Kohler 18-26 Посібник користувача - Сторінка 14

Переглянути онлайн або завантажити pdf Посібник користувача для Двигун Kohler 18-26. Kohler 18-26 21 сторінка. Command 18-26 hp horizontal crankshaft

Друкувати сторінку

CH26 Electronic Fuel Injection (EFI)

System

The EFI system is a complete, electronically controlled

fuel management system, designed to deliver a

precisely controlled fuel flow under all operating

conditions. The electronic control unit (ECU), the

''brain'' of the system, automatically adjusts fuel

delivery and ignition timing based upon load, speed,

operating temperature, and exhaust emission levels.

The low idle speed is the only manual adjustment

possible.

The ECU continuously monitors operation of the EFI

system. If it detects a problem or fault within the

system, it will illuminate the malfunction indicator light

(MIL), which is mounted in view of the operator. This is a

signal that normal, programmed operation has been

affected, and service by an authorized Kohler Engine

Dealer is required.

Troubleshooting

If the MIL comes on, or the engine becomes hard to

start, runs roughly, or stalls at low idle speed, initial

checks should be made in the following areas:

• Make sure the fuel tank is filled with clean, fresh

gasoline, and shut-off valve (if so equipped) is

opened completely.

• Make sure fuel tank vent cap is not blocked and it

is operating properly.

• Make sure the air cleaner element and precleaner

are clean and all components are properly

secured. Clean or replace as necessary.

• Make sure the proper fuel filter is being used, and

it is clean and unobstructed. Replace filter only

with genuine Kohler parts.

• Make sure all connections to sensors, ECU, and

fuel injectors are properly secured.

• Make sure a good 12 volt battery is being used and

is fully charged.

If these checks do not correct the problem, or the MIL

remains on, further diagnosis and servicing by an

authorized Kohler Engine Dealer is necessary.

Adjustment – EFI Throttle Body

Low Idle Speed (RPM) is the only adjustment that can

be made. All other fuel calibrations are permanently

preset and controlled by the ECU. The standard low idle

speed is 1500 RPM* (+ 75 RPM).

*NOTE: The actual low idle speed depends on the

application -- refer to equipment manufacturer's

recommendations.

When an EFI engine is started cold, the ECU will briefly

set a higher (200-400 RPM) low idle speed, similar to a

fast idle. Do not attempt to perform any readjustment

during this ''warm-up'' period.

If adjustment is to be made, the engine must be at

operating temperature, air cleaner in place, and check

engine light must be off (no fault codes present).

1. Start the engine and run at half throttle for 5 to 10

minutes to warm up.

2. Place the throttle control into the ''idle'' or

''slow'' position.

3. Turn the low idle speed adjusting screw in or out

and check RPM with a tachometer. See Figure 14.

Low Idle Speed

Adjusting Screw

Throttle Body

Intake Manifold

Fuel Rail

Figure 14.