Fuel Pressure Testing Questions

[exitwound]

Installed the Lindsey Racing fuel pressure gauge last hour.

Per Clarks Garage Fuel Testing:

• Engine Stopped - Relay Jumpered 2.5 bar +/- 0.2 bar (36 psig +/- 3 psig)
• Engine Running at Idle 2 bar +/- 0.2 bar (29 psig +/- 3 psig)
• 20 Minute Leakdown Pressure 1 bar (14.5 psig)

My results:

• Relay Jumpered: 38psi
• Engine idle: 34psi
• 20-minute Leakdown: 34psi
• 40-minute Leakdown: 32psi
• 55-minute Leakdown: 26psi
• 70-minute Leakdown: 16psi

According to Clarks, the fuel rail pressure should be dropping to 1bar (~14psi) after 20 minutes. My car isn't experiencing this. What would cause this to happen and what symptoms would be exhibited by this behaviour?

I ask because I'm experiencing a rough idle when cold, an intermittant no-start when warm, and acceleration problems on inclines while warm.

New fuel filter. injectors not professionally cleaned, but o-rings and caps were replaced. No leaks in the fuel system. This is the first test done to narrow down where the fuel delivery problem seems to be.

Note: If you're following my plight, the intake was opened, cleaned, and dried. The TPS was drowning in oil and water as well as the J-boot, throttle butterfly valve, and mass airflow sensor. Oil was changed. These two issues may be connected but I am not sure how, if they are.