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MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection MazdaSpeed 3/6 - Fuel, Nitrous & Water Injection Have a CDFP fuel pump question? Do you want to add Nitrous or Water Injection to your Mazdaspeed 3/6 ? Please come on in!


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 Old 04-26-2015, 09:50 PM   #1
 
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Default PI Fuel Pressure Problem

So i just finished off installing my PI fuel pressure system. I have it set up just like the diagram attached. Fuel pressure is set to 45 psi at idle with a walbro 450 in tank pump.

My issue is that the hpfp is running 1000-1700 at idle and is making a crazy screaming noise. If i drive the car it will calm down a little and drop down to 200-300 psi when i let off the gas. I cleaned off the split valve cuz it sat with E in the tank for 4 months... didnt help.



Any ideas?
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File Type: jpg PI set up.jpg (70.5 KB, 28 views)
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