Honda CB900F 919 (2001) [426/432] Troubleshooting

Honda CB900F 919 (2001) [426/432] Troubleshooting
21. TROUBLESHOOTING
ENGINE DOES
NOT
START OR IS
HARD TO START
ENGINE LACKS POWER
POOR PERFORMANCE AT LOW
AND
IDLE SPEED
21-1
21-2
21·3
POOR PERFORMANCE AT HIGH
SPEED
POOR HANDLING
21-4
21-4
ENGINE DOES
NOT
START OR IS HARD TO START
Possible cause
1. Check for
ope
ratio
n
of
the
fuel pu
mp
--
- - - -
A
b
n
o
r
m
a
l
-
----
~
..
~
Faulty fuel pump (Section 5)
I
N
orm
al
t
2. Inspect th e fuel flow
--
- - -
------
- Abnorma
l-
-
----c
..
~
Faulty pressure regulator
I
(Section
5)
No rma l
t
3. Inspect the fuel inje
ctor
- - -
--
- - -
--
- Abnormal
------c
..~ See sect
ion
5
I
Normal
t
4. P
erfor
m a spark test -
----
--
---
--
Weak or no spark
I
Goo
d spark
--
.....
~
Fa
ult
y spark
plu
g
Fouled spark plug
Faulty ECM
Broken or sh
ort
ed spark plug
wi
re
F
ault
y
igni
tion
switch
Faulty
igni
tion
pulse gener
ator
Faulty engine
stop
sw
itch
Loose or disconnected ignition
system w ires
--
.....
~
Imp
rope
r choke
ope
ration
Intake
pipe
leak
ing
Imprope
r ignition
timi
ng
(Fau
lty
ig
nit
ion co il
or
ignition
pulse generator)
K:!1
Fuel contaminated
u.I
5. Test cylinder compression
----
-----
- Low compression
-
-
-J
"
~
. Valve stuck open
I Wo rn cylinder and piston rin g
Compression norm al Damaged cylin
der
head gasket
!
~
~
~
~:p
~
~
I
::l
v
e
timing
6. Start
ing
follow ing no
rma
l
proce
du re - - -
---
Engine starts but
I
~~
Engine does n
ot
start
1
7. Remove and inspect spark plug - -
-----
- Wet
plu
g -
----
->
..
~
. Choke close d
Th rottl e valve open
Clogged air cleaner
21-1

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