Quote from 4wdautoparts on July 20, 2020, 4:48 pm

Hello,

We have a customer’s 1989 Jeep Wrangler YJ with a GM LS3 running a Fitech 70013(Ultimate Ls Kit For Ls3/L92 - 750 Hp W/O Trans Control) feeded by a Fitech Force Fuel system, part# 50004

This thing has been only problems since we installed it…

List of problems:

• When trying to change initial settings on the handheld controller, can’t save anything to the ECU…there’s always a communication error or  a “can´t find group” error (Check TF card)
• After driving a few seconds the Fuel pressure drops to 0, engine dies.(can’t do the initial setup process I guess a setup issue)
• Passenger side bank stops working (don’t know if this an O2 sensor issue, or setup related issue)
• when trying to Read from ECU, we get “ECU no response” message.

 

Questionnaire from Fitech Tech support:

1. Check fuel pressure on the 50004.

60PSI ,It suddenly drops to 0 after driving for a few seconds.

2. What are you using to feed the force fuel?

Carter P4600HP In-Line Electric Fuel Pump (6-8PSI) …running fine, fuel tank is full.

3. When you turn the key on does the fuel pump prime up?

Yes ..it primes… maintains a pressure of 60  PSI at idle on the 50004 gauge….but when going for a test drive pressure drops to 0 and dies.

4. Also have you checked the handhelds main menu for Fault Code?

Only DTC is P0505, IAC related, cleared

5. make sure that when you are trying to connect to ecu ,you have the key on.

Ehmmm…Ok?

6. check to see if there is at least 10 volts to the key on ignition while cranking.

11.5v while cranking on red ignition wire

7. Unscrew the lid on the 50004 maybe the pump is broken inside.

it’s not broken

8. It’s possible just a bad SD Card. You can replace the SD card with a different brand.

Installed new card. Now we don’t have any files.

 

 

Hope someone can help us get this thing running.