Quad & Rail Pressure
07-30-2007, 10:20 AM
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Quad & Rail Pressure
Under the hood for the 5th time trying to get my RP to read right. Checked all connections into sensors and wiring harness connections. The problem is my Quad reads the same RP all the time, even when truck isn't running with the key turned on to acc.. It sits and flucuates around 24500, never changes more than a few hundred psi. and why would it show pressure if the truck isn't running? Is my sensor shot or might it be the commander? All the other values seem to be fine. Any suggestions would be great.
07-30-2007, 10:25 AM
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Sounds like you have it hooked to ground ( wrong terminal on the sensor ) or the wire is chaffed somewhere to ground. - Unplug it and see what it reads ( the wire at the rail sensor)
07-30-2007, 10:52 AM
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From the instructions it is the right one but I'll try anything at this point, I don't have a multi-meter if thats what you're implying. I'll try other wires and see what I get. Thanks a for now I'll go see what it does.
07-30-2007, 03:12 PM
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I had a question and called the support number and they got on the line pretty fast. I didnt wait long at all. Im pretty happy with my gauge. not happy with my rail pressure lol, but the gauge is pretty cool & half price of an analog gauge.
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07-30-2007, 05:54 PM
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That is not good.
If you still have the Predator Box installed make sure you attch the green wire to the middle of the connector going into the actual sensor. The connection need to be made closest to the motor so you will actually be connecting it to the Predator wiring harness, not the factory harness.
If you still have the Predator Box installed make sure you attch the green wire to the middle of the connector going into the actual sensor. The connection need to be made closest to the motor so you will actually be connecting it to the Predator wiring harness, not the factory harness.
07-30-2007, 06:19 PM
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I would think so, looks like I had mine on the ground, thats why it showed a constant value. From poking around at other threads I'm thinking my RP at WOT of 16000psi is a little low. Maybe I have some fuel bypassing the pressure relief valve or the CP3's getting tired. It is still original with 230k km on it. Something else to think about. Anyone know?
07-30-2007, 06:27 PM
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I am pretty sure you are on the other side. If you had 16K of rail pressure at WOT I do not see how the truck could run all that well???
Is your wire tapped at the sensor itself? It should be on the Predator wiring harness that has the stock looking connector.
Is your wire tapped at the sensor itself? It should be on the Predator wiring harness that has the stock looking connector.