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Added Mods, Getting Error Codes And Now Limp Mode

Discussion in '2015 V6 Mustang' started by Tom Stevens, Jul 9, 2019.

  1. Tom Stevens

    Tom Stevens New Member

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    I recently got a 2016 Mustang V6 and decided to add some mods to it: a Spectre CAI, BBK throttle body (73mm), and Airaid Poweraid TB spacer. Originally the CAI and TB were added, and got error codes right away... air leak from the TB or inlet valves. The rpm's were also abnormally high, around 1300 at idle. I added a spacer, but the problems persisted. I took it to an auto shop but they couldn't do anything other than find that the rpm's would go to normal if the AC was turned on... but when I went to test drive it today it went into limp mode after 6-7 miles; the engine also seems to be bucking a bit, not scary but slightly noticeable.

    I'm going to take it to an automotive shop, but I'd like to get any input as to what the problem might be and what the solution might be.

    Thanks in advance,

    Tom
     
  2. Pete fender

    Pete fender Pete Fender

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    Post the codes.
    Sounds like a vacuum leak.
     
  3. Tom Stevens

    Tom Stevens New Member

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    The initial code and one that keeps popping up is P2282, which corresponds with your reply... a vacuum leak. My thinking is that the leak should be easy to find and fix, right? Thanks for the reply.
     
  4. alexzander

    alexzander New Member

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    Maybe you forgot to put a vacuum hose back on?
    And a tune might fix the Air to Fuel ratio.
     
  5. Pete fender

    Pete fender Pete Fender

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    Check the hose on the throttle body.
    It goes to the evap system, it has a tendency to rot.
    Check all the hoses the easy way, get a cigar, take any one of the vacuum lines loose, and blow smoke into it.
    Smoke will come out where there is a leak.
    Here is a link to a video by crazy Scotty Kilmer, showing how it is done...
     
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  6. TammyInfub

    TammyInfub Member

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    yes I already knew that. What Im saying is it ran better with the 93 and it is tuned for 87, but does my Fine Tuning of advance have something to do with that also? Whats the most you can advance on 87?
     
  7. 08'MustangDude

    08'MustangDude Profile Violation

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    TB spacers do nothing. The vacuum leak can be any air inlet behind the throttle
    body. Usually, it's the TB gasket, or when you add a spacer, didn't use two
    gaskets; one at the spacer to manifold, then TB to spacer. Spacers are
    a total waste of money. That code actually states: Air Leak Between Throttle
    Body and Intake Valves; which is the TB and anything behind it.

    Possible causes
    Unmetered air leaks between throttle body and intake valves
    Air leaks at the intake manifold
    Positive Crankcase Ventilation (PCV) system is leaking or the valve is stuck open

    Since it happened after you installed the TB spacer, well, that's pretty obvious.
     
  8. Pete fender

    Pete fender Pete Fender

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    You added a cold air intake and throttle body, before the spacer.
    Try "Reverse Engineering."
    Remove the spacer, return it if you can convince the seller it is causing a problem.

    Check the throttle body carefully, if removing the spacer does not help.
    Either there would be a leak, or the bore is larger than the inlet hole in the manifold.
    Check wiring, just to make sure.
    Also, the hose that connects to the throttle body, goes to the evap system, and is made f a lighter hose, unless it has already been replaced.
    They seem to have a habit of deteriorating, causing leaks when handled.
    Some times your fingers get black from checking it.
    The lines go under the passenger side inner fender.
    If all else fails, on of the hoses may have a leak, but usually throws an evap code, P0456.

    Check all of the connections and clamps on the CAI.
    One of these may be your leak. the problem.

    Once you get the car running, you can add your mods, but check each one separately, as putting everything on at once makes it difficult to troubleshoot.