The Great Van Damn Thread

Discussion in 'Shiny Things' started by a1fa, Mar 12, 2012.

  1. a1fa

    a1fa Throttle Jockey™

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    Several nights ago I cleaned the main ground, and re-plugged every sparkplug wire connector into the distributor cap. I also moved the ECU ground, and condenser and positive connectors on the coil so they don't bind or cross in anyway. 30 mile ride to friends house, and no issues.

    While talking to my buddy about AFM, and contemplating running a new ground from the wiper to the AFM male connector, we noticed that the wiper is a bit lopsided and barely touching the ground. Touching the wiper in a negative way, pun definitively intended, and the engine produced same symptoms of fuel hay-wire, and backfiring. A quick bend job, and now the AFM plug ground is making full contact with the wiper blade. No issues so far.

    Only time will tell how successful this was. I stopped by a gas station and got another 12.5 gallons of gas on about 200 miles.... not bad for a first tank of gas, and getting things all worked out and broken-in....

    So far I have put 140 miles since the ground fix, and there have been no episodes of bucking.
    #41
  2. zgfiredude

    zgfiredude Old Fart in Training.......

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    Can you post a pic of this area for me?
    #42
  3. a1fa

    a1fa Throttle Jockey™

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    Here is someone from Porsche 944 forum, cleverly fixing the problem once and for all:

    [​IMG]

    You see the problem was between that very thin wiper blade that runs along the shaft, where it meets the big round copper run. :wink:
    #43
  4. zgfiredude

    zgfiredude Old Fart in Training.......

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    interesting design, i have a little stumble in my FI bug, i'll have to take a look at that.........does it kind of mimic a vacuum leak stumble? Mostly on throttle demand?
    #44
  5. a1fa

    a1fa Throttle Jockey™

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    Yeah feels like a stumble, like its running out of gas... a bucka bucka bucka bucking thing.
    #45
  6. seriousracer

    seriousracer be a man dodge tree bark

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    i am not f***ng stupid,but i used too. niles mi.
  7. a1fa

    a1fa Throttle Jockey™

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    200 miles since the last buck-a-buck-a episode, and it is back with vengeance. This time I filled up a full tank of gas (~12.2gal to full), and a mile down the road it started bucking.

    I'm thinking, I either have some kind of plastic or rubber in the gas tank obstructing the outlet, or some kind of strange issue with the gas tank venting. Opening the gas cap, and running the fuel pump, or engine did not fix the problem. Coincidentally, I bucked over to an incline \ facing up the incline, and waited for 10 minutes, and issue went away. Put 40 miles, and no bucking....
    #47
  8. STANIMAL

    STANIMAL SUPPORT THE SECOND

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    What's the latest news ?
    #48
  9. seriousracer

    seriousracer be a man dodge tree bark

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    i am not f***ng stupid,but i used too. niles mi.
    <iframe width="420" height="315" src="http://www.youtube.com/embed/H17iR1yHqzg" frameborder="0" allowfullscreen></iframe>
    #49
  10. a1fa

    a1fa Throttle Jockey™

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    The latest news is that the issue is back with vengeance! Complete failure. The van will not start, and when it does start, it runs like shit, missing, and hissing.

    Today, when I get off work, I am going to test the fuel pressure, to make sure there is no blockage in the system, and after that, I am gutting the complete upper end to Ohm everything. :puke1
    #50
  11. Geek

    Geek oot & aboot

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    You sure you don't want to rename this thread The Great Damn Van Thread?

    :(:

    sorry mate. stick to it.. you'll figure it out.
    #51
  12. a1fa

    a1fa Throttle Jockey™

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    Thanks for the words of encouragement. The good thing is, its completely broke, not some dinky intermittent problem. Now we can focus on finding the problem, and resolving it, where as before, the problem would appear, make you stranded, and resolve on its own. :eek1

    This time, the van is grounded, the problem is there, and now, all I have to do is dig for it.

    One thing that I would like to do is build a tap into the harness leading into the Arduino board for future on-board diagnostics, but not sure how that would affect impedance and resistance, and if it would have any effect on ECU.

    Chin-up, balls down!

    :clap
    #52
  13. a1fa

    a1fa Throttle Jockey™

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    Problem found. Points were arching -- bad condenser, ruined the points.
    #53
  14. bmw318tech

    bmw318tech Been here awhile

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    Good job. Always feels good to find the smoking gun. Ends up being something simple every time it seems.
    Leave it to the germans to install fuel injection but leave the points ignition set up. It had more parts than an electronic set up so it must be better, right?
    #54
  15. a1fa

    a1fa Throttle Jockey™

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    Brand new points.
    Brand new condenser.

    Same thing! Same problem. I almost started an electrical fire. I think ECU was, and if it was not -- now is, FRIED:wink:

    This begs the question, proceed to develop MegaSquirt, or go ahead and get 'em Dual Webbers.. The L-Jet is no longer worth salvaging. :puke1
    #55
  16. zgfiredude

    zgfiredude Old Fart in Training.......

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    Crap.....I have been nearly in your shoes with my bug..........and IMHO (which you did not ask for) I'd go with the webers.....and drive that bad boy!
    #56
  17. a1fa

    a1fa Throttle Jockey™

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    #57
  18. STANIMAL

    STANIMAL SUPPORT THE SECOND

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    Not to be a dick , but remember what I told you a while back ? Buy a set of carbs and be free of stupid problems like this . The injection parts are expensive and are getting harder to find . Either way , good luck and keep us posted . PM if you need further help .
    #58
  19. a1fa

    a1fa Throttle Jockey™

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    :evil True that.. True that.... I need to see if these valves are closing all the way. Compression check on isle #3. Compression check, isle #3, please.
    #59
  20. Goggles Paisano

    Goggles Paisano La Muerte Peluda

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    I vote for webbers also. Cool.
    #60