Engine Trouble Service

Problem

Engine will not crank.

Cause

Run down battery. Starting circuit open. Starting motor jammed. Engine stuck up. Transmission not in nuetral or park.

Solution

Recharge or replace battery, jump start engine. Check dirty or loose connection, check starter safety switches. Remove starting motor and repair. Service engine. Move shift lever.

Problem

Engine cranks slowly but will not start.

Cause

Run down battery. Defective starting motor. Bad Connections in starting system.

Solution

Recharge or replace battery, jump start engine. Repair or replace starting motor. Repair, clean and tighten connections.

Problem

Engine cranks at normal speed but will not start.

Cause

Defective ignition system. Defective fuel system. Air leak into intake manifold. Engine defective. Plugged fuel filter. Restricted exhaust system.

Solution

Spark test, check ignition timing. Check fuel system components. Tighten connections or replace gasket. Check compression or leakage. Check or replace fuel filter. Clean or clear restricted exhaust system.

Problem

Engine sluggish, stumbles, lacks power, acceleration or high speed performance, hot or cold.

Cause

Defective ignition system. Defective fuel system. Restricted exhaust system. Loss of compression. Carbon build up in engine. Defective valve action. Thick engine oil. Wrong, bad or dirty fuel.

Solution

Check ignition system components. Check fuel system components. Check catalytic converter, muffler and tail pipe. Check or test compression.Service engine. Check tappet clearance, check cam lobe. Use specified engine oil. Change fuel or use recommended fuel.

Problem
Engine lacks power or high speed performance when hot only.

Cause
Engine overheats. Choke stuck. Manifold heat control valve stuck. Vapor lock.

Solution
Check cooling system. Free, repair or replace choke stuck. Free valve. Use different fuel or shield fuel line.

Injection Nozzle Service

Problem

Engine cranks normally but will not start.

Cause

Incorrect or dirty fuel. No fuel to nozzles or injection pump. Plugged fuel return line. Pump timing off. Inoperative glow plugs, incorrect starting procedure or internal engine problems.

Solution

Flush system and use correct fuel. Check return line clean. Retime pump timing.

Problem

Engine starts but stalls at idle.

Cause

Fuel low in tank. Incorrect or dirty fuel. Limited fuel to nozzles or injection pump. Restricted fuel return line. Idle incorrectly set. Pump timing off. Injection pump trouble. Internal engine problem.

Solution

Fill tank. Flush system and use correct fuel. Check for fuel to nozzles and to pump. Check return line clean. Reset idle. Retime pump timing. Install new pump.

Problem

Rougle idle, no abnormal noise or smoke.

Cause

Low idle incorrect. Injection line leaks. Restricted fuel return line. Nozzle trouble. Fuel supply pump problem. Uneven fuel distribution to nozzles. Incorrect or dirty fuel.

Solution

Adjust low idle. Fix leaks in injection line. Clear fuel return line. Check, repair or replace nozzle. Check, replace if necessary the fuel supply pump. Selective replace of nozzle until condition clears up. Flush system and use correct fuel.

Problem

Rough idle with abnormal noise and smoke.

Cause

Injection pump timing off. Nozzle trouble.

Solution

Retime injection pump timing. Check cylinders in sequence to find defective nozzle.

Problem

Idle is fine but misfires as throttle opens.

Cause

Plugged fuel filter. Injection pump timing off. Incorrect or dirty fuel.

Solution

Replace fuel filter. Retime injection pump timing. Flush system and use correct fuel.

Problem

Loss of power.

Cause

Incorrect or dirty fuel. Restricted fuel return line. Plugged fuel tank vent. Restricted fuel supply. Plugged fuel filter. Plugged nozzle. Internal engine problems or loss of compression and compression leaks.

Solution

Flush system and use correct fuel. Clear fuel return line. Clean fuel tank vent. Check fuel lines, fuel supply pump and injection pump. Replace fuel filter. Selective test nozzles and replace as necessary.

Problem

Noise rap from one or more cylinders.

Cause

Air in fuel system. Gasoline in fuel system. Air in high pressure line. Nozzle sticking open or with low opening pressure. Engine problems.

Solution

Check for cause and correct in fuel system. Replace fuel in fuel system. Bleed system in high pressure line. Replace defective nozzle.

Problem

Combustion noise with excessive black smoke.

Cause

Timing off. Injection pump trouble. Nozzle sticking open. Internal engine problems.

Solution

Rest idle timing. replace pump in injection pump. Clean or replace nozzle.