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Thread: Any idears? Hard to start.

  1. #11
    Join Date
    Nov 2009
    Location
    Appleton,WI
    Posts
    69
    plug your coolant temp sensor back in. I had the same problem after installing my headers.

  2. #12
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    Why would I have removed my coolant temp sensor? Why would it become hard to start after a week of running them?

    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


  3. #13
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    First, my tune has been pulled and is going to be sent to my tuner in about 5 minutes. Secondly, I ran a brief scan on the truck today at idle and guess what? Greg was right. My o2s are slow. Now, my o2s could be slow because the truck is running so rich. I believe the main issue here is fouled plugs. I'm going to wait for my base tune, then change the plugs and do some scans... hopefully tomorrow.

    Edit: Coolant temp sensor was fine by the way.

    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


  4. #14
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,005
    Changed plugs today and it didn't help much. Also got a new base tune at the same time.

    New developements:

    1) Worse on hot starts.
    2) If I kill the truck and start it again immediately, it starts fine.
    3) Wait 10 seconds and it cranks for 5+ seconds again.

    No ideas?

    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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