MPI <4G9> -
Troubleshooting
13A-139
OK
Check the following items.
D
Check the ignition coil, spark plugs, spark plug cables.
D
Check the EGR control system.
D
Check the compression pressure.
D
Check the fuel filter or fuel line for clogging.
OK
Check the fuel pressure. (Refer to P.13A-78*.)
OK
1. Inspect the intake of
air into the air intake
system
D
Broken intake
manifold gasket
D
Broken vacuum
hose
D
PCV valve does
not operate.
D
Broken air intake
hose
2. Check the injector for
clog.
NG
Check the fuel pressure.
(Refer to P.13A-78*.)
OK
MUT-
II
Data list
11 Oxygen sensor
OK:
Changes between 0 - 400 mV and 600 - 1,000 mV during
idling
From the previous page
INSPECTION PROCEDURE 16
The feeling of impact or vibration when accelerating
Probable cause
In cases such as the above, the cause is probably that there is an ignition leak
accompanying the increase in the spark plug demand voltage during acceleration.
D
Malfunction of the ignition system
No
Check the following items.
D
Check the ignition coil, spark plugs, spark plug cables.
D
Check for occurrence of ignition leak.
MUT-
II
Self-Diag code
Are diagnosis codes displayed?
Yes
Refer to P.13A-90, INSPECTION CHART FOR DIAGNOSIS
CODES.
INSPECTION PROCEDURE 17
The feeling of impact or vibration when decelerating.
Probable cause
Malfunction of the ISC system is suspected.
D
Malfunction of the ISC system
OK
Clean the throttle valve area. (Refer to P.13A-22*.)
NG
Check the throttle position sensor system. (Refer to P.13A-100,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
MUT-
II
Data list
14 Throttle position sensor (Refer to P.13A-154.)
NG
Check theISC system. (Refer to P.13A-120, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
No
Check the ISC servo for operation sound. (Refer to P.13A-26*.)
MUT-
II
Self-Diag code
Are diagnosis codes displayed?
Yes
Refer to P.13A-90, INSPECTION CHART FOR DIAGNOSIS
CODES.
NOTE:
*: Refer to the 2000 COLT/LANCER Workshop Manual (Pub. No. PWME9511-B).