Index Nissan Nissan PULSAR N13 Series / ASTRA LD Series (1.6 and 1.8 Liter) 1987 – 1991 year - Service Manual
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Fuel and Engine Management
93
liter engines, or the throttle body hose fitting on 1.6
(5) Tighten all connectors securely. Check for external leaks as previously described. (6) Start the engine and note the pressure while the engine is idling. (7) Switch the engine Off and check that the residual pressure does not decrease. If the fuel pressure is within Specifications and does not decrease, the fuel system is in a serviceable
If the fuel pressure is above Specifications proceed to operation (9).
If the fuel pressure is below Specifications proceed to the following operation.
If the fuel pressure decreases, an internal leak is indicated. Proceed to the following heading and carry
Testing the fuel system pressure using a pressure gauge. 1.8 liter engine. NOTE: There may be a small initial de-
(8) If the fuel pressure is below Specifications proceed as follows:
(a) Check the fuel lines for blockages and kinks or a blocked fuel filter or fuel pump pickup strainer. (b) If no fault can be found in the previous checks, on 1.8 liter engines clamp the fuel return hose On 1.6 liter engines, clamp the hose that is connected to the front throttle body hose fitting.
(c) Connect a jumper lead between terminals G and H on the diagnostic link connector and switch the
NOTE: Do not operate the fuel pump for
If the fuel pressure is less than 270 kPa on 1.8 liter engines or 90 kPa on 1.6 liter engines, renew the fuel
If the fuel pressure is more than previously specified, renew the pressure regulator assembly on
(9) If the fuel pressure in operation (6) is above Specifications, proceed as follows:
(a) On 1.8 liter engines, disconnect the fuel return hose from the pressure regulator outlet.
On 1.6 liter engines, disconnect the fuel return hose from the front throttle body hose fitting.
(b) Connect a suitable length of fuel hose to the pressure regulator or the front throttle body hose (c) Connect a jumper lead between terminals G and H on the diagnostic link connector and switch the If the fuel pressure is 230-270 kPa on 1.8 liter engines or 62-90 kPa on 1.6 liter engines, locate and
If the fuel pressure is more than previously specified, renew the pressure regulator assembly on
TO TEST FOR INTERNAL FUEL LEAKAGE
Check the residual fuel pressure as previously described.
If the pressure has decreased it is an indication of an internal leak. With the pressure gauge still at-
(1) Switch the ignition On to pressurize the fuel system. (2) As the pressure begins to decrease clamp the fuel supply hose shut. If the pressure remains steady (3) If the pressure continues to decrease switch the ignition On after it has been Off at least 10 If the pressure remain steady on 1.8 liter engines, renew the pressure regulator. If the pressure continues
If the pressure remains steady on 1.6 liter engines, renew the pressure regulator diaphragm as described
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