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Thread: Installed long tube headers, deleted egr tuning help please

  1. #1
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    Installed long tube headers, deleted egr tuning help please

    I installed long tube headers and deleted egr. On a cold start the car idles rich at about 12.6 and after a minute of idling it goes back to its normal 14.7 at idle. Trying to tune it to stay at 14.7 at cold start. Any help is appreciated.

  2. #2
    Advanced Tuner Ranger6202's Avatar
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    post the calibration
    Custom '85 Crew Cab Short Bed Lq4 swap
    '06 Turbo Vortec Maxx
    '87 Military K3500 LQ4 swap
    '96 K1500 lq4 swap, Howard Cam (216/224 @ .050, .551/.551, 114), Centerforce Dual Friction

  3. #3
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    Is this not normal? I know it's a touch rich. I would think you would want it somewhere in the 13's cold, but it does this to "act" like a choke did on carbs...

    Guess we need to know exactly what your after. That's all. I know you stated you want it to run 14.7, but.......
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
    Mobile Tuning Available for North Georgia and WNC

  4. #4
    Advanced Tuner Ranger6202's Avatar
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    Quote Originally Posted by GHuggins View Post
    Is this not normal? I know it's a touch rich. I would think you would want it somewhere in the 13's cold, but it does this to "act" like a choke did on carbs...
    That's where my thoughts were too. Was gonna post a pick of his eq ratio vs. coolant vs. map table to show him what it's doing.
    Custom '85 Crew Cab Short Bed Lq4 swap
    '06 Turbo Vortec Maxx
    '87 Military K3500 LQ4 swap
    '96 K1500 lq4 swap, Howard Cam (216/224 @ .050, .551/.551, 114), Centerforce Dual Friction

  5. #5
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    It only happened in open loop but I ended up changing my open loop EQ ratio all to .81 and now it's at 14.0 in open loop. I'm gonna mess with it a little more when I get home.

  6. #6
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    Before I removed the egr system and AIR pump it would go to 18.5 in open loop to heat everything up but since I eliminated the air pump is been doing that.

  7. #7
    Advanced Tuner Road's Avatar
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    Your motor was still running that rich with the air pump installed. The air pump was pumping air into the exhaust to counter react the rich condition on start up to reduce emission.
    Mike

  8. #8
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    ^ and to light cats off quicker....
    2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
    2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80

    ~Greg Huggins~
    Remote Tuning Available at gh[email protected]
    Mobile Tuning Available for North Georgia and WNC

  9. #9
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    When the pump was on it ran fine. It's when I removed the air pump the car would run really rich but I corrected the problem and it stays in the 14s at idle whether it's cold or warmed up

  10. #10
    Advanced Tuner Ranger6202's Avatar
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    why not '0' out your EGR airflow table rather than commanding a leaner OL EQ?
    Custom '85 Crew Cab Short Bed Lq4 swap
    '06 Turbo Vortec Maxx
    '87 Military K3500 LQ4 swap
    '96 K1500 lq4 swap, Howard Cam (216/224 @ .050, .551/.551, 114), Centerforce Dual Friction