Thread: cylinder 1 misfire

Results 1 to 6 of 6
  1. #1 cylinder 1 misfire 
    SE Level Member
    Join Date
    Jun 2022
    Location
    San Diego
    Posts
    21
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    Hey y'all I'm getting a flashing check engine light after doing a coolant flush and I can't figure out why this would be happening? Just got this car, 04 gtp comp g with 148k miles and the coolant was very dirty so I flushed good with a hose, did an oil change and supercharger oil change while at it, along with 180tstat and took for a small drive and when I got a over like 50mph I started getting the flashing check engine so hooked the scanner up and came back as a cylinder 1 misfire...any ideas as what could have caused this? I did spill alot of coolant while trying to burp my system and also dumped a bucket of water around the radiator fill which might have drenched part of my coil pack/cylinder 1 spark plug...could this have caused the misfire somehow?? Where should I start?
    Reply With Quote  
     

  2. #2 Re: cylinder 1 misfire 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,619
    Thanks (Received)
    18
    Likes (Received)
    67
    Dislikes (Received)
    0
    Chats
    0
    Pretty sure you just described what the issue is with spilling water/coolant over the coils and #1 cylinder. Dry it all out and see what you get. And don't beat on it when the CEL is flashing as that indicates a misfire that can destroy the cat converter.
    Reply With Quote  
     

  3. #3 Re: cylinder 1 misfire 
    SE Level Member
    Join Date
    Jun 2022
    Location
    San Diego
    Posts
    21
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    Hey thanks for the reply...so I did dry it up and let sit overnight and thought it went away...went for a good drive and after about 30 miles or so, the flashing CEL came back while traveling up a small incline on the freeway...only lasted a few seconds and then went away again.. surely this can't be because I got the coil/ cylinder wet after this much time right? Any other ideas? I've ordered a coil pack to try that, and waiting on my wires to come in and will change all that and see what happens but is there anything else that comes to your mind?
    Reply With Quote  
     

  4. #4 Re: cylinder 1 misfire 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,619
    Thanks (Received)
    18
    Likes (Received)
    67
    Dislikes (Received)
    0
    Chats
    0
    take one of the other coils and flip it. see if the misfire stays on cyl 1 or moves with the coil. If it moves then you have a bad coil pack. OEM coils are best and can be sourced cheap at a JY. Also, if the plugs haven't been changed then I'd do that too along with the wires. Just stick with the stock AC Delco or NGK plug type and don't run platinum plugs on these cars as they don't get along.
    Reply With Quote  
     

  5. #5 Re: cylinder 1 misfire 
    SE Level Member
    Join Date
    Jun 2022
    Location
    San Diego
    Posts
    21
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    Gotcha I will try that while waiting for my new coil...I did order an NGK one from rockauto as I know they are usually a good brand, do you think it'll be ok for the gtp though or should I get an ac Delco/gm original instead? And as for the plugs I got some iridiums are those good to use?
    Reply With Quote  
     

  6. #6 Re: cylinder 1 misfire 
    GrandPrix Junkie
    Join Date
    Oct 2009
    Location
    St. Louis
    Posts
    4,619
    Thanks (Received)
    18
    Likes (Received)
    67
    Dislikes (Received)
    0
    Chats
    0
    iridiums are fine and are OEM IIRC.
    Reply With Quote  
     

Similar Threads

  1. Misfire on cylinder 5 only at idle Give it ANY gas and misfire goes away Help/Ideas
    By jj5428 in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 3
    Last Post: 02-11-2022, 10:01 AM
  2. Cylinder 1 Misfire PLEASE HELP
    By viking55976 in forum 3.1L V6 (LHO/LG8)
    Replies: 0
    Last Post: 12-10-2013, 08:09 PM
  3. Cylinder #3 misfire
    By Newby101 in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 19
    Last Post: 07-15-2011, 03:02 PM
  4. From misfire at cylinder 3 to a open circuit on the fuel injecter at cylinder 5
    By bbfanatic23 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 0
    Last Post: 05-01-2010, 07:49 PM
  5. Cylinder #1 misfire and random cylinder misfire
    By whodat79 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 8
    Last Post: 04-21-2010, 07:16 AM
Tags for this Thread

View Tag Cloud

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •