FITECH EFI 600 Basic and Command center intall with pics, factory tank

[steveo3318]

Ok guys sorry for the delay. I am going to list a few parameters and what they do so please pay attention. Keep in mind the larger amounts that I moved may not be what your truck needs especially if you have an automatic.

KEEP IN MIND I have a 3 speed saginaw with an overdrive which freewheels as soon as I let off the gas. I have absolutely no deceleration from the gears. I wanted mine to drop like my carb.

First lets address the slow decel. Remember send to ecu and key off for 30 seconds after each set of changes.

1. go efi tuning> idle control> Decel open IAC.
I cant remember the factory setting but I think it was 30 or so. The more negative you go the faster it will deccel. I went all the way to the lower limit of -90 which has not had any adverse effects on anything. I suggest a start of -20 at a time. you will hear an immediate response.

2. go efi tuning>idle control>loop rate up and down 2 separate parameters. This does not have alot to do with deccel. But what it did do was slow down the rate at which my truck would idle up and down at a warm start. For some reason I was seeing my truck idle up to the 1200 mark after about 5 seconds after a completely warm start. It should not of been doing this. I set my up to 5 and my down to -30. These two parameters solved this. If your not having an issue with the truck idling past set point 400 to 500 rpms after a warm start leave these alone.

I couldn't be happier with my setup, and its performance.