TOHATSU BFT115A Service Manual page 95

7. Pressure regulator inspection
Check the fuel pressure and record it (page 5-129).
Disconnect the pressure regulator control tube.
Check the fuel pressure.
Is the fuel pressure higher with the control tube disconnected?
YES – GO TO STEP 8.
NO – Faulty pressure regulator
8. Fuel injector inspection
Inspect the fuel injector (page 5-134).
Is the fuel injector normal?
YES – GO TO STEP 9.
NO – • Repair the open or short circuit fuel injector wire
• Faulty fuel injector
9. IAC valve inspection
Replace the IAC valve with a new one and start the engine.
Does engine stall?
YES – Replace the ECM with a new one and recheck.
NO – Faulty original IAC valve
TROUBLESHOOTING
4-5