FiTech EFI system

rednesss said

I've been driving mine now for about 2 weeks, it runs good, but I have a bog/hesitation coming off of a coast situation, maybe doing 40 mph, and then slightly tipping back into throttle. The AFR shoots up to 18-20 and it takes a second to recover. It's kind of irritating. If it were a carb, I'd say it needed a different cam on the accelerator pump. I guess I'm going to have to log it and send it to FiTech to figure out.

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I had similar issues, even a backfire thru the throttle body. 2 things I changed.

I wound up setting my accel pump settings to about 33. Got rid of hesitations. Fitech advised each motor will be different. I would get a lean spike on throttle tip in, so I knew it needed more.

Also when coasting, or off the gas, if the MAP falls below 28 ( i think ) is the default, it cuts fuel, then returns it when the map increases. I found mine seemed to hesitate at first too.

I wound up lowering the map to keep the fuel running longer with the increased vacuum and re engaging earlier.

It took some tweaking, but it's enjoyable changing it from the car and then driving some more to check the changes effects.

Happy to assist if you need anything else. I will be taking mine for a spin on Sunday, once i clean off the foot of snow ( not kidding).. It's Minus 16 celcius here today and I am checking to make sure driveability is good when the temp drops. Going to try short trips every weekend throughout the winter, as long as the roads are dry.

Ken