Table 1-64 (Continued) 85 S/N Operation Test Results Actions 11 Check if the fuel pressure is lower than 250kPa. Yes Next step No 15 12 Close the fuel gauge valve. Turn on the ignition switch again and keep the fuel pump working for 3 seconds. Check if fuel pressure can be produced. Yes Next step No 14 13 Turn on the fuel gauge valve, and block the fuel return pipe. Check if the fuel pressure is quickly produced. Yes Replace pressure regulator No Repair or replace fuel injector or fuel pipe 14 Check the fuel intake pipe for leakage or blockage. Yes Repair or replace fuel intake pipe No Replace fuel pump 15 Check if the fuel return pipe is blocked or bent.
Yes Repair or replace fuel return pipe No Replace pressure regulator 16 Check the data of the intake air manifold absolute pressure and intake air temperature sensor. Is it OK? Yes Next step No Replace sensor 17 Check the spark plug, high voltage wire, distributor, ignition coil for normal operation. No Next step No Replace or adjust 18 Does it caused by A/C system? Yes Check A/C system No Replace ECU