Dechoke Control System (2.3L Only) Operation; Evaporative Emission Canister Inspection; Fuel Vapor Valve Inspection; Description - Mazda B-Series 1997 Workshop Manual

EVAPORATIVE EMISSION CANISTER
lnspection
1. Remove the evaporative emission canister.
2. Visually check the evaporative emission canister for dam-
age, fuel saturation and leakage.
3. Blow through each port and verify tha.t air flows.
4. If not as specified, replace the evaporative emission can-
ister.
FUEL VAPOR VALVE
Inspection
1
.
Verify that air flows through the valve frlom port A when the
valve is held as shown in the figure.
I I
MFI 054-A
2. Verify that no air flows through the valve from port A when
-c-
the valve is held as shown in the figure.
3. If not as specified, replace the fuel vapor valve.
A
0
1
MF1055-A 4BUOF2-160
DECHOKE CONTROL SYSTEM (2.3L ONLY)
DESCRIPTION
To facilitate starting the engine when the spark plugs
become fouled, such as when the engine is flooded, fuel
injection is cut if the throttle valve is held wide open during
cranking. This allows the spark plugs to dry and purges
excess fuel from the cylinders.
4BUOF1-169
I
M F I O ~ ~ - A 6EiU0FT-222
SYSTEM OPERATION
1. Turn the ignition switch to START and verify that an injec-
tor operating sound is heard while the engine is cranking.
2.
Depress the accelerator pedal fully and turn the ignition
switch to START. Verify that no operating sound is heard
while cranking engine.
3. If an operating sound is heard, check the PCM terminal
89. (Refer to page FT-181.)