Poor DRIVEABILITY: Surging

• Check switch condition signal circuit. See CODE 51 in appropriate articles;

For GS300 TESTS W/CODES

For SC300 TESTS W/CODES

For SC400 TESTS W/CODES

• Check fuel pump control circuit. See CODE 78 in appropriate article;

For GS300 TESTS W/CODES

For SC300 TESTS W/CODES

For SC400 TESTS W/CODES

• Check distributor sensors.
• Check spark plugs.
• Check fuel injector circuit.