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Thread: Strange Issue - Bogs Under Acceleration

  1. #11
    Uncensored Hypocrite stevedmc's Avatar
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    Bring a trailer sir. I'll hook you up.

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  2. #12
    Banned From "Tight Ship"
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    Drac, I think Dave might have been on to something...you say it was "misting", but it should squirt a solid stream(s), throughout the stroke. Otherwise it will go lean and bog. At times, it sounded like it was going lean to me, but hard for me to tell in the vid.
    Thinking along that line, I noticed that your choke was open and that the temp gauge was not up...was it cold?
    No longer looking for 5 speed D -- Working on "The other DeLorean" (1966 GTO).

  3. #13
    As seen on TV! Dracula's Avatar
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    Quote Originally Posted by Bitsyncmaster View Post
    I tested one of Bill units and this is what I found.


    Ford ECU

    Well I could not wait. So hooked up the Ford unit and ran my tests. One thing, the wiring diagram showed the distributor sensor signal and ground terminals reversed (my engine barely started until I reversed those wires).

    Ignition timing = 13 deg BTC
    0 RPM coil current = 7.0 amps
    850 RPM coil current = 5.6 amps and 70 deg dwell on 4 cylinder scale
    2500 RPM coil current = 4.1 amps and 65 deg dwell on 4 cylinder scale

    So it does seem like the Ford ECU does not change dwell much with RPM increase. Also works like the stock unit and draws power with the key on and engine not running.
    This turned out to be the case. By reversing them, my engine sputtered and backfired. I'll try back in an hour; seeing as I've most assuredly flooded the engine.
    -Chad K.
    Previous owner of VINS: 6982, 1601, 1265, and 1269

    Dammit, Jim. I'm an undertaker, not a mechanic.

  4. #14
    As seen on TV! Dracula's Avatar
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    Still not right. I threw a different carb on the car and, while it helped a little, the two stacks in the center still fill with gas and flood the thing. At this point, I need a set of outside eyes to tell me what's wrong with it.
    -Chad K.
    Previous owner of VINS: 6982, 1601, 1265, and 1269

    Dammit, Jim. I'm an undertaker, not a mechanic.

  5. #15
    Just Plain Nuts Boo's Avatar
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    I had the issue of the carb bogging down when giving gas and it was actually lean drop from it having the "power valve" or what Bill calls the "full throttle enrichment " valve in . Once I installed the valve it ran fine. Maybe your valve is bad ?
    Lou and "Boo" - The man you love to hate.

    Boo- The car you love to hate.

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  6. #16
    Just Plain Nuts Boo's Avatar
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    Quote Originally Posted by Lou and "Boo" View Post
    I had the issue of the carb bogging down when giving gas and it was actually lean drop from it having the "power valve" or what Bill calls the "full throttle enrichment " valve in . Once I installed the valve it ran fine. Maybe your valve is bad ?

    Couldn't edit but I meant the power valve was NOT in and after installing it, then bogging down was resolved
    Lou and "Boo" - The man you love to hate.

    Boo- The car you love to hate.

    ~~~~~~~~~~~~~~~~~~~
    "Boo"-VIN 5835
    'Fastest naturally aspirated PRV'
    ~~~~~~~~~~~~~~~~~~~~
    "Blue"-1985 Fiero GT
    3800sc swap
    ~~~~~~~~~~~~~~~~~~~~
    "Spalding"-1973 MG Midget
    All original

  7. #17
    As seen on TV! Dracula's Avatar
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    What confounds me most is that the intake and manifold worked on Steve's car.

    Tonight, I'm going to try a compression test on all the cylinders and see from there.
    -Chad K.
    Previous owner of VINS: 6982, 1601, 1265, and 1269

    Dammit, Jim. I'm an undertaker, not a mechanic.

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