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Toyota 1HD-FTE Troubleshooting
| Engine starts hard or will not start |
Clogged fuel filter - Clean the filter or install new filter element.
Air in fuel system - Bleed fuel system.
Clogged or defective injection nozzles - Install a new kit of correctly balanced nozzles.
Fuel injection pump malfunction - Replacement or repair required.
Wrong valve timing - Set the valve timing correctly.
Restricted fuel pipes - Service or replace fuel pipes.
Improper injection timing - Use correct injection timing adjustment.
Piston rings and cylinder are worn - Change defective components.
| Engine starts but stalls immediately |
Fuel filter element clogging - Replace filter element.
Fuel injection pump damage - Repair or replace injection pump.
Clogged air cleaner - Change air filter element.
Improper nozzle opening pressure - Adjust as required.
| Engine stalls during operation |
Fuel injection timing is not adjusted - Set the fuel pump timing correctly.
Dirty fuel filter - Service the filter.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Defective or stuck injection nozzles - Clean or replace injection nozzles.
| Engine stalls at idle |
Incorrect low idle setting - Normalize low idle speed.
The valve clearance is not adjusted - Adjust valve clearance.
Fuel injection pump is damaged - Rebuild or replace pump.
| Engine power is too low |
Defective injection nozzle - If necessary, replace with a new nozzle.
Dirty fuel hoses or lines - Clean fuel lines and hoses.
Air filter is dirty - Air filter maintenance required.
Cylinder head gasket is defective - Replace the gasket as required.
Injection timing is out of adjustment - Use correct injection timing adjustment.
Fuel injection pump is defective - Repair or replace injection pump.
Any of moving engine components is faulty - Repair or replace defective parts.
| Engine overheating |
Clogged radiator core or damaged radiator cap - Change cap or clean radiator.
Low engine coolant - Add coolant and check the components of cooling system.
Loose or defective fan belt - If necessary, replace the belt.
Engine oil level low - Fill the crankcase with engine oil.
Cylinder head gasket is worn - Cylinder-head gasket replacement required.
Incorrect injection timing - Use correct injection timing adjustment.
| Oil pressure too low |
Engine oil insufficient - Add oil as required.
Worn oil pump - Inspect and change as required.
Oil filter clogging - Service or replace engine oil filter.
Relief valve is stuck or worn - Change or clean relief valve.
Clearance of crankshaft bearing is excessive - Check and change or repair defective parts.
Excessive oil clearance of crankpin bearing - Test and repair or replace worn parts.
| Engine oil consumption is too high |
Oil leakage: Gaskets or seals may be damaged - Change worn parts according to specifications.
Incorrect oil viscosity - Fill up with the proper oil viscosity.
Worn or stuck piston rings - Replace piston rings.
Worn valve guides and valve stems - Change the valves.
Pistons or cylinder liners are worn - Check liners and pistons, install new components as required.
| Engine noise or knocking |
Engine is not warmed up to the required temperature - Engine is not warmed up to the required temperature.
Engine oil level low - Add oil to the engine crankcase.
Improper fuel injection timing - Adjust according to specifications.
Pistons are worn or scored - Have pistons replaced.
Connecting rod failure or misalignment - Connecting rod needs to be aligned or changed.
| Starter cranks slow |
Battery voltage is low - Recharge the battery.
Battery won’t hold charge - Service charging system or install new battery.
Battery terminals are corroded or wires are disconnected - Check wiring and clean or replace terminals.
| Starter will not crank |
Battery is drained or defective - Change or recharge battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery capacity - Low battery charging, charge as required.
Damaged starter motor - Starter needs to be changed.
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