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Fuel pressure falls under boost...

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Old 01-12-2009, 02:05 PM
  #11  
Big Top Gt
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Originally Posted by explict
Your wires are different from mine.
I had a yellow data wire going from one module to the other. This wire was loose on the second fuel pumps connector shell.

Whipple gives you a whole new harness, plug and play. Did the Saleen kit tell you to wire it yourself? That is probably the difference between our harnesses.
Yeah, that's EXACTLY what they do. (And the write up isn't all that great.)

Pin to pin, I wonder if we're wired up the same way.
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Old 01-12-2009, 02:15 PM
  #12  
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I would say that they are wired up the same way, just maybe your having the same problem as I did. But the colors are different!
I would send an e-mail to Saleen and ask them. That's how I found out about mine. If they never told me I would have never found out!
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Old 01-12-2009, 02:16 PM
  #13  
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It was a short drive and I didn't get all the way WOT.



As for Saleen, try getting them to answer the phone. Do they even work any more?
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Old 01-12-2009, 03:04 PM
  #14  
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What are the numbers on the left?
I am assuming the numbers on the bottom are seconds..?
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Old 01-12-2009, 03:39 PM
  #15  
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could you remove the black tape and
take a picture of this area
Attached Thumbnails Fuel pressure falls under boost...-gt500pumpwires.jpg  
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Old 01-12-2009, 06:39 PM
  #16  
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It's the white wire in the factory plug for the factory FPDM.
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Old 01-13-2009, 09:55 AM
  #17  
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Originally Posted by rkozola
I remember reading about someone having a similar problem with the gt500 setup. It ended up being that one of the fuel pumps/fpdm was not working.
Bingo!
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Old 01-13-2009, 10:03 AM
  #18  
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Originally Posted by explict
That was me it happened to.
The harness going from one module to the other had a loose data wire.
the wire was simply not turning on the second fuel pump.
The single pump could easily handle up to 5psi ish, but then would start dropping off.
Some guy with whipple had the same fuel pressure problem. Turned out the shop forgot to plug in the second fpdm.
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Old 01-13-2009, 08:17 PM
  #19  
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Originally Posted by moosestang
Some guy with whipple had the same fuel pressure problem. Turned out the shop forgot to plug in the second fpdm.
wow!! Imagine he blew his motor? and that was the only problem!! The shop would feel stupid...

My car handled it pretty well, when I first got the ***** to bring the car past 3000rpms with the supercharger on, and started loosing fuel pressure, it was almost like traction control kicked in. It felt like the car knew before I did and it did something so I didn't blow up. Almost like the car wouldn't allow the blower to reach past 5 psi... I know pretty well that if that happened in some other cars, you could say goodbye to the motor.
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Old 01-14-2009, 06:54 AM
  #20  
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If I plug in the factory connector into either FPDM, the car runs and drives.

The FPDC still maxes out at .500 with any sort of aggressive throttle input.

Here's everything I've tried so far to get this to work properly:

http://www.modularfords.com/forums/s...99#post1292999
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