Problems towing
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 14 of 35

Thread:
Problems towing

  1. #1
    Member The Chaz's Avatar
    Join Date
    Jan 2008
    Location
    Susanville, CA
    Posts
    97

    Default Problems towing

    I have been having problems with my engine losing power around 3500 RPM's when I am pulling the tube. I ran yesterday for several WOT passes and it ran perfecty. 67.7 on GPS @ 5600RPM's on an A cut When I add drag to the boat though it runs perfectly up to the 32-3500 mark then I can hear and feel the motor "bog" down. I can floor it and get it going again but it will return to the "bog" when it gets back to the mid RPM's. I thought it was a fuel delivery problem initally and replaced all the fuel lines and cleaned the electric carter fuel pump. It had rust debris in the screen. It seems to work fine even in the problem RPM's for a few minutes, but once it starts even shutting down and letting the fuel pump run for a bit does not stop the problem. Anyone have any ideas as I am stumped and am leaning towards a pump issue now?? Could the loader be overloading?

    Thanks for any and all ideas on this.

    Last edited by The Chaz; 08-31-2008 at 12:05 PM.

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member
    Join Date
    Jul 2008
    Location
    Kingman/Golden Vly, Az
    Posts
    1,278

    Default

    might i suggest, borrowing another elect or mech pump n see if it does the same thing!...i personally have never heard of a loader over loading...just my .02 cents

    FastRat

    p.s. "very" nice looking boat!

  4. #3
    Senior Member TALYN's Avatar
    Join Date
    Jan 2008
    Location
    Mesa, Arizona
    Posts
    345

    Default

    I would bet on the fuel pump as well... sometimes when they get hot/old they won't hold pressure.....
    myspace.com/jltbusa

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Senior Member bp298's Avatar
    Join Date
    Dec 2007
    Location
    LHC
    Posts
    6,573

    Default

    my bet is a carb(s) issue, like an issue in the transition circuit. if you had debris in the lines, you've probably got debris in the carb. take 'em apart, clean 'em up, blow 'em out really well and reassemble. if it didn't do it before, it shouldn't be doing it now.

  7. #5
    Member The Chaz's Avatar
    Join Date
    Jan 2008
    Location
    Susanville, CA
    Posts
    97

    Default

    I installed a new fuel pump and noticed that the fuel pressure gauge sits at a steady 7lbs now (not running) it bounced the needle rapidly between 4-8 with the old one, I thought that was normal
    Will see if the problem is cured tomorrow.

    If not, I will clean out the carbs
    Last edited by The Chaz; 09-06-2008 at 01:05 AM.

  8. #6
    Cantard 71hallett's Avatar
    Join Date
    Mar 2008
    Location
    snow bank
    Posts
    5,017

    Default

    Are those the carbs with the little filter that goes in the inlet fitting? Maybe debris just got that far?
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

  9. #7
    Member The Chaz's Avatar
    Join Date
    Jan 2008
    Location
    Susanville, CA
    Posts
    97

    Default

    Not sure... they are Holley 600's choke removed, thats all I know for sure, E-bay purchase and bolted on. Had to adjust the float levels with the set screw, but that is all I have done to them. I run 2 see thru filters before the fuel pump, one for each tank side and an electric tank switch b4 the fuel pump. 3/8" hose from tank to carbs.

  10. #8
    Senior Member ol guy's Avatar
    Join Date
    Mar 2008
    Location
    Lake Elsinore Ca
    Posts
    3,839

    Default

    Quote Originally Posted by The Chaz View Post
    Not sure... they are Holley 600's choke removed, thats all I know for sure, E-bay purchase and bolted on. Had to adjust the float levels with the set screw, but that is all I have done to them. I run 2 see thru filters before the fuel pump, one for each tank side and an electric tank switch b4 the fuel pump. 3/8" hose from tank to carbs.
    Is this a new system or has this problem just showed up on a motor that ran fine before????

  11. #9
    Member The Chaz's Avatar
    Join Date
    Jan 2008
    Location
    Susanville, CA
    Posts
    97

    Default

    I have been changing things slowly all summer, I added roller rockers and a bigger solid lifter cam. I did not notice the problem after this mod however. I then added a MSD dist. This fixed all my electrical issues I was having with the old Accel magnetic electronic breakerless deal I had on it. It now starts perfectly, but it was after this I started noticing the "bogging" at 3200-4000 RPMS. The new fuel pump did not fix the problem

    I will check the carbs this week for debris then unless the pump is somehow binding (I know nothing about the pumps condition) I am clueless

  12. #10
    Cantard 71hallett's Avatar
    Join Date
    Mar 2008
    Location
    snow bank
    Posts
    5,017

    Default

    Do you know how much total timing you have?
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

  13. #11
    Resident Ford Nut Sleeper CP's Avatar
    Join Date
    Dec 2007
    Location
    San Diego County
    Posts
    10,074

    Default

    Is that pic at El Cap lake ?

    You need to re-size that picture

    Sleeper CP

    Big Inch Ford Lover

    "Dark Sarcasm"
    Going fast is only half the fun ... what you make go
    fast is the other half.
    " A Government big enough to give you everything you want is big enough to take away everything you have"

  14. #12
    Member The Chaz's Avatar
    Join Date
    Jan 2008
    Location
    Susanville, CA
    Posts
    97

    Default

    Quote Originally Posted by 71hallett View Post
    Do you know how much total timing you have?
    I do not have the total timing, but I tried to adjust it both retarding it and advancing from it's current setting and lost top end and ease of starting in both directions.


    Yes that is El Capitan, my local hole

  15. #13
    I don't feel tardy Hallett Dave's Avatar
    Join Date
    Jan 2008
    Location
    Lancaster
    Posts
    845

    Default

    Quote Originally Posted by The Chaz View Post
    Not sure... they are Holley 600's choke removed, thats all I know for sure, E-bay purchase and bolted on. Had to adjust the float levels with the set screw, but that is all I have done to them. I run 2 see thru filters before the fuel pump, one for each tank side and an electric tank switch b4 the fuel pump. 3/8" hose from tank to carbs.
    Replace the see through filters with bigger metalic canister filters and see if that makes a difference.
    It corrected an issue for me many years ago with the 460 in my 78 Bronco.
    The see through filter was not flowing enough fuel to that thirsty 460 while under a load.
    Last edited by Hallett Dave; 09-02-2008 at 10:21 AM.

  16. #14
    Senior Member
    Join Date
    Feb 2008
    Location
    Fremont,CA
    Posts
    129

    Default

    you better figure out that total timing before you continue or the fuel problem is gonna be the least of your worries Bro!

    Can I get a Amen!

    Look at the directions of that dist and see what dist comes set at .. then check it and adjust accordingly.

    for instance on my BBC my dist is set at 24 and I have set the intial to 12 = total 36

    if you over that id be worried and back it down. could be part of the problem or all the problem. exspecially since it started after installin that.

    im bettin to much timing.

    my 02 cents

    take it just as helpful advise not gospel tho..

    K-dog

+ Reply to Thread
Page 1 of 3 1 2 3 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in


Tags for this Thread

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95