Page 3 of 7 FirstFirst 1234567 LastLast
Results 25 to 36 of 79

Thread: misfire troubles post here (Resolved Misfire Issues Only)

  1. Top | #25
    Forum Newbie
    Array hzliiintx82's Avatar
    Join Date
    Feb 2010
    Last Online
    03-14-2014 @ 03:11 PM
    Location
    Upper RGV, Texas
    Âge
    35
    Posts
    9
    Thanks
    0
    Thanked 0 Times in 0 Posts
    From the 2004 Chevrolet Cavalier Owners Manual:


    This light should come on, as a check to show you it is
    working, when the ignition is on and the engine is
    not running. If the light does not come on, have it
    repaired. This light will also come on during a
    malfunction in one of two ways:
    • Light Flashing — A misfire condition has been
    detected. A misfire increases vehicle emissions and
    may damage the emission control system on your
    vehicle. Diagnosis and service may be required.
    • Light On Steady—An emission control system
    malfunction has been detected on your vehicle.
    Diagnosis and service may be required.
    If the Light Is Flashing
    The following may prevent more serious damage to
    your vehicle:
    • Reducing vehicle speed.
    • Avoiding hard accelerations.
    • Avoiding steep uphill grades.
    • If you are towing a trailer, reduce the amount of
    cargo being hauled as soon as it is possible.
    If the light stops flashing and remains on steady, see “If
    the Light Is On Steady” following.
    If the light continues to flash, when it is safe to do so,
    stop the vehicle.
    Find a safe place to park your vehicle. Turn the key off,
    wait at least 10 seconds and restart the engine. If
    the light remains on steady, see “If the Light Is On
    Steady” following. If the light is still flashing, follow the
    previous steps, and see your dealer for service as soon
    as possible.

    If you do notice a lack of power... then it is not firing all cylinders which could be the result of 1. Low Fuel Pressure 2. Bad ICM/Coil 3. Leaky vaccum 4. Bad Spark plug(s)
    If you smell rich fuel, then there is no spark in one or more chambers which means 2 or 4... in my case, the ICM was the issue...

    http://www.ownersmanualsource.com/ma...olet-cavalier/
    Last edited by hzliiintx82; 03-03-2010 at 01:16 AM. Reason: adding link to Owners Manual
    Mr. T

  2. Top | #26
    Senior Citizen Member
    Array SchnuppeR's Avatar
    Join Date
    Apr 2006
    Last Online
    01-20-2016 @ 04:24 PM
    Location
    Illinois
    Âge
    29
    Posts
    492
    Thanks
    0
    Thanked 0 Times in 0 Posts
    I have 78k miles on mine and i have a p0300 code. Yet there are no symptoms. Its a random misfire and i FEEL nothing and i pulled the plugs they all look excellent. The ignition is only 10k miles old I'm on my 4th ICM.

  3. Top | #27
    Forum Newbie
    Array hzliiintx82's Avatar
    Join Date
    Feb 2010
    Last Online
    03-14-2014 @ 03:11 PM
    Location
    Upper RGV, Texas
    Âge
    35
    Posts
    9
    Thanks
    0
    Thanked 0 Times in 0 Posts
    4th ICM!!!!!! WOW... I'm at 122k miles and just had to replace it... The only new things on it are the ICM, Plugs, battery and one rear Hub Bearing... Car ain't that old but I do drive it like a mo fo...

    As for the p0300 code still on the dash, mine stayed on there too but stopped flashing after I put in the new ICM... I had to use a code reader to delete it since disconnecting the battery doesnt reset things these days. These new cars have some backup power so that whatever is stored on your radio and OBD doesn't reset when you disconnect the battery.
    Last edited by hzliiintx82; 03-03-2010 at 09:30 PM. Reason: just because
    Mr. T

  4. Top | #28
    Senior Citizen Member
    Array SchnuppeR's Avatar
    Join Date
    Apr 2006
    Last Online
    01-20-2016 @ 04:24 PM
    Location
    Illinois
    Âge
    29
    Posts
    492
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Ya i reset the computer and had the code cleared and keeps coming up. It was never a blinking light. I am confused because there is NO MISSFIRE. I would hear/feel it.

  5. Top | #29
    Administrator
    Array L61Turbo's Avatar
    Join Date
    Apr 2009
    Last Online
    01-19-2018 @ 06:34 PM
    Location
    Goshen, Ohio
    Âge
    27
    Posts
    2,738
    Thanks
    14
    Thanked 20 Times in 18 Posts
    Gamer IDs

    Gamertag: L61Turbo

    misfire

    i agree i mean u can feel a misfire this doesnt seem like anything wrong like i said i tried to switch out icm/coil but didnt fix anything code just threw again it flashes like 10 times then goes steady for like 30 seconds then flashes again i dont understand what it is but really i dont feel that much power loss but it climbs hills fine and when u accelerate well trust me it does fine only other thing is rpms drop to 500 when i press the clutch happens like every 10 times i press the clutch like hzliiintx82 said both are happening the light is flashing and stays on it thows po300 code and po300pd sorry i dont have the manual
    Last edited by L61Turbo; 03-04-2010 at 09:00 PM.

  6. Top | #30
    Senior Citizen Member
    Array SchnuppeR's Avatar
    Join Date
    Apr 2006
    Last Online
    01-20-2016 @ 04:24 PM
    Location
    Illinois
    Âge
    29
    Posts
    492
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Ya im lost. I replaced the coil/icm/and plugs... And the problem happened again.. Looks like im going to rewire the system.. And run a separate ground for it. UGH im soo confused. Anyone got any tips?

  7. Top | #31
    Administrator
    Array L61Turbo's Avatar
    Join Date
    Apr 2009
    Last Online
    01-19-2018 @ 06:34 PM
    Location
    Goshen, Ohio
    Âge
    27
    Posts
    2,738
    Thanks
    14
    Thanked 20 Times in 18 Posts
    Gamer IDs

    Gamertag: L61Turbo
    seriously

  8. Top | #32
    Forum Newbie
    Array hzliiintx82's Avatar
    Join Date
    Feb 2010
    Last Online
    03-14-2014 @ 03:11 PM
    Location
    Upper RGV, Texas
    Âge
    35
    Posts
    9
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Ya i reset the computer and had the code cleared and keeps coming up. It was never a blinking light. I am confused because there is NO MISSFIRE. I would hear/feel it.
    SchnuppeR Quoted Post
    If everything is running great and that code keeps coming up, then the camshaft position sensor is probably spitting that code out erroneously. Change it out, if you still get the code back, we'll have to use the black electrical tape method (like on the old school VCR's to cover the blinking "12:00") to cover the "check engine" light in the dash...
    Mr. T

  9. Top | #33
    Senior Citizen Member
    Array SchnuppeR's Avatar
    Join Date
    Apr 2006
    Last Online
    01-20-2016 @ 04:24 PM
    Location
    Illinois
    Âge
    29
    Posts
    492
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Well now the car IS misfiring on cold start up, it sounds like its got a HUGE cam in it hahaha. Well time to figure out what it is. Frustration begins

  10. Top | #34
    Crazy Moderator
    Array Cinpro's Avatar
    Join Date
    Apr 2006
    Last Online
    04-29-2016 @ 10:03 PM
    Location
    Hurricane WV
    Âge
    46
    Posts
    3,267
    Thanks
    1
    Thanked 43 Times in 43 Posts
    If everything is running great and that code keeps coming up, then the camshaft position sensor is probably spitting that code out erroneously. Change it out, if you still get the code back, we'll have to use the black electrical tape method (like on the old school VCR's to cover the blinking "12:00") to cover the "check engine" light in the dash...
    hzliiintx82 Quoted Post
    he doesn't have a cam position sensor



    .
    http://i11.photobucket.com/albums/a174/Cinpro/jokercopy2.jpg

    It's not what you buy,it's what you build!

  11. Top | #35
    Senior Citizen Member
    Array SchnuppeR's Avatar
    Join Date
    Apr 2006
    Last Online
    01-20-2016 @ 04:24 PM
    Location
    Illinois
    Âge
    29
    Posts
    492
    Thanks
    0
    Thanked 0 Times in 0 Posts
    True

  12. Top | #36
    Forum Newbie
    Array Marty03Cav's Avatar
    Join Date
    Mar 2010
    Last Online
    09-27-2010 @ 01:31 PM
    Posts
    2
    Thanks
    0
    Thanked 0 Times in 0 Posts

    03 Cavalier 2.2l ecotec misfiring

    So I've been reading the posts here regarding the misfiring of the #3 cylinder for 2.2l Ecotec Engines. I have approx. 145K miles on my 03 Cavalier "Marty" (my wife's old car - thus the name) The check engine light came on last March and I had a friend read the code and I believe it was the P0303 code that came up....it's been a while. I have been saving the money to buy the parts and I am finally ready to make the repairs. I have had the ICM (Ignition Control Module) and Coil Assembly off to check the plugs already so I am confident I can do the work myself. The #3 plug was a little gummed up , but the plugs from the other cylinders looked great. My plan now (as it has been about 6 months since my original diagnosis) is to Replace the plugs with AC Delco parts as well as replacing the boots. If that doesn't get rid of the misfire I am preparred to replace the ICM and Coil Assembly as well. My thought is to replace the Coil and use my existing ICM to see if that works...If that doesn't do it then I'll throw on the New ICM.

    Anybody have any suggestions? Does this plan of attack make sense?

Page 3 of 7 FirstFirst 1234567 LastLast

Similar Threads

  1. 2.0 Misfire HHR SS
    By ss#4 in forum 2.0 General Problems
    Replies: 13
    Last Post: 02-24-2010, 09:33 AM
  2. misfire
    By cavy0801 in forum Superchargers
    Replies: 9
    Last Post: 05-06-2009, 11:18 AM
  3. strange misfire
    By BigBlacWagon in forum 2.2 General Problems
    Replies: 4
    Last Post: 02-19-2008, 10:38 AM
  4. help misfire problem
    By cheesecake in forum 2.2 General Problems
    Replies: 11
    Last Post: 01-31-2007, 10:19 PM
  5. Can oil on the belt cause a misfire?
    By NJHK in forum 2.0 Supercharged Problems
    Replies: 18
    Last Post: 10-14-2006, 08:16 PM

Tags for this Thread

Posting Permissions

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