FiTech EFI system

RBConvert said

that's great info Phreakish. My IAC counts bounce between 3 - ~15; going to try your suggestions.
BTW, did you get this info from FiTech or did you have previous experience tuning EFI? And now I'm wondering if FiTech is more a tuner product than the other brands, because I know a few FBBO members that have the FAST system and they didn't have to fine tune anywhere near as much as this system. The flip side, FAST users had more install issues, mostly related to ignition noise interference.

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I haven't spoken with FiTech at all.

I don't find the amount of setup cumbersome at all. My engine is a pain in the rear - 318 with too much cam, lots of stall, tall gear, and I live in the desert.. I wouldn't expect any system to work right out of the box.

I'm familiar with EFI systems, but have never tuned before. I did some logging and whenever I realized something was going on that I didn't like, I would focus on it gather data around that issue and then look at what was changing and impacting that specific thing. For example, the idle issue I noticed the learn values bouncing a lot. That clued me in. The system was well on it's way to learning, but I'm a tinkerer - I kept changing the idle setting, ignition timing, etc. Every change throws the system for a loop and can cause some teething pains, but I can't help myself. I noticed that a decent learn value around the idle rpms is pretty easy to establish quickly on a warm engine - and since there's plenty of idling to be had, a very low learn value tends to help keep it from overshooting in either direction while keeping variability low.

I had a bad tach signal for a while too, and even had my pickup at the distributor wired backwards for a while - caused all kinds of drama. The signal issue turned out to be a burned (damn header) wire. The backward wiring was making it impossible to start warm, and even before I switched to the timing control on the FiTech, the signal to the EFI wasn't working near as well.