Results 1 to 9 of 9

missfire when motor is cold?

This is a discussion on missfire when motor is cold? within the General Help forums, part of the LSx Technical Help Section category; my car hit 118,000 miles and now i get a misfire when the motor is cold. i changed the fuel ...

  1. #1
    Junior Member
    Join Date
    Apr 2007
    Location
    deer park tx
    Posts
    2

    red
    00 camaro

    missfire when motor is cold?

    my car hit 118,000 miles and now i get a misfire when the motor is cold.
    i changed the fuel filter/i have 58psi pressure.
    when i start the car cold i drive maybe a minute then it starts missing like crazy, ses light starts blinking and then after like a minute of missing it just clears up everytime and drives like normal?
    gonna change the plugs tomorrow but that shouldn/t be it cause it would miss all the time.

  2. #2
    Veteran 0rion's Avatar
    Join Date
    Aug 2005
    Location
    ohio
    Posts
    22,468

    98 Formula
    06 duramax

    have you gotten the codes checked on it?

  3. #3
    Junior Member 70RScamaro's Avatar
    Join Date
    Apr 2007
    Location
    Bellingham , WA
    Posts
    19

    89 porche Red
    1970 Camaro RallySport

    yeah have ur code or codes checked it should narrow it down to a cylinder for u. plugs might be the problem only if there really old, wires is a possibility but dont throw parts at it. check for good spark on all cylinders, check the plug gap on plugs and look at there condition if they are wet it could be fuel or oil, fuel will evaporate in mins but the oil will stay. another possibiliy is ur fuel injectors can be dirty or plugged , 2 options cheap injector cleaner or have them flow bench tested at a shop. the bottle cleaner isnt gonna do anything . last but not least compresion check if nothing above helps posiblity that u have a burned valve or a cracked head . but u say that it clears up so most likey not the case , im thinking ur ignition sytem if its an intermitten problem

    hope this helps

  4. #4
    Junior Member prietodogg's Avatar
    Join Date
    Dec 2006
    Location
    San benito
    Age
    37
    Posts
    59

    Black
    2002 Camaro SS

    check your oxygen sensors I just had a problem with mine, the SES light would blink but it was because my plugs were all black due to a bad O2 sensor. Bought a new O2 got rid of the SES

  5. #5
    Impounded
    Join Date
    Feb 2007
    Location
    Pa
    Posts
    276

    Red
    99 TA

    worn valve seals

  6. #6
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006
    Location
    The great red state of MD.
    Posts
    5,753

    Black
    2001 Trans Am (sold)

    My guess would be an intake gasket leak letting unmetered air in. Would go away when things expand.

  7. #7
    Impounded
    Join Date
    Feb 2007
    Location
    Pa
    Posts
    276

    Red
    99 TA

    worn valve seals

  8. #8
    Junior Member
    Join Date
    Apr 2007
    Location
    deer park tx
    Posts
    2

    red
    00 camaro

    code said cyl # 6
    i repaced the o2's and it got alot better
    now it will only do it when the engine is warm and i shut it off and start it back up. now it only lasts about 5-10 seconds and at very light throttle positions.
    doesnt set off the ses light anymore but it still missfires a little then clears right up and i can drive like normal

    im gonna check it out a little more tomorrow and change the plugs

    thanks for the replys guys

  9. #9
    Impounded
    Join Date
    Feb 2007
    Location
    Pa
    Posts
    276

    Red
    99 TA

    check the valve seals!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. I'm Tired of the COLD......
    By HUGGER ORANGE SS in forum Rocky Mountain Members
    Replies: 35
    Last Post: 04-13-2007, 07:18 AM
  2. Cold air induction
    By TheZ in forum General Help
    Replies: 8
    Last Post: 04-06-2007, 09:46 PM
  3. Cold Start problems?
    By SteveCZ28 in forum General Help
    Replies: 3
    Last Post: 12-16-2006, 06:54 AM
  4. Any1 elses car run lousy in the cold?
    By beanie in forum General Help
    Replies: 16
    Last Post: 12-06-2006, 04:13 PM
  5. Replies: 9
    Last Post: 02-01-2006, 11:00 AM

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
  •