Cylinder 8 - Fuel Trim at Max Limit

Check these first

• A clogged injector on cylinder 8
• A vacuum leak at the cylinder 8 intake runner
• A lazy oxygen sensor reading lean
• Low fuel pressure from a weak pump
• A restricted fuel filter

What to do next

1. Read live fuel trim for cylinder 8 on a scan tool
2. Compare cylinder 8 trim against the other cylinders
3. Smoke test the intake runner for cylinder 8
4. Measure fuel pressure under load
5. Clean or replace the cylinder 8 injector if it runs lean
6. Clear the code and retest

Look up another code