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GSpence2

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Posts posted by GSpence2

  1. Follow up 

    Okay so AKG Intercoolers installed

    Getting the correct pressure pipes and hoses from Porsche was a pain in the arse because the parts manager couldn’t get it through his head I wanted parts that didn’t necessarily match my VIN #
    Took 3 tries and a week in delays 

    After getting parts sorted and everything square I have noticed smoother boost and a big bump at 3200-4000RPM (stays solid at .7 bar)

    BUT...

    Now I’m chasing intermittent O2 issues

    Alternating too lean or too rich on booth banks

    I will pull some live data to compare duty cycles-on/off behavior on boost off boost to see if there’s any correlation 

  2. I apologize for missing your question. We tried a few different ways. I have cold air intakes on with these large 6" come filters the easiest thing to try first was to remove a filter and intro smoke that way. Next we pulled off the bellows at the Y-pipe - I have an IPD plenum on - and put the wand in both sides traveling down to the MAFS and intercoolers.We pulled the IPD plenum off and got the wand through the throttle body to smoke the intake runners. Finally we pulled off the connections to the air injection pumps to see if there were any leaks at the CATS. A bit labor intensive but worth it.

  3. So I did some more data-logging today during a portion of my morning commute. Mostly low speed (below 25MPH) stop and go but a couple of places where I could really go fast (30-35MPH). If I am understanding and reading this data correctly my check engine light codes P2227 & P2225 are being caused by a vacuum and/or boost leak? Take a look and pay attention to time slots 12:59 & 16:57. Something weird happens both times when it feels like the timing is all of a sudden thrown off, and the truck hesitates, stumbles, loses power, and then snap crackle pops through the exhaust like a cheap rice rocket with a fart pipe. And each time this is with a steady easy throttle no mashing.

     

  4. So I tested the battery today and at rest no ignition I'm getting 12.6 volts. With the engine running I'm getting 13.85 volts. Battery is not even a year old yet. Okay no rodents, ECU check sums are checking out okay, BUT - I'm losing boost, and the timing is being retarded in a big way right when the turbos should start to spool hard about 26-2700 RPMs. Spool up to .3-.4 bar and then le poop! Full dump.

     

    Power loss, hesitation, stumble, no CEL - repeat. Hmm...curious...

     

    I'll try to capture some live data and post it. I'll try cleaning my MAFs too. I ran some Techron through a couple of weeks ago - didn't really need it but it was a gift so...

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