Technical Definition:

Injector / Injection Timing Control Circuit

Technical Description:

Possible Causes:

• A plugged diesel fuel filter
• An in-tank blockage
• Air in the fuel due to a cracked in-tank fuel ine above the fuel level
• Bad transfer (lift) pump
• Injection pump out of time

Possible Symptoms:

• Low power
• Crank, but no start
• Hard start
• Displays an intermittent stumble or miss
• Engine may start and then stall
• Engine may appear to drive fine but surge at idle

Injection Timing Control Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Fuel Injection Pump Gear Alignment
– Fuel Filter Restriction
– Transfer Pump Inlet Restriction
– Faulty Fuel Injection Pump

Specific Makes: