Full boost at 2-300 rpm's.... whats going on

[kre8ive_kustomz]

I finished the fmic on the AWD today. Earlier, before I put the bumper back on I took it around the block and it turned over really hard, like there was no charge on the battery, started turning faster then started. i spooled it up one last time before turning into my driveway and it died. She started right back up so I thought maybe with the bumps one of the clamps loosened up, none did. I put the bumper back on just a bit ago, was going to go for a little drive so I could log the difference of the fmic/stock and took off from the light, into second under right around 15lbs and I heard a loud pop. I turned onto a side road and took a look, figured a coupler blew off but nothing..... it would start and idle extremely low, factory boost gauge showed it topped out, pillar gauge(tee'd into rail regulator) showed nothing. I walked like 10 blocks home, grabbed another car and went back to look with a flashlight. I looked at every junction and found nothing, I was going to start it again to see if I could hear a leak so I did so, started right up and idled perfect, both boost gauges fluctuated perfect, I got out and listened under the hood, found nothing. I moved the other car and got back in the awd, went up a block, turned around and got up to the stop sign and it died again. I hooked up the laptop to see if link could pickup any codes but got nothing......

It ran normal for a bit after it cooled off so it shouldnt be any one the fmic/piping. when i heard the pop it sounded like it came from the center or right side of the car. i felt inside the bov, piston is still sealed. the wg seems to be in the right position..... im just lost. I cant see a bcs or egr poping like that, it was frickin loud. I dont know whether or not the hard cranking is related but it just started today and i had it disconnected while installing all the piping. i cant think of a reason for that to happen out of the blue...... When it was idling low i could hear a buzzing/ticking above the fuel injectors, wasn't the pulsing of them, not a noise ive heard before. anyone heard of a similar situation? Its got me lost.

 

[turboglenn]

Sounds like maybe the factory MPD (manifold pressure differential - might be labeled MDP though) sensor might have stuck throwing the ECU for a loop as to what it needs to do. But honestly i'm not very well versed in DSMlink and what sensors it retains or what one's can be gotten rid of. But from the factory boost guage being stuck pinned to the top, it sounds like there's either a sensor or some wires gone bad.

Good luck, i hate chasing electrical gremlins.

 

[kre8ive_kustomz]

its was a coupler blown off the ic piping, i still dont know why its turning over hard though.