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Tacoma running lean with TRD cold air intake fix

Discussion in 'Technical Chat' started by ottomastiff, Jul 2, 2011.

  1. Oct 11, 2011 at 10:16 AM
    #21
    SCFirefighter

    SCFirefighter on idiot patrol ;)

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    Awesome fix. I wanted to dump my K&N (which sucks in air on average 20F hotter than ambient air) for a TRD that sucks the air from the wheel well as it should. :)
     
  2. Dec 1, 2011 at 11:18 AM
    #22
    Vassily28

    Vassily28 Well-Known Member

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    Sorry but you say that removing this piece is not starving the engine in air anymore. You've done that cause it was lean. So doing that you let enter more air that is not measure by the MAF sensor and you think the mixture is richer! Sorry but you have lean the mixture.

    I can't comment precisely on the SC V6 cause i don't what are the change done on closed and opened loop by the reflash of the ECU.

    But for the NA engine, in closed loop, the motor can't go lean. It's still possible in open loop (WOT) in case you have changed the aspiration system and then the shape of the funnel where is install the MAF sensor is so different than the STOCK OEM it affect the way the ECU's calculating the amount of air. And it's not the case with the TRD CAI.

    To change the AFR on a NA engine you'll need to install a MAF calibrator to change the AFR ratio in opened loop and only in opened loop. In closed loop it will change nothing cause ECU is working against you to keep AFR close to 14.7.

    If you wanna change the AFR in closed loop you'll need a much more expensive electronic device like MAP ECU or APR x1.
     
  3. Apr 19, 2012 at 7:00 AM
    #23
    D4D Hilux Dude

    D4D Hilux Dude Well-Known Member

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    Have you ever had the lean code since?

    I was looking at the setup and I figure instead of cutting the end piece off, its possible to move the entire plastic assembly up to where it would be if the end was removed.

    let me know your thoughts on this
     
  4. Jul 11, 2012 at 4:55 PM
    #24
    jizzaldo

    jizzaldo Member

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    I'd like to know this as well. I've had a few lean codes pop up and sure enough my CAI tube was too long, it was blocking the crankase vent and the fpr line. I just cut the tube off. I'm hoping this fixes it.
     
  5. Jul 11, 2012 at 4:59 PM
    #25
    Aw9d

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    This didn't work for my 2nd gen intake. Whipper showed this to me awhile back, the tube on mine doesn't block any holes at all like in your video so there is nothing to modify.

    I don't get lean codes on my 2011, I get P0101 MAF performance out of range. I've tired everything I can think of to fix this, still no go. Ordered a 1st gen to see if that fixes my issue.
     
  6. Jul 11, 2012 at 5:03 PM
    #26
    jizzaldo

    jizzaldo Member

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    I think it mostly applies to s/c'd tacos. Mine was definitely blocked, and I am s/c'd. never got a lean code until i put the s/c on either.
     
  7. Jul 13, 2012 at 10:19 AM
    #27
    jizzaldo

    jizzaldo Member

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    This seems to have fixed my lean codes. I haven't had one since, and I'm quite confident I would have had one by now.
     
  8. Jul 13, 2012 at 12:55 PM
    #28
    Aw9d

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    Depends. My code would come on within 5 miles or 100 miles, it was never consistent.. I went weeks with no code, reset the ecu and would get a code with in a min. But hope it works for you!

    Edit, sorry I missed your post before saying that you are S/C'd.
     
  9. Aug 29, 2012 at 8:51 PM
    #29
    RELLIM

    RELLIM Well-Known Member

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    Scan Gauge II, AFE air filter, charcoal intake filter delete Fitch Fuel Catalyst, Alpine iDA-X303, AMS OIL (ENGINE) Bilstein 5100 RHA series
    I agree with Vassily28, in open loop the FRP is controlling the fuel flow back to the tank.
    If the small hose going to the FPR is blocked it creates a lean condition. The FPR is called an Atmospheric modulated pressure regulator. I rather have a constant or adjustable FPR.

    I can believe this is the problem or is part of the lean problem.
    I have plugged this tube going to the fpr, but the only this is that i have a stock intake and its not popping the SES code.
     
  10. Oct 6, 2012 at 3:58 PM
    #30
    gold68ht

    gold68ht Active Member

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    You don't. Some other engine manufacturers do, but my toyota 4.0 does not. I don't see why the other engines in the Tacoma would, either.

    Me either. You aren't changing the A/F ratio at all. TRD calls it a "cold air intake", but really you're just changing it out for a system with less baffles and restrictions in it. The TRD system's intake point is just inside the fender, just as the stock system does. You don't really even get a filter that flows any better than a regular paper filter in regular use, and the stock secondary filter/baffle system is downstream of the MAF in the OEM system, anyway.

    Just get it. I got mine off eBay new, about $450. No complaints at all. Had it for about 4,500 miles now. It's just a bolt-in mod. You will like the improved throttle response whether or not you get the supercharger.
     
  11. Oct 6, 2012 at 4:06 PM
    #31
    gold68ht

    gold68ht Active Member

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    All good things here. If you really are running lean, do you have a fuel system fault? Or if we're keeping things simple, did you double check to make sure your installation was correct? Maybe you have a coupling not tight enough? A coupler not seated on in a spot you can't see easily?
     
  12. Apr 2, 2013 at 6:48 PM
    #32
    mark fraser

    mark fraser New Member

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    Hi guys just wondering if any one knows if TRD do kit and flash for 1GR-FE . Iam in Australia and have Hilux we want to supercharge . Thanks in advance
     
  13. Jan 18, 2014 at 4:48 PM
    #33
    RELLIM

    RELLIM Well-Known Member

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    The problem is you can't block the small tube that comes from the FPR, it works off the atmospheric pressure within the intake system. During open loop which is wide open throttle, the FPR which is a valve system run off of atmospheric pressure closes to keep fuel on the fuel rail, so the engine don't lean out.

    So when you don't have the gas pedal mashed and the engine goes back in to closed loop the FPR valve opens and allows fuel to go back to gas tank.
     
  14. Sep 11, 2014 at 10:13 AM
    #34
    thewarriordinghy

    thewarriordinghy Well-Known Member

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    So if I have no supercharger, and a stock engine and I put this intake on would it run lean? and is it loud and would it ruin my engine?
     
  15. Sep 11, 2014 at 10:20 AM
    #35
    Burghlar

    Burghlar Well-Known Member

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    No, no, and no.
     
  16. Sep 11, 2014 at 10:23 AM
    #36
    thewarriordinghy

    thewarriordinghy Well-Known Member

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    So it doesn't add noise? everyone says it will? im talking about cab noise.(I think). So this IS a SAFE install with no harm?
     
  17. Sep 11, 2014 at 10:25 AM
    #37
    Aw9d

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    it will add noise under full throttle. Safe to run, even with S/C's we put one on and had no issues.
     
  18. Sep 11, 2014 at 10:28 AM
    #38
    thewarriordinghy

    thewarriordinghy Well-Known Member

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    then what is the whole deal about it?
     
  19. Sep 11, 2014 at 10:30 AM
    #39
    Aw9d

    Aw9d That one guy

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    It's a performance mod.
     
  20. Sep 11, 2014 at 10:34 AM
    #40
    thewarriordinghy

    thewarriordinghy Well-Known Member

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    but why does everyone say it'll run lean?
     
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