TOHATSU BFT75A Service Manual page 118

dummyhead dummyhead
6. Pressure regulator inspection
Check the fuel pressure and record it (page 5-97)
Disconnect the pressure regulator vacuum tube.
Check the fuel pressure.
Is the fuel pressure higher with the vacuum tube disconnected?
YES
NO
7. Fuel injector inspection
Inspect the fuel injector (page 5-103).
Is the fuel injector normal?
YES
NO
8. Ignition system inspection
Check the ignition system (page 8-3).
Is the ignition system normal?
YES
NO
9. IAC valve inspection
Replace the IAC valve with a new one and start the engine.
Engine stopped?
YES
NO
– GO TO STEP 7.
– • Clogged pressure regulator vacuum tube
• Faulty pressure regulator
– GO TO STEP 8.
– • Repair the open or short circuit in the fuel injector wire
• Faulty fuel injector
– GO TO STEP 9.
– Faulty ignition system.
– Replace the ECM with a new one and recheck.
– Faulty original IAC valve.
TROUBLESHOOTING
4-5