Need fuel help asap

[brys00gt]

I have been remote tuning my car with a great tuner. Sunday out of the blue car falls on its face at 4000 rpms during a wot data log. Get home look at log, fuel psi goes from 59 to 15 when this happens.
I hook up a mechanical gauge to verify and it replicates what the log shows.
Tried again and now it is doing it under part throttle as well.
I dropped the tank, pulled pump and check lines for kinks or holes and nothing.
Replaced pump ,aem 310 new in may, with a focus 255 pump and same thing happens both wot and part.

Filter is clean and flows. I'm stumped and tryi ng to figure out any more things I should troubleshoot and what it could be. I'm leaning towards fpdm but any input would be great.

 

[DHG1078]

Have you talked to your tuner yet? It could be an issue with the tune itself since everything was fine until the remote tuning.

 

[DHG1078]

what other changes did you make to require a tune?

 

[brys00gt]

Tuner said it's not in the tune since we've been remote tuning for a few revisions and this is the first time it's done it.
It's a v2 addition fully forged bottom end, stage 2 heads and cam that made it necessary for a new tune.

 

[spray'n mach 1]

if you're running one fpdm you are going into thermal shutdown mine did the same thing it scared me so bad that I just went return style. at 5000 rpm mine went too 0 fuel pressure then two 70psi. good luck hope this helps

 

[brys00gt]

I am running one fpdm with only one pump. I really don't have the cash rt now to go return

 

[spike_africa]

FPDM is going out. These cars are getting older now so its going to happen.

 

[brys00gt]

Found the issue. Tune file was corrupt