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Discussion Starter · #1 ·
I have an 07 2.0T SS and I did a fuel pressure test. An immediate test came to 35 PSI. What should normal PSI be at? I’m sure 35 is too low. Fuel filter? Pump? I already replaced the regulator.
 

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Normal from WIS is 3 bar ±0.1 bar so 43.5 psi ±1.5 psi. Note that reading will also be ± any gauge inaccuracy. Fuel filter is built into pump assembly.
 

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How you checked pressure?
Engine stop, ignition ON? Engine idling? Full revs?
 

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Discussion Starter · #7 ·
You are on the slightly low side of spec? Any drivability issues? If not, I wouldn’t worry about it
Yeah. I think I also have the valve issue. Idle and starting are rough. Between like 2000-1300 RPM or so when I’m slowing down only in 3rd gear the car slight changes idle and shakes.
 

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Change fuel pressure valve first. It is cheap and easy to change.
Cold starting*
I have valve issue and car shakes in cold start. Shaking reduces after 30 sec - 1 min in idle and/or when you start to drive. It disappears when engine warms even a little. In my case no more shaking after 1 km drive.
No issues when slowing down.
 

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Discussion Starter · #11 ·
Change fuel pressure valve first. It is cheap and easy to change.

I have valve issue and car shakes in cold start. Shaking reduces after 30 sec - 1 min in idle and/or when you start to drive. It disappears when engine warms even a little. In my case no more shaking after 1 km drive.
No issues when slowing down.
The fuel pressure regulator? I already did. Or you mean the sensor?
 
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