Mitsubishi 1992 3000GT, Руководство по обслуживанию

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MULTIPORT FUEL INJECTION Troubleshooting
PROBLEM SYMPTOMS TABLE (FOR YOUR INFORMATION)
Items
Starting
Idling
stability
Won’t star-l
(no initial combustion)
Fires up and dies
Hard starting
Hunting
Rough idle
Incorrect idle speed
Engine stall (Die out)
Symptom
The starter is used to crank the engine, but there is no combustion within
the cylinders, and the engine won’t start.
There is combustion within the cylinders, then the engine soon stalls.
Engine starts after cranking a while.
Engine speed doesn’t remain constant; changes at idle.
Usually, a judgement can be based upon the movement of the tachometer
pointer, and the vibration transmitted to the steering wheel, shift lever, body,
etc. This is called rough idle.
The engine doesn’t idle at the usual correct speed.
The engine stalls when the foot is taken from the accelerator pedal,
regardless of whether the vehicle is moving or not.
Engine stall (Pass out)
The engine stalls when the accelerator pedal is depressed or while it is
being used.
Hesitation, Sag “Hesitation” is the delay in response of the vehicle speed (engine speed)
that occurs when the accelerator pedal is depressed in order to accelerate
from the speed at which the vehicle is now traveling, or a temporary drop
in vehicle speed (engine rpm) during such acceleration. Serious hesitation
is called “sag”. (Refer to Fig. 1)
Poor acceleration Poor acceleration is inability to obtain an acceleration corresponding to the
degree of throttle opening, even though acceleration is smooth, or the in-
ability to reach maximum speed.
Driving
Stumble Engine rpm increase is delayed when the accelerator pedal is initially de-
pressed for acceleration from the stopped condition. (Refer to Fig. 2)
Shock The feeling of a comparatively large impact or vibration when the engine
is accelerated or decelerated.
Surge
This is slight acceleration and deceleration feel usually occurred in steady,
light throttle cruise. Most notable under hight loads.
Knocking A sharp sound like a hammer striking the cylinder walls during driving and
which adversely affects driving.
Stopping
Run-on (Dieseling) Also called dieseling, this is a continued operation of the engine after the
ignition switch is turned off.
Fig.
Hesitation
,
I’
Time
Fig. 2
Time
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