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Thread: Rich Idle with fan running lean with out

  1. #11
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by kostelacd69 View Post
    Here is a picture of the bay. The Rad and Fan are offset to the passenger side and the filter is in the driver side corner. I also tried in speed density with the MAF disabled (c2901 set the fail in the tune to 1HZ) and still does it.
    Thanks
    Nice install, looks better than factory



    When you run SD do you get an immediate MSF DTC (if not then it's still using the MAF)...?

  2. #12
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by kostelacd69 View Post
    Here is a picture of the bay. The Rad and Fan are offset to the passenger side and the filter is in the driver side corner. I also tried in speed density with the MAF disabled (c2901 set the fail in the tune to 1HZ) and still does it.
    Thanks
    Quote Originally Posted by kostelacd69 View Post
    Stupid ass Iphone. Cant get the photo up right sorry
    Those pics show 2 different engines...

  3. #13
    Joe (Moderator) joecar's Avatar
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    +1 what Team208 said above.

    Also, IFR table depends on whether FPR is referenced or not, and on rail pressure.

  4. #14
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    Same engine in the same jeep. I will attach one better. As for fuel pressure it is 45 non ref.
    Here is the final tune.
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  5. #15
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    Quote Originally Posted by joecar View Post
    Nice install, looks better than factory



    When you run SD do you get an immediate MSF DTC (if not then it's still using the MAF)...?
    I did not. So would explain why i thought it wasnt MAF or MAP related.

  6. #16
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    Also you'll see in the photo that I'm running both the gm and jeep computers. Thats so I could retain cruise control, air bag function and full gauge cluster

  7. #17
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by kostelacd69 View Post
    I did not. So would explain why i thought it wasnt MAF or MAP related.
    Without a MAF DTC the ECM will attempt to use MAF, even if it has to calculate it.

  8. #18
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by kostelacd69 View Post
    Same engine in the same jeep. I will attach one better. As for fuel pressure it is 45 non ref.
    Here is the final tune.
    Ah, I see now, I was getting confused by the images being upside down I have to work on that skill

  9. #19
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by kostelacd69 View Post
    Update, after thinking about failing the MAF by setting the fail number to 1HZ I tried unplugging the MAF all together. After that the engine stopped doing its lean and rich idle. So that says the MAF is seeing more turbulent air from the fans (it wasn't very steady to begin. 5.3 + cam + 4 inch intake tube= slow crappy air), so I cut the intake tube apart, added a air straightener and its fixed!
    Ok, this is good to know.

    Now on to the short terms. This computer was reading long and short terms, it was also reading Park and Neutral from the switch. It now doesn't do any of those things now. In fact the o2 voltages are way off all the time on both sides regardless of AFR and rpm. Did a full reflash of the original tune i started with that i knew it all worked on and still nothing. Guessing the PCM is a POS. Going through the process of getting another one.
    Check all the engine grounds, and check all the fuses.

  10. #20
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    Figured it out. 02 Camaro tune only requires one ground to see park and neutral, where as the truck OS requires two (pin 32 and pin 34). That is why I would see park/neutral in one OS and not the other. As for the for the fuel trims, one o2 was hanging out at .435 to .465 volts. That tells the PCM that the o2 is bad and wont start fuel trims. All fixed and working.
    Thanks

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