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Up Pipe leak? Surge? Converter?
I have a new issue arise with my old faithful. After searching for hours upon days on here to find a similar cirumstance, I have to surrender and bug the experts. When I accelerate, about half throttle, maybe a little more, my boost will hit 10 lbs or so, and I will hear a momentary squeel, or squeak. After listening to over and over, it's consistenly happening right before the tranny shifts, mostly from 4 to overdrive, but it has done it going from 2 to 3. I sounds nothing like the surge videos on youtube, and it doesnt match any of the descriptions of the converter.
My mods are 6637, ebpv delete, wastegate actuator adjusted-start opening @ 12 psi, hpx, frx, 5" w/muffler exhaust.
i dont see any more significant signs of soot around the up pipe joint than there ever was, and egt's are normal. One issue I do have is the wastegate solenoid valve on the front of the x pipe is broken, so it was removed, and hose was run direct from the port on the x pipe to the actuator, and the bypass port on the intake tube was plugged, until my new solenoid gets in. Would this be causing any issues with fueling and timing beins it is an electronic device plugged into the system?
No play on compressor wheel, turbo has only 15000 miles on rebuild anyway. No longer has the wicked wheel (early 99), and std wheel got put in at the rebuild. EBPV tube, port, and sensor were cleaned a couple months ago.
Lastly, I am probably going to get a Dieselsite wastegate controller. What is done the red and grean lines at the solenoid? Are they just plugged off?