[FATnLOW]

Also interested your problem and the outcome concerning the  EFI System and the final resolution....hope you can get it resolved to your satisfaction

[munch]

Water in the oil is a concern, more of a hassle than creating a severe  problem. Thinking about this a little more, I helped a buddy of mine put an Atomic EFI on his car. When we started it for the first time it had a high pitch sound, and it was the A/F ratio needed adjusted, as he made the adjustments you could hear the sound change. It sounded like a jet engine, I think this is what your hearing.

  I was just in the shop looking at the Fitech unit and there is a crack in the body which run down into one of the four ports.  I will send a pic when I can.

I haven't dropped the unit, but I don't know if they will believe that.  Can't afford another one right now.

If you had dropped the unit , it would clearly show where on the unit that the blow occurred.
Question is why did the unit crack .Get your magnifying glass out and do a thorough inspection to see if you can determine the reason why.

makes sense , doesn't it , before you try sending the unit back . 

mike

  I looked it over closely and there is no sign of any other damage, only the crack.  I will see what they say.

[munch]

Update...  I spoke with the FiTech technician yesterday who at first sounded skeptical but after seeing the pictures issued an RMA and said they would definitely get it sorted quickly for me as soon as they received it.

[FATnLOW]

Great news....keep us informed on the resolution.....

[TFoch]

That's good to hear!  Keep us updated.

[sammons]

Munch I'm glad they may stand behind it. That sure could be your noise. Good luck, hope they make it right with you!

[munch]

Forgot I promised a picture

[chopper526]

Wow, that's a good one! Glad they stood behind it.

[EDNY]

munch...do you feel that the crack was responsible for the noise?

[62131]

Sure sounds like they are going to replace the unit for you.

[munch]

munch...do you feel that the crack was responsible for the noise?

  Don't know, as it is my first experience with EFI.  When it first cranked it did not make the high pitched whine, it just would not idle down.  RPMs moved around between 1100 to 13 and change and back.  As I remember I cranked it twice like that and shut it down.  The third time I cranked it I got the same thing, but then the noise started.

It is like it was a hair line crack that got bigger.  Does that make sense?  Do you think a crack like that would make the high pitched whine? 

[28chevyguy]

Im sure that could cause some funky issues ,  definitely could explain the high fluctuating idle and a high pitch whistle .  First things first I would not want a crack in any part of my FUEL system , especially on a car as beautiful as yours. 

[sammons]

Munch if that crack doesn't go down thru the base plate, I doubt it's your noise. JMO

[EDNY]

I suspect the noise came from the IAC (idle air control) valve being open. The engine management system needs to adjust air flow into the throttle body and will once it gets into closed loop.  The new IAC was probably wide open sucking in air like crazy until the ECM adjusts it.

[TFoch]

Hey Munch any updates?