Honda Accord 2008 Manual page 433

07/11/02 09:04:07 61TA0000_110_0114
PGM-FI System
DTC Troubleshooting (cont'd)
8. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3
MISFIRE, and/or CYL4 MISFIRE in the DATA LIST
for 10 minutes with the HDS.
Does the CY L1 MISF IRE, CY L2 MISF IRE, CY L3
MISF IRE, and/ or CY L4 MISF IRE show misf ire
counts?
−
YES Go to step 9.
NO − Intermittent failure, the system is OK at this
time.
9. Turn the ignition switch to LOCK (0).
10. Check the fuel quality.
Is the quality good?
YES − Go to step 11.
−
NO Drain the tank and fill with a known-good fuel,
then go to step 25.
11. Inspect the spark plugs (see page 4-22). If the spark
plugs are fouled or worn, replace them.
12. Test-drive the vehicle for several minutes in the
range of these recorded freeze data parameters:
• ENGINE SPEED
• VSS
• REL TP SENSOR
• CLV (calculated load value)
• APP SENSOR
13. Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3
MISFIRE, and/or CYL4 MISFIRE in the DATA LIST
for 10 minutes with the HDS.
Does the CY L1 MISF IRE, CY L2 MISF IRE, CY L3
MISF IRE, and/ or CY L4 MISF IRE show misf ire
counts?
−
YES Go to step 14.
NO − Go to step 25.
11-114
14. Check the fuel pressure (see page 11-361).
Is the f uel pressure OK ?
YES − Go to step 15.
NO −
• If the fuel pressure is too high, replace the fuel
pressure regulator (see page 11-376), then go to
step 25.
• If the fuel pressure is too low, check the fuel
pump, the fuel feed pipe, and the fuel filter. If
they are OK, replace the fuel pressure regulator
(see page 11-376), then go to step 25.
15. Start the engine. Hold the engine speed at
3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
16. Check for these conditions:
• Engine coolant temperature (ECT SENSOR 1)
above 176 °F (80 °C)
• A/T in P or N, M/T in neutral
• All electrical loads off
17. Monitor the ENGINE SPEED in the DATA LIST with
the HDS, and hold the engine speed at 2,500 rpm.
Once the engine speed is met, hold the accelerator
pedal steady for more than 10 seconds.
Did the engine speed vary more than 100 rpm f rom
2,500 rpm?
YES − Repeat step 17.
NO − Go to step 18.
18. While holding the engine speed at 2,500 rpm, check
the MAF SENSOR in the DATA LIST with the HDS.
Is there about 5.6 7 .8 gm/ s ( M/ T ) or 6.5 −
9.1 gm/ s ( A/ T )?
−
YES Go to step 19.
NO − Replace the MAF sensor/IAT sensor (see page
11-227), then go to step 25.
19. Turn the ignition switch to LOCK (0).
−