Dodge Neon cylinder 2 misfire and carbon buildup issue resolved with AC spark plugs and Marvel Mystery Oil on Dodge Neon

Submitted by bible51 · Jun 23, 2025
Published by RepairPal

Problem overview

Some Dodge Neon owners report experiencing cylinder 2 misfires and carbon buildup issues that can lead to performance problems. These misfires are often triggered by faulty or worn spark plugs, which fail to ignite the fuel-air mixture properly, resulting in error codes like P0302. Many owners find that replacing their spark plugs with high-quality AC spark plugs can help ensure proper ignition and potentially resolve the misfire. Additionally, some owners utilize Marvel Mystery Oil as an effective additive to clean and lubricate engine components, which can help reduce carbon buildup in the cylinders and alleviate the misfire issue. It is crucial for owners to follow proper procedures when replacing spark plugs and using additives to optimize their vehicle's performance.

1 person reported this problem
1 comment
Schedule Repair

Dodge Neon vehicles with this problem

1 model year affected
Average mileage: 9,000 miles
(9,000 - 9,000)

Search for another problem

RepairPal Car Genius

Ask our experts about your Dodge.

RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.

 Auto Repair Expert Auto Repair Expert

Call us at 877-913-1554

Available 9am – 6pm ET Monday through Friday

Call Our Experts