Cylinder 7 Injection Timing Performance - Over Retarded

Check these first

• Cylinder 7 injector late or restricted, so timing runs retarded
• A weak or intermittent cylinder 7 injector circuit
• Low fuel pressure at the cylinder 7 rail
• A sticking or dirty cylinder 7 injector
• A worn cylinder 7 injection component, like a cam or lifter

What to do next

1. Check fuel pressure at the rail feeding cylinder 7
2. Run an injector balance test on cylinder 7
3. Inspect the cylinder 7 injector connector and wiring
4. Swap the cylinder 7 injector with a known good one and recheck
5. Check cam and lifter wear if the injector tests good
6. Clear the code and retest

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