I personally own TWO IR 8 stacks both running EZ EFI -- and have installed or worked on helping to set up at least half a dozen others - everything from Brodix headed BBC to SBF's... and every one of them has run flawlessly.
Remember that the EZ EFI ONLY CONTROLS THE FUELING.... nothing else. So while everyone is quick to blame the EFI because it's "new" or it's "self tune" or whatever excuse they can come up with.... every time I've chased someone else's issue -- it's been ANYTHING BUT the EFI.
It's usually some shortcut the installer has taken. Tapping the MAP off the wrong place or a shared source.... or the MSD distributor is installed as it came out of the box (with garage door springs and the wrong stop bushings) so the curve is all wrong.... or the 'Connect straight to the battery' has been ignored. Or the Tach input is wrong and it needs the signal conditioner that is optional... Or some wise guy decides that some sensor isn't really needed... or that he knows more about these systems than the engineers and has the O2 sensor too far back in the exhaust system.... OR the best yet is that there is a simple air leak around the welded in bung causing all manor of erroneous readings.
I think the key to ALL EFI is to stop thinking what you KNOW (or think you know) and start with a fresh attitude to learning about the system you're installing and think about WHY they instruct you to do certain things. Electrical system health and voltage are critical to these systems. That means really good electrical to all the various sensors. Some idiots put thread tape around the fittings making the grounds bad... Trust me -- it's all the little things you USED TO DO that bite you in the ass when you're working on EFI.
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