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Maintenance Manual for Chery·Windcloud Marelli EFI System
6). Instable idle speed occurs anytime
Yes Eliminate failure displayed 1 Set ignition switch in “ON”. Check with scanner No Go to next step Yes Repair or replace idle speed actuator 2 Check if idle speed actuator of idle speed stepper No Go to next step Yes Check wire harness 3 Switch on the ignition switch, and check if the No Go to next step Yes Go to step 8 4 Make engine run at idle speed, and stall cylinders No Go to next step Yes Go to next step 5 Check the injector working condition of each No Check injector and Yes Go to next step 6 Check to see if the high voltage line resistance of No Replace 7 Check if ignition coil is damaged. No Go to next step Yes Go to next step 8 Check if spark plug is in good order. No Replace spark plug Yes Go to next step 9 Connect fuel pressure gauge valve. Strap the 30# 350kPa. No Go to step 13 Yes Go to step 12 10 Provide 12V voltage directly from accumulator to No Go to next step Yes Go to next step 11 Recheck injector to see if it is working in good No Replace injector Yes Replace fuel 12 Check if fuel is deteriorated or conatians water. No Go to step 18 Yes Go to next step 13 Check if fuel pressure is lower than 350kPa. No Go to step 17 Yes Go to next step 14 Shut down fuel gauge valve. Switch on ignition No Go to step 16 15 Turn on fuel guage valve, clamp fuel return pipe Yes Replace fuel pressure regulator
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