Hey guys. After changing all the spark plugs, specifically 1, 3, and 5, I encountered an issue where the van would randomly die while driving and then refuse to restart. Using starter fluid, I managed to get it going again. We replaced the starter, but the problem persisted. Now, with new spark plugs, the van runs beautifully, especially when going uphill—no loss of power at all. We also added some HEET to clean the fuel tank. However, it’s now throwing codes, and in California, it won’t pass smog with the check engine light on. Any help or suggestions?
Check for loose connections or faulty sensors. Clear the codes and see if they return. Ensure all parts are correctly installed.
Your Kia Sedona might be showing code P1400 due to bad spark plug boots. Replacing the spark plugs and boots could help resolve this issue. These boots can cause lean and rich fuel mixture codes. Consult a mechanic for further diagnosis if problems persist.
The codes it’s throwing might provide some clues. Have them checked by a mechanic with a diagnostic tool. They can pinpoint the exact problem and recommend the necessary repairs.
It’s also possible that the issue is related to the fuel system. Consider having the fuel injectors cleaned or replaced. This can help ensure the engine is receiving a proper fuel supply.
With further troubleshooting and potential repairs, you should be able to get your van running smoothly and passing smog.