Hi me73,Jetblast, thebuzzard, Just want to update this post. I have put proper vacuum caps and or plugs in all the previously mentioned jury rigged plugging and a couple of other points to rule them out with vacuum leaks and problem continues. I noticed the tape covering port on FPR was gooey so I cleaned and resealed along with altering fuel pressure from 47 normal +-5lbs without any effect. Sprayed serpentine belt with water as suggest no change.
I ran my iphone around using db meter app and it seems the loudest between TB and FPR. This was a slight whistle when it first started months ago and has now turned into an ear piercing whine that would put any exhaust drone to shame. It does vary with engine load when on the hwy.
I tried the propane test with hose and ran it all over the intake area with no change. I have grabbed every hose and part moving, covering etc trying to see if I could alter pitch,volume and I can grab the DBW assy on the TB and cause some change.
A little background on the car it has REV300, surge tank, catch can, CAI, PPI headers and was raced for years by previous owner. I've had it a year and added new BOE tune, headers and CAI to the previous setup.
Just took another video and found by grabbing DBW TB I could alter the whine and I could feel vibration in the DBW. See link
Got back on LT and in searching I found this link https://www.lotustalk.com/forums/f25...lebody-374753/
and it indicated a broken intake manifold bolt. When I just went back out to check lo and behold the head of my bolt in same location was broken off and the bolt came out by finger. I'm keeping my fingers crossed and once I get a bold tomorrow i hope it takes care of my noise as I was reluctant to get it on the track sounding like that.
I hope it takes care of it and if it does thanks LT and Mobius97
Just talked with Andrew at BOE and mine being the early REV300 didn't have the ARP stud and bolt upgrade. I'm hoping the threads are ok and going to pick up a proper bolt for now and over the winter I'll do the upgrade. Richard