Priming Fuel System - Mazda MX-5 1990 Workshop Manual

05UOFX-131
05UOFX-132
FUEL SYSTEM
F
PRECAUTION
Fuel Pressure Release and Servicing Fuel System
Fuel in the fuel system remains under high pressure even when
the engine is not running.
a) Before disconnecting any fuel line, release the fuel pres-
sure from the fuel system to reduce the possibility of injury
or fire.
1. Start the engine.
2. Disconnect the circuit opening relay. connector.
3. After the engine stalls, turn off the ignition switch.
4. Reconnect the circuit opening relay connector.
b) Use a rag as protection from fuel spray when disconnect-
ing the hoses.
c) Plug the hoses after removal.
d) When inspecting the fuel system, use a suitable fuel pres-
sure gauge.
Caution
• Install hose clamps when securing the fuel pressure
gauge to the fuel pipe and the fuel main hose to pre-
vent fuel leakage.
Priming Fuel System
After releasing the fuel system pressure for repairs or inspec-
tion, the system must be primed to avoid excessive cranking
when first starting the engine. Follow the steps below.
1. Connect diagnosis connector terminals F/P and GND with
a jumper wire.
2. Turn the ignition switch ON for approx. 10 sec. and check
for fuel leaks.
3. Turn the ignition switch OFF and remove the jumper wire.
F-101