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Bad fuel Pressure regulator ?

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Old 03-24-2013, 01:41 PM
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Default Bad fuel Pressure regulator ?

Have a fuel pressure gauge installed and was wondering if my FPR is bad. I can pinch the vac line and nothing happens but when i pinch the return line it shoots up to to 55 or so PSI(up from idle 38). There's no fuel in the vac line if i pull it off it's new also car is running rich that's why i ask. 94 B18C1
Old 03-24-2013, 01:44 PM
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Default Re: Bad fuel Pressure regulator ?

When you pull the vac line nothing happens? Is there vacuum in that line?
Old 03-24-2013, 01:46 PM
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Default Re: Bad fuel Pressure regulator ?

Originally Posted by grumblemarc
When you pull the vac line nothing happens? Is there vacuum in that line?
the idle goes up that's it, no prerssure change however.
Old 03-24-2013, 02:38 PM
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Default Re: Bad fuel Pressure regulator ?

Correction/bump. when i pull the vac line to the regulator the pressure rises by 8-9 psi
Old 03-24-2013, 02:44 PM
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Default Re: Bad fuel Pressure regulator ?

That's what mine does. Even with an adjustable FPR.
Old 03-24-2013, 02:51 PM
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Default Re: Bad fuel Pressure regulator ?

ok must be something else(heard a bad FPR can cause rich running). There's no vissable leaks but there is an extremly strong smell of gas upon start up/idling. i took out my evap system but i don't think it would cause that strong a smell.
Old 03-24-2013, 09:02 PM
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Default Re: Bad fuel Pressure regulator ?

so in short my FPR is fine ? and functions as it should
Old 03-25-2013, 10:11 AM
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Default Re: Bad fuel Pressure regulator ?

is this how a FPR is supposed to function ?
Old 03-25-2013, 10:35 AM
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Default Re: Bad fuel Pressure regulator ?

As far as I know.
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