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Thread: 05 z71 missing

  1. #1
    Join Date
    Nov 2010
    Posts
    10

    05 z71 missing

    A buddy of mine has a05 z71 with a 6.0 and cam it keeps miss firing we changed plugs wires and coils

  2. #2
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    use a scanner to determine which cylinder is misfiring. All of them will be showing a misfire due to the cam, however, one will be sticking out.
    when we get trucks in for diagnosing and the plugs have already been changed, 85% of the time it's a cracked plug due to incorrect installation.

  3. #3
    Join Date
    Nov 2010
    Posts
    10
    After we changed the plugs it was missfiring on 1,7,8 then we changed the wires it was just 7,8 then we changed the coils it missed on all except 2and 3

  4. #4
    Join Date
    Jul 2008
    Location
    Florida
    Posts
    147
    Try cleaning the MAF then swap injectors around to see if it changes cylinders.
    '04 Silverado RCSB with a crank bolt.

    You know your truck sounds good when cops ask you to get on it.

    Idle Clip

  5. #5
    Join Date
    Feb 2010
    Location
    Odessa, texas
    Posts
    916
    Fixed...it was a broke valve spring.
    1983 Ford Ranger- 2.3 to 205k mile 6.0 swap

  6. #6
    Join Date
    Jul 2008
    Location
    Florida
    Posts
    147
    Wouldn't have been a Comp 918 spring would it?
    '04 Silverado RCSB with a crank bolt.

    You know your truck sounds good when cops ask you to get on it.

    Idle Clip

  7. #7
    Join Date
    Feb 2010
    Location
    Odessa, texas
    Posts
    916
    No it was a prc..uf it was a 918 it prolly would have dropped the valve
    1983 Ford Ranger- 2.3 to 205k mile 6.0 swap

  8. #8
    Join Date
    Nov 2007
    Location
    THE MEAN STREETS OF OKLAHOMA
    Posts
    11,120
    Quote Originally Posted by danger_ranger83 View Post
    No it was a prc..uf it was a 918 it prolly would have dropped the valve
    Guess all prc's are junk too, better find another brand
    THEY CALL ME G.

    AZRAEL

    2017 RZR 1000 2 SEATER
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  9. #9
    Join Date
    Feb 2010
    Location
    Odessa, texas
    Posts
    916
    Quote Originally Posted by Botlfed View Post
    Guess all prc's are junk too, better find another brand
    Yea i guess so.. gotta search around the interwebz and find something that nobody has ever had a problem with...
    1983 Ford Ranger- 2.3 to 205k mile 6.0 swap

  10. #10
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    AH! What should I do about my PRCS?! lol

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


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