A little background...I just bought this truck from someone who bought it from the guy that put the supercharger on it.
Long story short, I'm not sure what modifications have been made. It has a powerdyne supercharger, FMU, inline booster pump, headers and high flo cat, different injectors(though I'm not sure what they are). Now to the problem.
Under hardacceleration, the truck reaches a certain point then it feels like the fuel has been shut off. Is there something in the computer thatwould be causeing the engine to shutdown at high boost?

 

Do you mean like a gov. Cause i think that comes in aroung 5000-5500 rpm. Not sure exactly what rpm it starts to shut it down.

 

What kind of FMU? Does it look like it's been tied in to the ignition as well?

 

be safe and remove the supercharger, after that put it in a box and ship it to my house

 

^[sm=badidea.gif]
I happen to be an OFFICIAL s/c recycling station, and ....... we pay shipping!!

 

you must not know my business...were a non-profit government sponcered orginization. We collect used superchargers, refurbish them, and donate them to a good home. My cause is soooo much more noble than yours

 

All the money we get goes to Al Gore so he can buy his kids hybrids, thus enabling them to tear up the highways at 100mph all jacked up on drugs.

 

im sorry, your right, thats a much better cause. GOOOOOOO PRIUS!

(we do also retrain used lions as well, with the hopes of mauling color coordinated gay trainers.)

 

Wow...this went bad in a hurry...haha. I'm not sure what FMU it is, I think it came with the powerdyne supercharger kit. There are no wires going to it...it is just a vacuum operated fuel pressure regulator.

 

FMU is fuel management unit

In a nutshell, the FMU adjusts fuel pressure when the boost comes on, regulating it at normal levels during normal operation and dramatically increasing it on demand. It is purely a mechanical device, using different sized disks inside the unit to alter the pressure at which the FMU takes effect. This makes it relatively easy to install and adjust.