Just wondering if anyone has maybe experienced this issue. I will be driving along and then all of the sudden it will fall on its face, and won't make any boost stays at -10 vac, engine will shudder and the RPM's will fluctuate and won't accelerate at times. If I turn the car off and then back on it usually will be ok for a while. Check engine light came on with codes P0101 for MAF sensor performance, P2177 for fuel trim lean on accel or cruise bank 2, and misfire codes on all cylinders.

I replaced the MAF sensor and did not change a thing. Found a few service bulletins to check the waste gate actuator which is ok. Confused at this point as it does not do it all the time. Any ideas would we appreciated, Thanks!

 

I'd start to suspect the high pressure fuel pump or fuel pressure regulator, it sounds like fuel starvation to me. Have the fuel pressure checked out.

 

^ yep check the fuel first then check for boost leak would be next.

 

Hey 408, do you have stg1, with the solder or crimps ? By chance.

Sorry I didn't see it in your signature, I'm a little slow, but I would check them out especially the lower one, can cause some weird running if they have gotten rubbed wrong.

 

Thanks for the input everyone. Checked the wires and they look good. Since we had it apart the other day to check the wastegate, it hasn't acted up since. Not sure if something was loose and inadvertently fixed it or not, guess I keep driving it and see.

 

Trash or buildup in the wastegate maybe?