# 2002 Nissan Altima Random Misfires **URL:** \ **Category:** Power/Fuel\ **Tags:** nissan, altima\ **Created:** [October 6, 2021, 9:36pm UTC](https://community.cartalk.com/t/2002-nissan-altima-random-misfires/179828 "2021-10-06T21:36:10Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![christopher.hestand\_177569](https://avatars.discourse-cdn.com/v4/letter/c/53a042/32.png) [@christopher.hestand\_177569](https://community.cartalk.com/u/christopher.hestand_177569)\ **Post date:** [October 6, 2021, 9:36pm UTC](https://community.cartalk.com/t/2002-nissan-altima-random-misfires/179828/1 "2021-10-06T21:36:10Z")
2002 Nissan Altima, 85k miles. Lately, about every few weeks, I get a misfire on cylinder 1 on a cold start. After a few seconds, it smooths itself out and operates normally. This morning, the same happened, but it was cylinder 3 instead (I use a smartphone OBD2 reader. Not sure if it matters, but the exhaust manifold/precat was replaced about 1k miles ago (to avoid the infamous pre-cat failure in this year model) This car has been great! What the heck? lol ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [October 6, 2021, 9:40pm UTC](https://community.cartalk.com/t/2002-nissan-altima-random-misfires/179828/2 "2021-10-06T21:40:51Z")
[P0300 2002 NISSAN ALTIMA SEDAN Code Cylinder Misfire Detected Random Cylinders (autocodes.com)](https://www.autocodes.com/p0300_2002_nissan_altima_sedan.html) ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [October 6, 2021, 9:42pm UTC](https://community.cartalk.com/t/2002-nissan-altima-random-misfires/179828/3 "2021-10-06T21:42:33Z")
[Misfire Due to Faulty Intake Manifold : Nissan Altima Engine (repairpal.com)](https://repairpal.com/misfire-due-to-faulty-intake-manifold-567#) ---
**Author:** ![christopher.hestand\_177569](https://avatars.discourse-cdn.com/v4/letter/c/53a042/32.png) [@christopher.hestand\_177569](https://community.cartalk.com/u/christopher.hestand_177569)\ **Post date:** [October 6, 2021, 9:45pm UTC](https://community.cartalk.com/t/2002-nissan-altima-random-misfires/179828/4 "2021-10-06T21:45:58Z")
Except it didnt throw out P0300, it threw out P0301 and then P0303 on separate days. Or does that make a difference? ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [October 6, 2021, 9:49pm UTC](https://community.cartalk.com/t/2002-nissan-altima-random-misfires/179828/5 "2021-10-06T21:49:10Z")
po301 is for cylinder 1 misfire and po303 is for cylinder 3 misfire ---
**Author:** ![christopher.hestand\_177569](https://avatars.discourse-cdn.com/v4/letter/c/53a042/32.png) [@christopher.hestand\_177569](https://community.cartalk.com/u/christopher.hestand_177569)\ **Post date:** [October 6, 2021, 9:52pm UTC](https://community.cartalk.com/t/2002-nissan-altima-random-misfires/179828/6 "2021-10-06T21:52:26Z")
Yes I realize that. I guess what I am asking is what could cause a misfire on two separate cylinders on two separate occasions? And in both cases, the car smoothes out after a few seconds and operates normally.