FMU ?

I have the adjustable FMU that came with my kit and it's set at 3 turns CCW from closed. I'm not getting the fuel spike on the throttle with my FMU. Fuel pressure is set at 31 PSI w/ vaccuum on. Pressure will jump to 40 PSI on the throttle but that's it. What's my problem? Thanks for any help!

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Originally Posted by Hawaiian5.0

I have the adjustable FMU that came with my kit and it's set at 3 turns CCW from closed. I'm not getting the fuel spike on the throttle with my FMU. Fuel pressure is set at 31 PSI w/ vaccuum on. Pressure will jump to 40 PSI on the throttle but that's it. What's my problem? Thanks for any help!

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Try closing it some. I have my base fuel pressure set at 38 PSI and see it spike up to near 60 under boost. I am only about 1/2 to 3/4 turns from closed.

Also those FMU's have a delay. Even all the way closed it wont kick in tell like 3-4#s, then you will see it spike pretty high..