Table of Contents
Advertisement
924
Fuel
Mixture
20
T
ROUBLESHOOTING CIS
CONDIT
ION
Engine will not start
or is hard to start
when cold
Engine will not
start
or is hard to start when warm
Erratic idling
in
warm-up
phase
(shaking)
Erratic idling with warm
engine (shaking)
Engine not accepting fuel (backfiring)
I
Engine misfires while driving, high load
I
Engine
power
insufficient
I
Engine runs on
I
I
Fuel consumption excessive
I
I
Hesitation
I
I
I
I
CO level
at idle speed too
high
I
CO
level
at
idle speed
too low
I
Idle
speed
not
adjustable
(too
fast)
I
Engine starts,
but
stops
immediately
I
I
I
CAUSE
I
•
• • • • • •
Leak
in
vacuum system
•1
• • • • • • • •
Air sensor lever or control piston moves
hard
I
I
I•
I I
I
I
Sensor plate position
wrong
1
1
•
T.hrottle
bypass
valve
wil
l
not open
•
Throttle
bypass
valve will not close
Ill
•
I
•
Electric fuel pump not running
~
Cold start system defective
••
• • •
Cold start valve leaks
•
•
I
Fuel delivery
rate
for
control
pressure
circuit excessive
I
•• • • •
I
Control pressure "warm" (activated) too high
••
•
•
•
•
I
Control pressure "warm"
(activated)
too low
• • •
I
System pressure outside of
tole
rances
•
Fuel
system
leaks (incl. control
pressure
reducing device)
••
•• • •
Fuel injectors
leak; opening
pressure too
low
••
•• • •
I
I
Delivery
rate
not uniform (dispersion)
••I•
•• • • •
• •
Idle
basic
setting incorrect
•
Throttle will
not
open completely
•
Control pressure
red
ucing
valve malfunctions
II
Delivery rate of
fuel
pump(s) insufficient
Printed in Germany - X,
1982
Throubleshooting
C IS
25 - 01
Hide quick links:
Advertisement
Table of Contents
