[Mustangr]

Just had it dyno tuned was running great and now..... Just coming into power band boost starts to increase then it starts holding back. I see fuel pressure fall off completly. If I stay in the throttle it backfires it surges badly.
what gives internal pump maybe T-rex filter Hmmm

[millhouse]

Originally Posted by Mustangr

Just had it dyno tuned was running great and now..... Just coming into power band boost starts to increase then it starts holding back. I see fuel pressure fall off completly. If I stay in the throttle it backfires it surges badly.
what gives internal pump maybe T-rex filter Hmmm

Any drop in fuel pressure would typically indicate a problem with either the pumps or the filter. Either pumps would be adequate for your power levels by themselves…..so I would first look into replacing the fuel filter.

What is your base pressure set at? What fuel pressure regulator are you running?

[Mustangr]

I found a couple problems. Open Vacum and a kink in return fuel line. Opps

[Black1987Stang]

So all is good now? what was wrong?

[Mustangr]

I dont know. Now the brand new MSD distributor that I got with the Accel DFI kit is now faulty..I had to return it to MSD. We will see. I want to get the
Stealth kit from Aeromotive. Has anyone had problems or info about it.