Kohler — Fuel Injector Leakage Test
Testing & diagnosis · Fuel injectors
From a Kohler service manual covering: ECV850, ECV860, ECV870, ECV880. Check it applies to your exact model before use.
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Before you start
- Fuel system ALWAYS remains under HIGH PRESSURE.
- Do not turn switch to START position.
- Use new O-rings and retaining clips any time an injector is removed.
Procedure
- Remove manifold mounting bolts and separate throttle body/manifold from engine, leaving TPS, high pressure fuel line, injectors and fuel line connections intact.
- Discard old gaskets.
- Position manifold assembly over a container to capture fuel and turn key switch ON to pressurize system.
- If injector shows leakage of more than two to four drops per minute from tip, turn ignition OFF and replace injector.
- Depressurize fuel system.
- Clean dirt from sealing/mounting area and disconnect electrical connector(s).
- Pull retaining clip off top of injector and remove screw holding injector to manifold.
- Install new injector(s) with new O-rings and retaining clips; lubricate O-rings lightly with clean engine oil.
Specs & values
- Torque screw securing fuel injector caps to 7.3 N·m (65 in. lb.)
- Injector resistance 11-13 FridayParts $27.79 Ω
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.