Mazda B-Series 1997 Workshop Manual page 407

FT
TROUBLESHOOTING GUIDE
STEP INSPECTION
7 Perform Fuel Pressure Hold Inspection.
1
Yes
ACTION
Go to next step
Does fuel l~ne pressure hold?
u *
page FT-150
Disconnect inertia fuel shutoff switch connector.
Injection flow rate
PCM
If resistance is not OK, check for open in injector
circuit
.
No
Crank engine for 5 seconds. Does pressure drop
more than 34 kPa C0.35 kgflcm2, 5 psi) by the end
of 5 second crank cycle?
high-tension lead while cranking engine?
If OK, go to next step
If not OK, clean or replace spark plugs
-
-
High-tension leads
Crankshaft position sensor
Camshaft position sensor
MF1477-F2 6BUOFT-029
Check pressure regulator diaphragm
-
page FT-154
-1
Yes
If OK, check injector
-
page FT-155
If not OK, replace pressure regulator
Go to next steo
!
No
Check resistance of injector(s) at PCM connector
If resistance is OK, check as follows:
Injector drive signal