# Misfire on cylinder #1 **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chrysler, towncountry\ **Created:** [March 31, 2013, 9:09am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367 "2013-03-31T09:09:39Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Hawkman](https://avatars.discourse-cdn.com/v4/letter/h/e5b9ba/32.png) [@Hawkman](https://community.cartalk.com/u/Hawkman)\ **Post date:** [March 31, 2013, 9:09am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/1 "2013-03-31T09:09:39Z")
I have a 2003 Chrysler Town & Country and the check engine light is on. I brought the van to my mechanic and he told me there was a code that told him there was a misfire on cylinder #1. He started out with replacing the wire to cylinder #1, no change. He replaced the spark plug, no change. He installed a new fuel injector, no change. The van runs a little ruff at idle and when at a stop light. We are both puzzled about this and he has run out of ideas. Any help would be greatly appreciated. Thanks. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [March 31, 2013, 9:17am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/2 "2013-03-31T09:17:25Z")
Have you checked compression? Have you verified that the spark plug is firing? ---
**Author:** ![Hawkman](https://avatars.discourse-cdn.com/v4/letter/h/e5b9ba/32.png) [@Hawkman](https://community.cartalk.com/u/Hawkman)\ **Post date:** [March 31, 2013, 9:25am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/3 "2013-03-31T09:25:04Z")
Yes, he told me that the spark plug was firing. I don’t know if he did a compression check. ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [March 31, 2013, 9:29am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/4 "2013-03-31T09:29:35Z")
How many miles on the van? With the spark plug, or plugs, out a compression test should have been run just to make sure everything is fine with the engine internals. Assuming the compression is good; some possibilities could be: Faulty coil. No power provided to the injector. Problem with the ground circuit for the injector. (Ground is made through the ECM, or computer.) With the engine idling he should hear the injector faintly clicking due to the ground circuit being open and closed inside of the ECM. If it is clicking then maybe the plug needs to come back out and at least check the compression on that particular cylinder. If it is not clicking then he needs to check the injector electrical circuit. It’s not that difficult. ---
**Author:** ![knfenimore](https://avatars.discourse-cdn.com/v4/letter/k/9fc348/32.png) [@knfenimore](https://community.cartalk.com/u/knfenimore)\ **Post date:** [March 31, 2013, 6:30pm UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/5 "2013-03-31T18:30:57Z")
I would have checked the coil. An intake manifold leak can also cause this. ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [March 31, 2013, 8:01pm UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/6 "2013-03-31T20:01:20Z")
So would a burned valve. ---
**Author:** ![shannon\_darst](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shannon_darst/32/2606_2.png) [@shannon\_darst](https://community.cartalk.com/u/shannon_darst)\ **Post date:** [April 1, 2013, 6:41am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/7 "2013-04-01T06:41:21Z")
have the code deleted and see if it happens again. In my experience using my hand held code reader is that 80 percent of the time they stay off which I think is due to water in fuel, corrosion breaking free in the injectors and such. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [April 1, 2013, 8:01am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/8 "2013-04-01T08:01:57Z")
@shannondarst OP says the car is running rough OP has a misfire code Sounds to me like there is in fact a misfire How would simply clearing the code help, other than extinguishing the MIL? ---
**Author:** ![shannon\_darst](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shannon_darst/32/2606_2.png) [@shannon\_darst](https://community.cartalk.com/u/shannon_darst)\ **Post date:** [April 1, 2013, 6:25pm UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/9 "2013-04-01T18:25:55Z")
I suggested water in gas which can cause both the misfire and rough idle. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [April 2, 2013, 3:49am UTC](https://community.cartalk.com/t/misfire-on-cylinder-1/78367/10 "2013-04-02T03:49:33Z")
@shannondarst Thanks for explaining that to me. So perhaps OP went to the “wrong” filling station and got a bad tank of gas?