Adjusting the high pressure fuel pump (Renault Espace III)

Attention: It is strongly recommended to follow the sequence of adjustments.

Adjusting Idle Speed and Idle Return

Note: These adjustments must be made on a hot engine after the radiator fan has been turned on twice.

• Make sure the idle speed lever (1. Fig. 3.15) it actually rests against the end of the idle speed adjustment screw (3).

• Loosen the residual flow limiting screw (5) by two turns.
• Turn the screw (3) to adjust the idle speed of the crankshaft engine to 725±50 min⁻¹
• Place a 1 mm thick feeler gauge between the end of the residual flow adjustment screw (5) and the load lever (2).
• By turning the residual flow limiting screw (5), set the crankshaft speed 10-20 min⁻¹ higher than the idle speed.
• Take out a 1 mm thick feeler gauge, sharply increase the engine speed several times and let it slowly return to idle.
• If necessary, use the adjusting screw to adjust the engine idle speed.
• Press and release the accelerator pedal several times, selecting the G31* mode on the Renault XR 25 instrument.

Caution: Any adjustment of the residual flow limitation screw requires rechecking using the Renault XR 25 tool.

Fast idle

Note: This adjustment must be made on a hot engine after the previous adjustments have been made.

• Manually set the idle speed (1) and fast idle speed levers to the end of the fast idle speed adjustment screw (4).
• Check that the engine crankshaft speed at fast idle speed stabilizes at 850±25 min⁻¹ and, if necessary, adjust it by turning the adjusting screw (4).

Note: To adjust the fast idle speed on vehicles equipped with air conditioning, it is sufficient to connect the pneumatic circuit to the atmosphere.

Adjusting the fast idle cable

Note: This adjustment must be made on a hot engine after the previous adjustments have been made.

• Make sure the idle speed lever rests against the end of the adjusting screw.
• Keeping the rope taut, secure it at a distance (X. Fig. 3.16) from the idle speed lever, which is respectively equal to:

- version without air conditioning system: X = 5±1 mm;

- version with air conditioning system: X = 2±1 mm.

Slow-down shock absorber

• The deceleration damper smoothly transfers the force from the accelerator pedal to the load lever.
• After the previous adjustments, it is necessary to adjust the length of the deceleration damper. Lever (1, Fig. 3.15) must rest against the adjusting screw (3).
• Using paint applied to the shock absorber body, mark the position of the top of the shock absorber.
• Press on the upper shock absorber hinge until the adjustment gap of X=2 mm is obtained (Fig. 3.16).

(The original can be found on the website: RenaultBook)