vroom ZOOM's latest activity

  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    I just did a brake cleaner test, I unplugged the PCV hose and when the engine went to stall I shot some brake cleaner in there and it...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    tried putting the cheap injectors in. still wont run. will try the iac right now.
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    Just got the troll mode thing figured out. unfortunately that did not point me to my issue. The neutral switch just had some resistance...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    If I can get it to stay running the IAC will go over 100. Check the data files I emailed you with the good and bad engine.
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    On my running engine the pulsewidth is 3.5, and map is around 21. BUT the port engine did decide to idle today at one point, albeit very...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    Transmission Mufflers and exhaust plumbing shift cables throttle cable water pump load anticipation switch trans temp switch trans...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    Okay... so I found something else funky yes but it will rev to almost 3k then almost stall, then catch and rev up again etc. Any ideas...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    Ok, as I dig through this things get super wierd. in diacom, there is a parameter called "Troll Mode input". I disregarded it at first...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    I think it is time for me to invest in an oscilloscope. I want to compare the injector voltage and current waveforms on both engines to...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    Well, I just honed in on another huge clue. I ran a data log through diacom on the working engine to get some numbers. At idle, the IAC...
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    Yes it is the TBI style system (delco EST). No crank sensor. I swapped entire distributors. Both work on the starboard engine.
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    about 15 seconds. That is an interesting observation though, I will go see if it changes in a longer timeframe.
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    ECT sensor seems to be reading just fine.
    • 1753713695612.png
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    That was the first thing I did, 45 psi solid all the time.
  • vroom ZOOM
    vroom ZOOM replied to the thread 454 mag mpi chuggles/stalls.
    Well I am completely pulling my hair out. Will call the place I bought the motor from and see what they have to say. Its fair to say I...
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