Bought a CC Dually 454 Whipple

Discussion in 'Member Trucks' started by Supercharged111, Nov 20, 2016.

  1. Supercharged111

    Supercharged111 I'm Awesome

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    Turns out the 2 plugs are numbered a little different, so the recessed AC recirc pin was actually mashed into the 5V reference pin for the TPS, that actually makes sense. Went for a drive and no codes yet, so maybe the evap was tied into it somehow? What's strange is that I don't recall encountering these codes before.
     
  2. JSlezak83

    JSlezak83 OBS Enthusiast

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    Maybe the 5V Reference signal is spliced.
     
  3. Supercharged111

    Supercharged111 I'm Awesome

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    Nope, traced it. TPS gets its very own wire. I'm thinking something got linked inside the computer? Evap is 12V and PCM gives the solenoid a ground. Either way, I don't see an evap code stranding me so I feel comfortable towing 600mi one way now.
     
  4. Supercharged111

    Supercharged111 I'm Awesome

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    Hooked this hot mess up and took off for OK for the big race. I had the pace again, but came up short on luck. 2 missed shifts fucked me hard for the podium in the final, I missed it by 1. Truck ran great for the first 200 miles, then started rolling coal again. It got worse, then better with throttle position. To me, this pointed to an O2 sensor even though I lacked data as it implied that open loop was good and closed loop bad. The reason I had no issues in CO was because throttle position here forces a downshift and open loop vs airflow much sooner than at a lower elevation. What happens is that, at a given throttle angle, much more airflow happens at a lower elevation than does a higher elevation. Also, a narrowband is more easily overrun than a wideband WRT airflow, this is part of why they read so much more accurately and also why I never rolled coal foot to the floor. Onto the next fuel/ignition issue.
     
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  5. Supercharged111

    Supercharged111 I'm Awesome

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    Incomplete drunk post above, I never mentioned that I unplugged an O2 to force the truck into open loop and that it ran normal again and picked up a little mpg. At my next gas stop, I swung by OReilly's and bought their only O2 sensor. I replaced the sooty O2 and shoved off and got fuel economy back into the 5 range.
     
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  6. Christian Steffen

    Christian Steffen I'm Awesome

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    Just get a jump on that blower install and convert it to two bar and run open loop all day.
     
  7. Supercharged111

    Supercharged111 I'm Awesome

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    I did SD open loop for a couple years, not a fan. The PCM sucks at dealing with temperature and elevation changes. The MAF and O2 sensors really help to fill in the gaps. The real holdup for the blower is Vista battling me with EFILive software. Once that's squared away I'll slap in the injectors and MAP.
     
  8. Christian Steffen

    Christian Steffen I'm Awesome

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    Have you run 2 bar OS on anything else? Perhaps it was something i messed up, but the last time i tried running the o2 sensors on a 2 bar hp tuners OS the o2 sensors fought with boost enrichment command AFR if it wasn't also in power enrichment.
     
  9. Supercharged111

    Supercharged111 I'm Awesome

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    No troubles with 2 bar on the 1500. In fact, I'm able to command around 13:1 under boost but not in PE mode. COS5 is badass.
     
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  10. Christian Steffen

    Christian Steffen I'm Awesome

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    Hmm maybe i need to research it a bit more and see if what I'm experiencing is normal.
     

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