Celica L4-122 1998cc 20L DOHC Turbo (3S-GTE) (1990) Fuel Pressure Regulator Specifications
Checking Fuel Pressure With Gauge - Vacuum Hose Connected
11. If fuel pressure does not drop, replace the FPR.
12. Stop the engine and disconnect the fuel pressure gauge from the engine.
13. Reinstall the fuel inlet pipe with union bolt. Torque the union bolt to 22 ft.lbs. (29 N-m).
Tightening Fuel Inlet Union Bolt
14. Wipe off any gasoline that may have escaped when the fuel pipe was disconnected.
15. Start the engine and check the Fuel Rail for cracks or signs of fuel leakage, especially around the fuel injectors.