fuel pump does not stop priming
I got the mean street 800 hp system on my truck this past weekend. Its a 429. I have driven it for little over 130 miles and now it wont start. I went to start it for the first time today and the fuel pump runs continuously when I turn the ignition key on. It will fire for about 1-2 second then die and wont fire again unless I let it sit for a few minutes. I don't have a fuel gauge, but i did crack the line at the throttle body and there is pressure with the fuel pump running. I thought I might have run out of fuel, but I dumped 5 gallons in the tank and it did not change. I also noticed that when I looked at the settings in the initial startup menu, they were all way off. It said it had 253 cylinders, was 6000 something cubic inches, RPM limit was at 650000 something. I reset all of those and it did't change anything. I have the fuel system setup with a return line. I am running an AEM inline pump as close to the tank as I could get it. Its a 385 lph pump. Any ides on what I should look at first?
I put the mean street on mine also. Here's the steps I would start with for yours:
- Put a efi fuel pressure gauge at the fitech fuel inlet. Should read 43-58 psi, but no lower or higher.
- Ground fitech throttle body to ground strap from battery negative
- Run fitech power red wire directly to positive battery terminal (not anywhere else)
- fitech white wire needs to come off of relay triggered by ignition on and powered by battery terminal
- O2 sensor needs to be welded to pipe (to prevent any leaking)
- Battery needs to be fully charged so you get a minimum of 10 volts DURING CRANKING
- Put in new spark plugs, or if you know how, thoroughly clean them if needed
If you do all these it will run better to at least start tuning AFR at idle and IAC steps.
When you think you have done that correctly, generate a log file and post the link here.
Good luck
So I think I found my problem. I started going through the hand held controller and finding other parameters that were way out of range, like way above what you can even enter into the controller. I reset the unit back to factory specs, and now the fuel pump primes the correct amount and it fires up! I have the unit powered post my battery kill switch, so i think what happened is that I killed battery power too soon after shutting the truck off and corrupted the files on the unit. I am going to run the power wire direct to battery now.
Hey Nick.. I mean Gick 🙂 ... Do you remember what the parameters were that were way out of range? I'm having a very similar issue. Did adjusting those parameters permanently solve the problem?
Thanks in advance~
Pete - you can backup your current settings - just load the default ones and reconfigure them to your setup. this could help you start over.
or you can go through the pro settings -> fuel pump -> (can't remember settings location specifically , it may be somewhere else, but fuel prime is what your are looking for) and verify the fuel pump prime is around 5 (seconds) .
Quote from gicknordon on January 2, 2020, 12:30 pmSo I think I found my problem. I started going through the hand held controller and finding other parameters that were way out of range, like way above what you can even enter into the controller. I reset the unit back to factory specs, and now the fuel pump primes the correct amount and it fires up! I have the unit powered post my battery kill switch, so i think what happened is that I killed battery power too soon after shutting the truck off and corrupted the files on the unit. I am going to run the power wire direct to battery now.
How do you reset the unit back to factory specs