Hey guys,
Just curious if any of you have had trouble with the fuel pressure relief valve on the LLY engines... I have one that I believe is a suspect based on the symptoms encountered.

I have one truck that runs this same tune great, the other periodically bogs down off the line or loses pressure at around 70 mph @wot.... it sometimes does it on less powerful tunes as well.

The truck that's having issues is 360-400rwhp.

Let me know some symptoms that you've encountered if any... thanks!