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Sedalia MO.
    Joined:
    Apr 8, 2008
    Messages:
    2,680
  11. Nov 2, 2021
    zinertia2

    zinertia2 "and which part are you keeping?" 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Greencastle , IN
    Joined:
    Feb 15, 2018
    Messages:
    154
    Any update on how well this is working?
    Dennis
     
  12. Nov 2, 2021
    masscj2a

    masscj2a Member 2021 Sponsor 2020 Sponsor

    Chester Mass
    Joined:
    Dec 27, 2013
    Messages:
    709
    Yes, I'm real interested in results on this system. Been waiting a few years for a EFI system that runs out of the box for the oddfire.
     
    dnb5853 likes this.
  13. Nov 3, 2021
    Steve's 70-5

    Steve's 70-5 Active Member 2020 Sponsor

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,326
    What little that I have drove it, I am very happy with it. The RPM on the handheld jumps around but it idles fine. Does nut rev up and down. Winter time is starting, do not know how much more I will be driving it. The ECU does not start learning till the engine reaches 170 degrees. Since our weather is moving into fall and things are cooling down the engine temp is running about 165, not heating to that 170. The heater in the Jeep is working as a second radiator, need to deal with this. Still got a little rich fuel mixture at idle. Need to adjust AFV at idle but need to drive it a little more. Another issue is when our RV is parked at the house, it blocks the door to the Jeep garage, so it is stuck inside.
     
    Last edited: Nov 3, 2021
  14. Nov 3, 2021
    masscj2a

    masscj2a Member 2021 Sponsor 2020 Sponsor

    Chester Mass
    Joined:
    Dec 27, 2013
    Messages:
    709
    Steve do you think it was worth the money spent to improve on the 2G ? I've been wanting to upgrade to FI but its hard to get good analysis when there is little info out there on the odd-fire. I have several Dauntless engines and am planning upgrading to FI on at least two of them, but want two of the same to help with the pain of setting them up and keeping them adjusted.
     
  15. Nov 3, 2021
    truckee4x4

    truckee4x4 Grant Kaye 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Truckee CA
    Joined:
    May 30, 2008
    Messages:
    1,261
    I am by no means an expert. In my understanding the RPMs on a Dauntless are always going to bounce around on a handheld or timing light without feeding the computer an even prm signal from either A) a mechanical rotating trigger/sensor combo on the crankshaft or distributor, or B) some type of electronic filter to convert the un-even signal to an even signal. If you can adjust the target idle speed in the EFI's ECU to a value that is lower than what you want, this should stop the idle air control valve from rapidly opening and closing that makes the engine hunt for idle.

    Also, I feel your winter pain - I live at 6,000 feet and my garage lacks insulation....so it's very cold!
     
  16. Nov 3, 2021
    Fireball

    Fireball Well-Known Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Pullman, WA
    Joined:
    Feb 9, 2018
    Messages:
    3,721
    Note these are two different things. Your timing light is only hooked to one cylinder and it fires exactly once every two rotations of the crankshaft at the same timing. If it's bouncing around, it means your mechanical/vacuum advance is doing something or the distributor has a problem.

    The ECU however, is seeing a signal from all the cylinders. So in two full revolutions it sees pulses in the following degree increments: 150-90-150-90-150-90. Since the ECU is expecting evenly spaced spark events, it thinks the engine is turning slower at the 150 degree intervals and faster at the 90 degree intervals. The engine may or may not idle poorly depending on how the ECU reacts to the unevenly spaced signal. If it reacts slowly enough not to adjust idle speed or fueling due to the perceived engine speed changes it could run fine. It would depend on the ECU and it's programming.
     
    FinoCJ and truckee4x4 like this.
  17. Nov 3, 2021
    zinertia2

    zinertia2 "and which part are you keeping?" 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Greencastle , IN
    Joined:
    Feb 15, 2018
    Messages:
    154
    Talked to FITech and they said they would customize the software for an odd fire for free and email it for you to put on your unit. They said all they need to know is the firing angles (90 and 150 fixed, thanks Fireball!)
    Dennis
     
    Last edited: Nov 3, 2021
    Fireball, truckee4x4, Rich M. and 2 others like this.
  18. Nov 3, 2021
    Fireball

    Fireball Well-Known Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Pullman, WA
    Joined:
    Feb 9, 2018
    Messages:
    3,721
    90 and 150. It's fantastic they'll program it for odd fire.
     
    dnb5853 and Rich M. like this.
  19. Nov 3, 2021
    Rich M.

    Rich M. Shoe salesman 2022 Sponsor

    Maryland
    Joined:
    Mar 23, 2008
    Messages:
    1,570
    That makes it very attractive. Sorry about your luck overdrive, delete from Summit cart.
     
  20. Nov 3, 2021
    Steve's 70-5

    Steve's 70-5 Active Member 2020 Sponsor

    Louisville, Ky
    Joined:
    Nov 12, 2009
    Messages:
    1,326
    I could not get a carburetor to work for me, bought a rebuilt one and it did not work. I rebuilt one and it did not work. Explored the EFI and went that way. Fitech said it would work with the odd fire. Jeep is running good, so I guess money well spent.

    I also like the Force Fuel, you could run a fuel line from your mechanical fuel pump to the force fuel and be done. The Force Fuel has a return fuel line on it.
     
    Last edited: Nov 3, 2021
    masscj2a likes this.
New Posts