Originally Posted by Jack_of_Trades

A friend had a similar issue and it ended up being the FPR hose wasn't holding its seal as well from the very heatsoaked engine compartment at the end of long hard pulls on the dyno. The tuner suspected it so he put soapy water on the FPR nipple and sure enough as the pull would reach the top end...bubbles. He gave us the $.05 zip tie for free (what a guy!lol). Problem was solved. Not saying this is the case but it is an area to be addressed regardless. I hear too many stories about the FPR hose popping off, especially on the dyno.