# Dodge Neon oil in spark plug tube missfire **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [October 10, 2019, 1:05am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405 "2019-10-10T01:05:11Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![knocksensor](https://avatars.discourse-cdn.com/v4/letter/k/97f17d/32.png) [@knocksensor](https://community.cartalk.com/u/knocksensor)\ **Post date:** [October 10, 2019, 1:05am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/1 "2019-10-10T01:05:11Z")
I have a 2005 Dodge neon sxt. Have a po304 code. started to change plugs and wires when I got to the 4th it had oil inside the sparkplug tube. It was lose and oil got in because of that. The valve cover gasket looks like new and no sign of oil outside of the valve cover. I sealed up the tube, it has not leaked yet after 25 miles. It is running better but still had a miss. Could it be the coil? It was oil that caused the miss in the first place now that is fixed why is it still missing even if it misses less? ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [October 10, 2019, 1:18am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/2 "2019-10-10T01:18:33Z")
Remove the spark plugs. How does number 4 look compared to the others? If number 4 looks different, replace all four. Double check the area where the number 4 spark plug seats, as it might be damaged or full of carbon deposits due to the loose plug. It’s also possible the threads in the cylinder head got damaged due to the loose spark plug. If all that doesn’t fix the misfire, swap the coils around to determine if the misfire follows a faulty coil. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 10, 2019, 1:26am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/3 "2019-10-10T01:26:49Z")
Replace the ignition coil/module. High resistance between the plug wire/plug can over-drive the coil/module. Tester ---
**Author:** ![Drkrachel](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/drkrachel/32/17826_2.png) [@Drkrachel](https://community.cartalk.com/u/Drkrachel)\ **Post date:** [October 10, 2019, 1:52am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/4 "2019-10-10T01:52:37Z")
You should go ahead and replace the gasket and the plugs. The gaskets on those engines tend to leak at the rings around the plugs first before elsewhere. It is important to put RTV sealant at the corners where the cam and camshaft sensor are. You will likely find the gap on the plugs if off at this point as well. ---
**Author:** ![knocksensor](https://avatars.discourse-cdn.com/v4/letter/k/97f17d/32.png) [@knocksensor](https://community.cartalk.com/u/knocksensor)\ **Post date:** [October 10, 2019, 2:01am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/5 "2019-10-10T02:01:53Z")
the spark plug was never lose. the tube was lose. the plug conection is good and tight no problem there. by swaping do you mean simply turning it so if its a coil it would come up as a po301? ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [October 10, 2019, 2:17am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/6 "2019-10-10T02:17:25Z")
Swap the coil that’s currently being used on number 4 with another cylinder’s coil. If the misfire swaps to the other cylinder, you know it’s probably a faulty coil. If the misfire stays on number 4 then it is something to do with cylinder number 4, bad compression, fuel injector problem, air leak, the trigger signal from the ecm that fires the number 4 coil, etc. No experience w/Neon here so don’t know if doing this swap is actually possible or not. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [October 10, 2019, 2:19am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/7 "2019-10-10T02:19:59Z")
> [@George\_San\_Jose1](#): > > Swap the coil that’s currently being used on number 4 with another cylinder’s coil. > **[2005 DODGE NEON 2.0L L4 Ignition Coil | RockAuto](https://www.rockauto.com/en/catalog/dodge,2005,neon,2.0l+l4,1430759,ignition,ignition+coil,7060)** > > RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog. Tester ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [October 10, 2019, 2:36am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/8 "2019-10-10T02:36:56Z")
I see. It appears the coil ass’y is a single unit for all four coils. While there might be a theoretical way to hack a coil-swap experiment, the only practical way appears to be to simply replace the entire 4-coil unit. ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [October 10, 2019, 4:00am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/9 "2019-10-10T04:00:30Z")
Do you know the spark plugs on a Neon are supposed to be changed every 30,000 miles and the wires every 60,000? ---
**Author:** ![knocksensor](https://avatars.discourse-cdn.com/v4/letter/k/97f17d/32.png) [@knocksensor](https://community.cartalk.com/u/knocksensor)\ **Post date:** [October 11, 2019, 2:04am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/10 "2019-10-11T02:04:58Z")
Changed the coil, works perfect. Thanks guys. ---
**Author:** ![knocksensor](https://avatars.discourse-cdn.com/v4/letter/k/97f17d/32.png) [@knocksensor](https://community.cartalk.com/u/knocksensor)\ **Post date:** [October 11, 2019, 2:12am UTC](https://community.cartalk.com/t/dodge-neon-oil-in-spark-plug-tube-missfire/150405/11 "2019-10-11T02:12:21Z")
I see what you mean about the spark plug ring gaskets. But the ring was lose, do these gaskets keep it from getting lose also?