# 1998 Buick LeSabre P0300 **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** lesabre, buick\ **Created:** [October 13, 2018, 7:10pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692 "2018-10-13T19:10:37Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![RichardRBennett](https://avatars.discourse-cdn.com/v4/letter/r/d26b3c/32.png) [@RichardRBennett](https://community.cartalk.com/u/RichardRBennett)\ **Post date:** [October 13, 2018, 7:10pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/1 "2018-10-13T19:10:38Z")
Fault code P0300. Random misfire detected. Never had this problem. 95,000 miles. need some help. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [October 13, 2018, 7:48pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/2 "2018-10-13T19:48:51Z")
3800 V6 engine, coil packs need replacing, most likely. Change the spark plugs and wires first to see if it goes away. ---
**Author:** ![RichardRBennett](https://avatars.discourse-cdn.com/v4/letter/r/d26b3c/32.png) [@RichardRBennett](https://community.cartalk.com/u/RichardRBennett)\ **Post date:** [October 15, 2018, 2:04pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/3 "2018-10-15T14:04:43Z")
Thank you very much for responding. ---
**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 15, 2018, 3:31pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/4 "2018-10-15T15:31:22Z")
Don’t replace the coil packs. If there were a bad coil pack it would cause a major misfire code. Just replace the plugs and wires. Tester ---
**Author:** ![FRANKM](https://avatars.discourse-cdn.com/v4/letter/f/2bfe46/32.png) [@FRANKM](https://community.cartalk.com/u/FRANKM)\ **Post date:** [October 15, 2018, 8:38pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/5 "2018-10-15T20:38:48Z")
Before you replace plugs and coil packs, Check for a cracked plug wire. Maybe rubbing on something causing an intermittent arc. Spray some water on the ignition while the motor is running. That should show you where the fault is. Mustangman , I agree. ---
**Author:** ![RichardRBennett](https://avatars.discourse-cdn.com/v4/letter/r/d26b3c/32.png) [@RichardRBennett](https://community.cartalk.com/u/RichardRBennett)\ **Post date:** [October 16, 2018, 1:37pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/6 "2018-10-16T13:37:57Z")
I will check this out Thanks. ---
**Author:** ![lesabre](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/lesabre/32/17221_2.png) [@lesabre](https://community.cartalk.com/u/lesabre)\ **Post date:** [October 16, 2018, 9:16pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/7 "2018-10-16T21:16:33Z")
**\_i HAD THE SAME PROBLEM SO THE FIRST THING i DID IS CHECK WITH A CODER WHICH CYLINDER WAS MISFIRING THEN WENT TO THAT COIL REMOVED THE WIRE AND CLEANED ALL AROUND THE COIL TOWER AND COIL ITSELF WITH A LITTLE BRUSH AND SOME RUBBING ALCOHOL THEN CLEANED THE WIRE WITH A RAG AND ALCOHOL AND PULLED THE WIRE OFF THE SPARK PLUG CLEANED THE PLUG END AND THE INSIDE OF THE BOOT WITH A CU-TIP AND SOME ALCOHOL. THEN PUT IT BACK WITH DIELECTRIC SPARK PLUG BOOT GREASE $1.00 IN AUTO ZONE . RUNS LIKE NEW GOING ON 5 MONTHS . \_** ---
**Author:** ![RichardRBennett](https://avatars.discourse-cdn.com/v4/letter/r/d26b3c/32.png) [@RichardRBennett](https://community.cartalk.com/u/RichardRBennett)\ **Post date:** [October 17, 2018, 1:27pm UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/8 "2018-10-17T13:27:21Z")
Thanks I will try it. ---
**Author:** ![lesabre](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/lesabre/32/17221_2.png) [@lesabre](https://community.cartalk.com/u/lesabre)\ **Post date:** [October 22, 2018, 7:50am UTC](https://community.cartalk.com/t/1998-buick-lesabre-p0300/126692/9 "2018-10-22T07:50:49Z")
**_good luck , or else its a coil or spark plug going bad_** ![Capture](https://global.discourse-cdn.com/cartalk/original/2X/a/a3829ce64ce423140961519ad860f1b91866666a.jpeg)