new motor

[06dmax]

So I got my motor all installed and running its fully built with an s475 I have tuning for it but once I step on It and get back out of It it falls on its face almost like its in limp mode any ever run into a problem like this ?

 

[x MadMAX DIESEL]

Yes I have. And it was in the tuning. It would fall down way low on rail pressure after getting off the throttle. Would almost die, you had to finesse the throttle to bring pressure back up.

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