TBI Models

Adjustment of fuel pressure is required after replacement of pressure regulator. Remove air inlet from throttle body. Connect a tachometer to diagnostic connector terminals D1-1 and D1-3. Connect a fuel pressure gauge to the fuel body pressure test fitting.
NOTE: Some TBI models do not have a pressure test fitting on throttle body. Use Fitting (PN 8983 501 572) for this purpose.

Fig 1: Fuel Pressure Regulator for 2.5L Models
Start engine and accelerate to approximately 2000 RPM. Turn adjustment screw to obtain 14.5 psi (1.02 kg/cm² ) fuel pressure. Location of adjustment screw in on bottom of regulator. Install a lead seal ball to cover regulator adjustment screw after adjusting fuel pressure to specification. Turn ignition off. Disconnect fuel pressure gauge. Install cap on test fitting. Install air inlet.

NOTE: To increase fuel pressure, turn adjustment screw inward. To decrease fuel pressure, turn adjustment screw outward.