Bank 1 fuel mixture is too lean under higher load.
SYMPTOMS
- Check-engine light
- Hesitation
- Power loss under load
LIKELY CAUSES
- Low fuel pressure/volume
- Weak fuel pump
- Dirty MAF
- Intake leak
DIAGNOSIS STEPS
- Read fuel trims under load
- Check fuel pressure under load
- Inspect MAF and intake
RELATED PARTS
- Fuel pump
- MAF sensor