+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 20

Thread: backfire and miss

  1. 03-26-2009 11:34 AM #1
    lo-lyf's Avatar
    lo-lyf
    lo-lyf is offline niiiice doggy.......
    Join Date
    Mar 2009
    Location
    Wichita Falls, TX
    Posts
    2,172

    backfire and miss

    Last Saturday night when I kinda got on the throttle, my truck backfired and started missing for a few seconds. It started running normal again after that, I let into a little bit again and the same problem. I was about 2 blocks from my house and I took it easy on home and parked it for the night. I went out the next morning and set the old Diablosport back to factory and it ran fine from then on. Later that night though the SES light came on. I hooked my reader up to it and it gave me a igniton coil b malfunction. cleared the code and all is well since. Yesterday I had the cats taken off and one was clogged up. When I got back to work I installed the Nelson and truck runs like a scalded arsed ape. I am assuming the clogged cat was causing the backfire and miss?
    2005 black Yukon XL SLT - traded in for me wife's new Fusion (GM sucks these days)
    2002 black Yukon SLT (the skinny sister)
    1969 green Pontiac GTO (Layla, AKA the black sheep)

    INSTALLS AND MORE.. http://www.ls1truck.com/forums/my-ga...-low-life.html
    Sticky/broken gauges? I can help. PM me for details.
    Reply With Quote Reply With Quote
  2. 03-26-2009 11:35 AM #2
    GasGuzzler's Avatar
    GasGuzzler
    GasGuzzler is offline Pants on the ground
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Need the code number. It's unlikely the cats caused a coil code.
    Reply With Quote Reply With Quote
  3. 03-26-2009 11:38 AM #3
    lo-lyf's Avatar
    lo-lyf
    lo-lyf is offline niiiice doggy.......
    Join Date
    Mar 2009
    Location
    Wichita Falls, TX
    Posts
    2,172
    it didnt give me a number, it was read from the diablo tuner. I checked to see if all of the coils are sparking and they are. The truck doesn't currently have any DTC's so I figure all is well. I just want to make sure since I have kinda hammered on her after I got the new tune.
    2005 black Yukon XL SLT - traded in for me wife's new Fusion (GM sucks these days)
    2002 black Yukon SLT (the skinny sister)
    1969 green Pontiac GTO (Layla, AKA the black sheep)

    INSTALLS AND MORE.. http://www.ls1truck.com/forums/my-ga...-low-life.html
    Sticky/broken gauges? I can help. PM me for details.
    Reply With Quote Reply With Quote
  4. 03-26-2009 11:45 AM #4
    lo-lyf's Avatar
    lo-lyf
    lo-lyf is offline niiiice doggy.......
    Join Date
    Mar 2009
    Location
    Wichita Falls, TX
    Posts
    2,172
    Also, I was playing with the spark, power enrichment, etc. etc. on that diablo waste of space that morning. I hope I didn't mess anything up since I had no idea what I was doing. I have a bad problem with that, doing things I shouldnt be.
    2005 black Yukon XL SLT - traded in for me wife's new Fusion (GM sucks these days)
    2002 black Yukon SLT (the skinny sister)
    1969 green Pontiac GTO (Layla, AKA the black sheep)

    INSTALLS AND MORE.. http://www.ls1truck.com/forums/my-ga...-low-life.html
    Sticky/broken gauges? I can help. PM me for details.
    Reply With Quote Reply With Quote
  5. 03-26-2009 12:06 PM #5
    farmtruc's Avatar
    farmtruc
    farmtruc is offline Senior Member
    Send a message via AIM to farmtruc
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    IF the issue doesn't come back, don't worry about it, it was probably the handheld, I've see it before.
    Nelson Performance
    FastestTruckList.com
    NP on Facebook
    Youtube Channel
    '94 Chevy Truck: 8.9 et, 408 twins
    Reply With Quote Reply With Quote
  6. 03-26-2009 12:12 PM #6
    lo-lyf's Avatar
    lo-lyf
    lo-lyf is offline niiiice doggy.......
    Join Date
    Mar 2009
    Location
    Wichita Falls, TX
    Posts
    2,172
    Quote Originally Posted by farmtruc View Post
    IF the issue doesn't come back, don't worry about it, it was probably the handheld, I've see it before.
    cool, I was thinkin it was just my rookieness mixed with a dash of wrong tune. I'm very impressed with the tune you sent me BTW. I also hear it takes a couple hundred miles for everything to really set in. Can't wait to see how much better it can get. as far as plugs, I have 75,000 on the ODO, what plugs would be best? NGK, AC Delco, what? I should use iridium core too right?
    2005 black Yukon XL SLT - traded in for me wife's new Fusion (GM sucks these days)
    2002 black Yukon SLT (the skinny sister)
    1969 green Pontiac GTO (Layla, AKA the black sheep)

    INSTALLS AND MORE.. http://www.ls1truck.com/forums/my-ga...-low-life.html
    Sticky/broken gauges? I can help. PM me for details.
    Reply With Quote Reply With Quote
  7. 03-26-2009 12:33 PM #7
    Melissa@NelsonPerformance's Avatar
    Melissa@NelsonPerformance
    Melissa@NelsonPerformance is offline Custom Tuning
    Join Date
    Sep 2007
    Location
    SA, Texas
    Posts
    1,308
    stock plugs are fine~

    Her name is A Meli-
    "If everything is under control, you are going too slow."- MA
    Reply With Quote Reply With Quote
  8. 03-26-2009 12:35 PM #8
    lo-lyf's Avatar
    lo-lyf
    lo-lyf is offline niiiice doggy.......
    Join Date
    Mar 2009
    Location
    Wichita Falls, TX
    Posts
    2,172
    right on, I always figured a spark is a spark. I just wasn't sure. i like to get as many opinions as possible.
    2005 black Yukon XL SLT - traded in for me wife's new Fusion (GM sucks these days)
    2002 black Yukon SLT (the skinny sister)
    1969 green Pontiac GTO (Layla, AKA the black sheep)

    INSTALLS AND MORE.. http://www.ls1truck.com/forums/my-ga...-low-life.html
    Sticky/broken gauges? I can help. PM me for details.
    Reply With Quote Reply With Quote
  9. 03-26-2009 01:02 PM #9
    GasGuzzler's Avatar
    GasGuzzler
    GasGuzzler is offline Pants on the ground
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Stock plugs are fine but what is stock has changed since yours was built. Put the ACD iridiums in it when it's time.
    Reply With Quote Reply With Quote
  10. 03-26-2009 01:40 PM #10
    timber74wolf's Avatar
    timber74wolf
    timber74wolf is offline timber74wolf
    Send a message via Yahoo to timber74wolf
    Join Date
    May 2008
    Location
    Houston, TX
    Posts
    252
    What do you think of the Bosch Platinum plugs?
    2014 GMC Sierra Crew Cab
    -5.3
    -Gibson Exhaust
    Reply With Quote Reply With Quote
+ Reply to Thread
« Previous Thread | Next 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

Forum Rules