Eaton SC'd and FMIC engine stalls when coming to a stop

[casperlynn]

See post 66 for a new video depicting my situation.Looking for some advice..preferably from someone that has the same setup, an Eaton supercharger with a front mount intercooler.

My problem...the FMIC has been pressure tested and does not leak. When it is connected, quite often the engine dies when coming to a stop, especially when braking hard. When coming to a stop slowly, the engine usually stays alive.

As soon as I disconnect the FMIC, the engine NEVER stalls when coming to a stop. My problem seems to have something to do with the intake pressure drop when gearing down and coming to a stop.

Can my AFC NEO by programmed to compensate for the pressure difference or is that even my problem?

Thanks in advance!

[SOHCStealth]

Are you running a Blow-off valve that vents to the atmosphere? Or is it a recirulating type? Some cars have problems with open-air BOVs.

[casperlynn]

Originally Posted by SOHCStealth

Are you running a Blow-off valve that vents to the atmosphere? Or is it a recirulating type? Some cars have problems with open-air BOVs.

Thanks fore your input. The Eaton M90 has a an internal "blow-off " vent that allows compressed air to recirculate. An auxillary BOV is not required.

[J-Groove]

Have you tried increasing your idle on your throttle body through the biss screw?

I had to raise my idle a little bit when I went TT from N/A. It could be something that simple.

-John

[Mr.3000]

Originally Posted by J-Groove

Have you tried increasing your idle on your throttle body through the biss screw?

I had to raise my idle a little bit when I went TT from N/A. It could be something that simple.

-John

Yea I agree with John, I have some troubles sometimes too. I would increase the idle a bit.

[casperlynn]

Hey John, thanks for the input but that was actually the very first thing I did when I realized I had a problem. I did not help at all.

It was such a pain, I have temporarily disconnected the IC from the supercharger. It has not stalled since. It has something to do with the FMIC and SC relationship. I am anxious to reconnect the IC but I won't until I can find the solution.

[J-Groove]

Originally Posted by casperlynn

Hey John, thanks for the input but that was actually the very first thing I did when I realized I had a problem. I did not help at all.

It was such a pain, I have temporarily disconnected the IC from the supercharger. It has not stalled since. It has something to do with the FMIC and SC relationship. I am anxious to reconnect the IC but I won't until I can find the solution.

Well shoot, I was hoping it was something easy.

I have actually not heard of a SCed car using a FMIC, now a heat exchanger (virtually the same principal, but runs coolant instead of air)

Could it be that when you come to a abrupt stop, your car slows the charger to idle speed, thus decreasing the air it pushes to the point where it is not creating enough force to make it the distance of your intercooler?

I know it is a long shot, I'm just trying to understand what could be happening.

The problem is, if that is the case, I have no idea how you could go about to fix it.

I'm still new to forced induction in general.

I can ask some of my friend who are SCed, though they are all on mustangs.

-John

[casperlynn]

Could it be that when you come to a abrupt stop, your car slows the charger to idle speed, thus decreasing the air it pushes to the point where it is not creating enough force to make it the distance of your intercooler?

John, that is exactly my delima....but I do not know how to remedy the situaton............that is what I get for being unique with my setup. I HAVE GOOGLED the same and absolutely nothing comes back as being the same or similar. I really think, if I reconnect the AFC NEO (and find someone that knows how to program it) that it will remedy my problem as I know it is something to do with the intake air presssure, which can be adjusted. I just do not know how!

I appreciate your help as no one else is offering anything.

[casperlynn]

Originally Posted by WhiskeyIsQuick

connect a pipe from ur throttle body, into the car. and when u come below 5mph, start blowing into it with all the air u can push outa ur lungs. Problem solved, thank u, i charge by the hour :-D! lol im jk. Mayb a belt issue? doesnt sit properly, or too tight, and at low rpm's, not enough force for it to spin?

Tried that too, but i blacked out ha! The 6 rib belt setup is perfect and is not the problem. My research thus far is proving my AFC NEO has a feature to dial in the intake air pressure. I just need to find a local tuner shop that knows how to do it. Mechanically, I am skilled but deaeing with loggers and electronic reprogramming of the ECU is beyond my capabilities. It is odd that I can't find anyone out there with the identical setup, to walk me thru this.

Thanks for all the input peeps!