Troubleshooting Guide — 19 Lack of Power
F2-52flowchartTroubleshooting hints list re-uses bullet numbers 4 for three different causes (Poor ignition / Low engine compression / Alcohol-blended fuel used) as printed on the page.
19 LACK OF POWER
DESCRIPTION:
• Performance poor under load when throttle valve is fully open
• Reduced maximum speed
• Idle condition normal
NOTE
[TROUBLESHOOTING HINTS]
1. Factors other than engine malfunction
• Clutch slipping
• Brake dragging
• Low tire pressure
• Incorrect tire size
• Over-loaded
2. Low intake air amount
• Throttle valve not open fully
• Clogged intake-air system
3. Air/fuel mixture too lean
• Fuel line pressure decreases
• Fuel injection malfunction
4. Poor ignition
4. Low engine compression
4. Alcohol-blended fuel used
19 Lack of Power
1
STEP 1: Check factors other than engine: Clutch slipping; Brake dragging; Low tire pressure; Incorrect tire size
No
Repair or replace
Yes
2
Go to next step
3
STEP 2: Is throttle valve fully opened when accelerator is fully depressed?
No
Is accelerator cable correctly installed? (page F2-97) If it is, check throttle body (page F2-96). If it is not, install it correctly (page F2-97)
Yes
4
Go to next step
5
STEP 3: Is "00" displayed on SST with ignition switch ON? (page F2-73)
No
Diagnostic trouble code No. displayed — Check for cause (Refer to specified check sequence) (page F2-74)
Yes
6
"00" displayed — Go to next step
7
STEP 4: Connect System Selector to data link connector and set Test Switch to "SELF TEST"; is ignition timing at idle correct after warm-up? (page F2-70) Ignition timing (BTDC): 9—11° {10 ± 1°}
No
Adjust ignition timing (page F2-70)
Yes
8
Ignition timing advances when accelerating. If advances, go to next step. If not advances, check ECM terminal voltages (page F2-141)
9
STEP 5: Are ECM terminal voltages OK? (Especially 2F) (page F2-141)
No
Check for cause (page F2-141)
Yes
10
Go to next step