Fuel Pressure gauge on FMU
01-18-2008, 08:50 AM
#3
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Location: Hagerstown, Maryland
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well i would like to have a gauge under there i guess for just piece of mind. I just figured it would be easier to put it off the fmu instead of the schrader valve. sometimes when i get into the throttle a little i can hear the car missing, and sometimes it doesn't, So i just want to make sure that my fuel pressure is where its supposed to be, at least at the start. Im going to be getting a dyno tune soon and getting rid of my hypertech i think, it doesn't seem to be a very popular way to tune your car. Which would be the best place to put the gauge, The FMU or off the schrader valve
01-18-2008, 04:33 PM
#4
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Might want to consider a nice electric gauge like from Autometer to mount in vehicle.
I measure at the Schrader. At the very least you would want to measure at FMU discharge to understand what the fuel rails will see.
I measure at the Schrader. At the very least you would want to measure at FMU discharge to understand what the fuel rails will see.
01-20-2008, 12:08 AM
#5
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i already have aem gauges in the car so im looking into getting a aem fuel pressure gauge to put inside. Im a little confused about where the electric sender goes for a fuel gauge, other gauges i know but im unfamiler with a electric fuel pressure gauge. Any help?
01-20-2008, 10:17 AM
#6
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Th electric F.P. sender unit is a transducer that just need to be installed in the fuel system to sample the pressure, in your case, between the FMU and the fuel pressure regulator. The FMU may have a "port" built into it for such a reason, or as it was suggested in an earlier post, use the schrader port that is built into the fuel rail cross-over tube. You will more than likely need to purchase some fittings in order to connect the sending unit to the fuel system. The schrader poer happens to work with a -4 AN fitting. Make sure you remove the actual valve from inside the port first if you choose to connect the sending unit there.
On a different note, you may want to consider eliminating the Hypertech unit from the car now as those units typically will advance the stock timing for more performance. Great for a N.A. motor, but it appears your motor is stock. If running any kind of boost, the timing really needs to be retarded rather than advanced. Just something to consider.
On a different note, you may want to consider eliminating the Hypertech unit from the car now as those units typically will advance the stock timing for more performance. Great for a N.A. motor, but it appears your motor is stock. If running any kind of boost, the timing really needs to be retarded rather than advanced. Just something to consider.
Last edited by Boosted_Z28; 01-20-2008 at 10:23 AM.
01-24-2008, 04:58 PM
#8
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I was looking at the fmu that is on the car. I want to gauge to read pressure while im WOT. So would i want to install it on the fuel in line going to the fmu or the fuel out line going to the fuel rail, or am i not making any sense at all and making this to hard
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