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Old 01-25-2016, 07:37 PM
pernikm pernikm is offline
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Default Odd Fuel pressure on 2010 M8 turbo

Little help with this. My M8 is running about 50 psi fuel pressure at idle and does NOT raise fuel pressure with boost. It also drops fuel pressure relatively quickly like to about 30 psi in a couple minutes after the engine us off. I've checked to boost reference line to the back of fuel pump but it looks ok. Has anyone had issues with boondocker's copper cap set up on the pressure regulator? Is there a replacement regulator? do I have to buy the whole set up again? should I just run a screw all the way into the pressure regulator and install a blocking type inline adjustable fuel pressure regulator with a boost reference like the Fuelab 57504? I tried to find a MSD 2222 regulator but apparently they don't make it.

Any help is cool

Karl
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Old 01-25-2016, 08:22 PM
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what ever you pick still has to have the 1/1 ratio. you can look into the cpc set up as your in ut.
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Old 01-26-2016, 06:48 PM
pernikm pernikm is offline
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Yeah...looked at the drawing on the Fuelab 575 series and it says 1 to 1 on pressure. Maybe CPC's set up is better/cheaper. I can try OVS also.
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Old 03-18-2016, 06:43 PM
pernikm pernikm is offline
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Ok. An adjustable fuel pressure regulator seems to have solved a whole bunch of issues. Cleaned up the bottom end and now the AFR is reading 12's on long pulls, but I am dumping a lot of extra fuel at high boost and high throttle position to keep them low. I also have still have a nagging dead spot right at engagement. It's just like you hit the kill switch for a fraction of a second. last time I was loading the sled up the ramp I could actually get it to go on, off, on, off etc. I checked the sweep on the TPS...seemed fine...maybe I moved the throttle too quickly and missed the dead spot?
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