1972 350 Surging Under Load When Stopped and at Operating Temperature

Discussion in 'Small Block Tech' started by Carlisle72, Feb 22, 2019.

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  1. rex362

    rex362 paint clear and drive

    2 ways for heavy fuel smell in gas ......flooding and through the pump
     
    rex362, Feb 26, 2019
    #61
  2. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    Ha! I can’t wait to be one of those. I learn best by doing, so this trial by fire is getting me there. I’ll try these ideas out!

    I think I took a wiff of the dipstick when I first took it out, I don’t think it smelled gassy, but I’ll check again. I just filled it with 93 the other night, and a few days before that, too. Should be fresh gas. Looking at the plugs, it does look rich, or drippy, right?
     
    Carlisle72, Feb 26, 2019
    #62
  3. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    Yes, rich. When you adjust the idle mixture screws, is there any reaction? If you turn them both all the way in, can you stall the engine?
     
    LARRY70GS, Feb 26, 2019
    #63
  4. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    Yep, I can stall it out.. I didn’t just have them horribly misadjusted, did I?
     
    Carlisle72, Feb 26, 2019
    #64
  5. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    No, that wouldn't do it. Overly rich mixtures would. I wonder if your power piston is stuck in the up position. If you stick a thin bladed screw driver into the carburetor vent with the engine off, you can depress the power piston down. It should spring back up when you take the tension off it. If you then start the engine, vacuum should hold the piston down, and if you wing the throttle, you should see the screw driver jump up. That's one way to test it.

    powerpistQjet.jpg
     
    LARRY70GS, Feb 26, 2019
    #65
    Carlisle72 likes this.
  6. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    Will do this right when I get home. Thanks, Larry!
     
    Carlisle72, Feb 26, 2019
    #66
  7. Quick Buick

    Quick Buick Arlington Wa

    Do it this time... I suggested sticky PP back on post 22..
     
    Quick Buick, Feb 26, 2019
    #67
    Carlisle72 likes this.
  8. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    Still learning the anatomy of carburetors, I remember you mentioning that but didn’t know how to test its functionality.
     
    Carlisle72, Feb 26, 2019
    #68
  9. Quick Buick

    Quick Buick Arlington Wa

    Thats what google is for.
     
    Quick Buick, Feb 26, 2019
    #69
  10. Quick Buick

    Quick Buick Arlington Wa

    If you needed more help at post 22 ask.. now at 65 It gets mentioned again..

    I assumed you checked the PP 30 postings ago.
     
    Quick Buick, Feb 26, 2019
    #70
  11. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    I apologize.. still getting used to the forum, and I had a lot of suggestions thrown out so I didn’t get the chance to check it out.
     
    Carlisle72, Feb 26, 2019
    #71
  12. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    You are doing just fine Jake. We are throwing a lot at you at once. We want to find the problem as much as you, maybe more, which leads to the frustration.:)
     
    LARRY70GS, Feb 26, 2019
    #72
    johnriv67 and Carlisle72 like this.
  13. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    I totally get it.. I was just thinking that I wish this was all at a car show or something - would've taken 5 seconds with all of the masters around. lol.. I'll do every single thing that's been mentioned, then I'll post findings after EVERY one of them is done.

    Again, all, I apologize for my ignorance and tomfoolery. Thanks for being patient with me, and for all of your advice. I've got my list, time to get at it.
     
    Carlisle72, Feb 26, 2019
    #73
  14. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    No apology necessary.
     
    LARRY70GS, Feb 26, 2019
    #74
    johnriv67 and Carlisle72 like this.
  15. gstewart

    gstewart Well-Known Member

    The only dumb question is the question that was never asked & should have.
     
    gstewart, Mar 1, 2019
    #75
    Carlisle72 likes this.
  16. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    Umm...

    IMG_6213.JPG
     
    Carlisle72, Mar 2, 2019
    #76
  17. Quick Buick

    Quick Buick Arlington Wa

    Looks bent.. Order a kit with a new rods..
     
    Quick Buick, Mar 2, 2019
    #77
    Carlisle72 likes this.
  18. BYoung

    BYoung Stage me

    Somebody muffed that up but good.
     
    BYoung, Mar 2, 2019
    #78
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  19. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    :DA right angle metering rod. That won't work. Wonder how that happened?
     
    LARRY70GS, Mar 2, 2019
    #79
    johnriv67 and Carlisle72 like this.
  20. Carlisle72

    Carlisle72 . . .But, these go to eleven.

    On it! Figures, I JUST ordered the rebuild kit without them.. could've saved on shipping. Drat.

    lol.. indeed!

    You sure it's not a "performance upgrade?" lol :D I have a theory on this I'll post when I get home from my gig.
     
    Carlisle72, Mar 2, 2019
    #80
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