Troubleshooting guide for diesel fuel injection system with Bosch distributor injection pump VE

Improper fuel (gasoline) in tank

Drain tank, flush system, fill with proper fuel

Tank empty or tank vent blocked

Fill tank/bleed system, check tank vent

Air in the fuel system

Bleed fuel system, eliminate air leaks

Pump rear support bracket loose

Replace as necessary

Voltage supply malfunction/stop solenoid defective

Correct electrical faults/replace stop solenoid

Fuel filter blocked

Replace fuel filter

Injection lines blocked/restricted

Drill to nominal I.D. or replace

Fuel supply lines blocked/restricted

Test all fuel supply lines -- flush or replace

Loose connections, injection lines leak or broken

Tighten the connection, eliminate the leak

Paraffin deposit in fuel filter

Replace filter, use Diesel Fuel no. 1

Pump-to-engine timing incorrect

Readjust timing

Injection nozzle defective

Repair or replace

Engine air filter blocked

Replace air filter element

Pre-heating system defective

Test the glow plugs, replace as necessary

Injection sequence does not correspond to firing order

Install fuel injection lines in the correct order

Low idle misadjusted

Readjust idle stop screw

Maximum speed misadjusted

Readjust maximum speed screw

Overflow fitting interchanged with inlet fitting

Install fittings in their proper positions

Overflow blocked

Clean the orifice or replace fitting

Cold-start device malfunction

Check cold-start mechanism

Low or uneven engine compression

Repair as necessary

Fuel injection pump defective or cannot be adjusted

Replace

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