SEL and P0234

[E.carter]

So over the past few weeks I have noticed under heavy acceleration my boost gauge has been fluttering and not staying constant. For example if I roll into it at 45 the entire time boost is climbing the boost gauge flutters back and forth about 10 psi so I dont get a true reading and yesterday heading to my wedding I hit it going down the four lane next to some buddies and it was like I was hitting a speed limiter at 90. truck felt like it was bucking on and off a limiter but kept going faster and didnt throw any dtcs. My groomsman drove it home that night and it threw the sel light so I checked codes when I got home today and it has a P0234 over boost code. Any ideas or help is much apprectiated and I did search it and read on the dtc. Thanks, Eric

 

[SteveFord]

How much boost is it running at wide open throttle?

 

[E.carter]

How much boost is it running at wide open throttle?

Appx.35 psi but recently it started this fluttering crap so its hard to read. I am kinda thinking it started about the time I put my dsp5 in and have been switchin back and forth from stock power to comp. Egr is present but turned off on all tunes except stock would that be a possibility? Thanks

 

[SteveFord]

You could reflash it to the stock os with your big tune and see what it does then. I know sometimes the dsp switches or os can make weird things happen. Mine in this 05 would make the idle bump up right before it came to a stop or if I went 1mph in forward or reverse it would do it. Drove me nuts. I reflashed it a week ago and now it dosen't do it I would try a full reflash with you stock os and see what it does. If it acts normal it may be the dsp.

 

[SteveFord]

Also my lbz ran peak of 32 psi just for info.

 

[BLKLMM]

You could reflash it to the stock os with your big tune and see what it does then. I know sometimes the dsp switches or os can make weird things happen. Mine in this 05 would make the idle bump up right before it came to a stop or if I went 1mph in forward or reverse it would do it. Drove me nuts. I reflashed it a week ago and now it dosen't do it I would try a full reflash with you stock os and see what it does. If it acts normal it may be the dsp.

X2 on dsp . Had issues with mine