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docs: Add P0300 code and spark plugs pending items from Diagnosis project

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- Added P0300 diagnostic code reference to FuelPressureIssue/progress.md
- Added spark plugs pending maintenance to FuelPressureIssue/progress.md
- Added both items to main README.md Notes section for visibility
- Ensures all information from 2002-Chevy-Express-Diagnosis project is preserved
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John Loper II
2026-03-21 17:52:23 -04:00
parent 83552055f7
commit 9ec2385360
2 changed files with 19 additions and 0 deletions
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FuelPressureIssue/progress.md
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- **Parts sourcing:** Use local auto parts store with VIN lookup for correct pump and filter - **Parts sourcing:** Use local auto parts store with VIN lookup for correct pump and filter
- **Old fuel filter:** Remove old filter first to confirm it's the correct part before buying new one - **Old fuel filter:** Remove old filter first to confirm it's the correct part before buying new one
- **Quality concern:** Bought cheapest option (~$8 vs ~$15-20 for premium brands); monitor for leaks or premature failure - **Quality concern:** Bought cheapest option (~$8 vs ~$15-20 for premium brands); monitor for leaks or premature failure
---
## 🔧 Related Diagnostics & Pending Items
### Diagnostic Codes
- **P0300** - Random/Multiple Cylinder Misfire Detected
- **Context:** Code was present during crank no-start diagnosis (resolved with distributor repair)
- **Status:** Should be cleared after fuel system repair
- **Location:** Diagnosed in 2002-Chevy-Express-Diagnosis project (2026-03-20)
### Pending Maintenance
- **Spark Plugs** - Replace all 8 (matching set)
- **Urgency:** Low - can wait, not affecting current operation
- **Estimated cost:** ~$30-50
- **Status:** Awaiting fuel system repair first, then will replace plugs
- **Location:** Documented in 2002-Chevy-Express-Diagnosis project (2026-03-21)
README.md
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@@ -30,6 +30,8 @@ This repository tracks all maintenance, repairs, and issues for the 2002 Chevy E
- Check valve is working fine (good pressure retention) - Check valve is working fine (good pressure retention)
- Crankshaft position sensor (CKP) had history of issues on this vehicle - Crankshaft position sensor (CKP) had history of issues on this vehicle
- Distributor corrosion is a recurring issue (~1x/year) on this van - Distributor corrosion is a recurring issue (~1x/year) on this van
- **P0300 code** - Random misfire code from crank no-start diagnosis (2026-03-20), should clear after fuel system repair
- **Spark plugs** - All 8 need replacement (matching set), low priority, pending fuel system repair first
**Documentation:** **Documentation:**
- Each subfolder contains: README.md (issue description) + progress.md (current status) - Each subfolder contains: README.md (issue description) + progress.md (current status)