FPR Vacuum connector question
04-19-2007, 08:21 AM
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Car: 86 Iroc Z28
Engine: 350 5.7L (rebuilding now)
Transmission: 700R4 shift kit
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FPR Vacuum connector question
I was wondering about the vacuum connector that hooks to the FPR. What exactly is it's purpose (the vacuum connector) and can I just plug it off or is it absolutely necessary to have vacuum there?
Thanks,
Pat
Thanks,
Pat
04-19-2007, 09:11 AM
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Re: FPR Vacuum connector question
It is necessary.
The fuel pressure is supposed to change as the engine vacuum changes. Think about it.... vacuum = reduced pressure in the manifold; no vacuum (WOT) = higher pressure in the manifold; higher pressure in the manifold = less difference between fuel pressure and manifold pressure = less fuel flow. In other words, just when you need the most flow, the system gets it flow automatically reduced.
The FPR overcomes that.
The fuel pressure is supposed to change as the engine vacuum changes. Think about it.... vacuum = reduced pressure in the manifold; no vacuum (WOT) = higher pressure in the manifold; higher pressure in the manifold = less difference between fuel pressure and manifold pressure = less fuel flow. In other words, just when you need the most flow, the system gets it flow automatically reduced.
The FPR overcomes that.
04-19-2007, 09:18 AM
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Re: FPR Vacuum connector question
Ok, thank you very much! I appreciate all the info!
Pat
Pat
04-19-2007, 10:50 AM
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Re: FPR Vacuum connector question
Can you also tell me which vacuum line hooks to the FPR? Looking at diagrams, it appears that there is one coming from the throttle body plenum but I'm not sure which one.
Thanks,
Pat
Thanks,
Pat
04-19-2007, 01:22 PM
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Re: FPR Vacuum connector question
bump...
04-19-2007, 03:25 PM
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Re: FPR Vacuum connector question
bump again... Does anyone know which vacuum line hooks to the fuel pressure regulator? Looking at diagrams it appears that it hooks to the throttle body plenum but I'm not sure.
Any help would be greatly appreciated!!
Thanks,
Pat
Any help would be greatly appreciated!!
Thanks,
Pat
04-19-2007, 10:31 PM
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Car: 86 Iroc Z28
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Re: FPR Vacuum connector question
bump...anyone have an idea?
Thanks,
Pat
Thanks,
Pat
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