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Power problem

Discussion in 'Daihatsu Hi jet References' started by mhall, Aug 19, 2010.

  1. mhall

    mhall New Member

    I have a S110P five speed, it revs up in neutral. When you take off in first it runs good, 2nd it runs good, 3rd it does pretty good but will have to downshift if very much of a hill, 4th will barely pull itself and steady decrease speed, 5th you can just put it in but it might as well not even be there. Just bought it and wanting to see what might be the problem. Have taken the exhaust loose to make sure it was not clogged, air and fuel have also been checked. I thought about timing advance not working and going to check it. Can someone help me with this.
    thanks
     
  2. blakkmoon

    blakkmoon Member

    Just off the top of my flat head
    Bad fuel ?
    Clogged fuel filter ?
    Moisture in the fuel ?
    Just a place to start
     
  3. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    Compression check? needs to be 170psi+. 165 min. Is it smoking? Carb. kit?I believe if timing was off you would feel it fall off in 1st also.
    I'd Sea Foam the carb. Cheap fix if it works. I recently had a s83p that came in the shop. Started fine, idles fine, step on the gas in neutral fine. Put it in 1st give it the gas and it falls on its face. 2nd, 3rd,4th was the same. Pulled fuel line off of tank and sucked about a 1 cup of sea foam into the carb. shut off engine for about 30 min. let the magic happen and varooooooom.
     
  4. fupabox

    fupabox Well-Known Member

    If the carb cleaning doesn't work(follow Trax's advice with the seafoam,and you should be good...following Trax's advice is always good, he knows his mini trucks) and the compression is good .I would check the valve clearances (tight valves may cause slightly lower compression as well,it will also burn out valves if not fixed) loose valves (lots of valve ticking when warm ) can cause a loss of power that may not be noticed as much in lower gears.
     
  5. mhall

    mhall New Member

    I also forgot to mention that it is only getting about 6 to 7 miles per gallon.
     
  6. fupabox

    fupabox Well-Known Member

    Have you checked to see if you have any fluids in the diffs. tranny and transfer case...brakes sticking ?
     
  7. mhall

    mhall New Member

    everything is good
     
  8. fupabox

    fupabox Well-Known Member

    I know you mentioned taking the exhaust off and checking it..did you take the catalytic converter off and make sure you can see through it ...your symptoms are almost dead on for a clogged catalytic converter
     
  9. mhall

    mhall New Member

    Took exhaust off at manifold
     
  10. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    And ? and ? and ?
     
  11. mhall

    mhall New Member

    tried the sea foam and still the same problem.
     
  12. mhall

    mhall New Member

    it is a 97 model
     
  13. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    In the past how was truck running? Did this problem come on in one day or over some time?
     
  14. mhall

    mhall New Member

    i have owned it for a week and a couple days
     
  15. mhall

    mhall New Member

    Does anyone have any other suggestions. It will be greatly appreciated.
     
  16. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    Maybe the high speed jet clogged, floats out of wack (unlikely) Since day one that you have had it, its done this? How many kms or miles?
     
  17. mhall

    mhall New Member

    It has almost 26 KM on it and it has done it since day one. I am thinking it might be in the carb but it cranks and idles fine but it uses a lot of fuel.
    Thanks for the help. If you can think of something else let me know, in the mean time I will be looking over the carb.
     
  18. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    Pull your plugs and see if they are wet and jet black. If so you might have a float problem. My guess after what you just said indicates a carb. problem. Might be getting to much fuel on the upper end ? I'd also go ahead and check compression on all three cyls. for grins. At least you will know.
    Chad Hite rebuilds these carbs. If you need him he can be reached @ 270-331-1414 after 4:30pm.
     
  19. mhall

    mhall New Member

    It revs up good when in neutral. Do I need to take the plugs off after ran hard or after at an idle.
     
  20. TRAX and HORNS

    TRAX and HORNS Well-Known Member

    On second thought the plugs are what they are. The only way to really tell anything through the plugs would be with a new set. Yea, with a new set you would run it hard about about a mile then look at them. Just pull the old ones and see what they look like. They should be a nice tan color. If they are black you are running rich. Which would lean towards the problem you are having considering the carb.. You can pull up a good plug chart on the web.
     
  21. mhall

    mhall New Member

    Took the carburetor off of my 97 daihatsu hijet and cleaned it up and put it back on still the same problem. Changed the spark plugs also. Does anyone have any suggestions. It idles good but just doesn't want to pull 4th or 5th gear and will wind up in 3rd and that is about 35 miles per hour. Can someone give me anymore suggestions what to do. I will appreciate it greatly.
     
  22. fupabox

    fupabox Well-Known Member

    when you removed the carb did you open the float bowl and check the main fuel jet ? let's look at this another way as well..bear with me ...in lower gears will it rev up to redline (if you don't have a tach hooked up I'm just wondering if it revs good and high) if so then I can't see how the main jet would be an issue,...I'm thinking you have a sticking brake caliper or wheel cylinder..as you speed up it is heating and expanding to the point that higher gears cannot overpower them..go for a drive and then place your hand near each wheel and see if one is significantly hotter..if you have a laser temperature gun then that will work perfectly to check the brake temps
     
  23. blakkmoon

    blakkmoon Member

    Last edited: Aug 30, 2010
  24. okaufman

    okaufman Member

    sounds like we have the same problem...and now that he mentioned it....i get really poor gas milage also....

    lets all keep intouch and see if we can't figure something out.....
     
  25. mhall

    mhall New Member

    i am almost positive that it isn't yhe brakes because i should smell them but i will check this afternoon.
     
  26. okaufman

    okaufman Member

    Any Updates?
     
  27. mhall

    mhall New Member

    Still the same, just like I thought no brake problem. I am about at the end of the line of the things that I am aware of and can't find any mechanic that works on these things.
     
  28. okaufman

    okaufman Member

    WOW..... I cant believe how similiar our problems are. I had to leave on a business trip but when i get back in town I have a mechanic friend who is going to take a look.

    I tried to take it to a few places....and nobody wants to work on my truck......

    I'm not giving up yet....

    I'm not much of a mechanic.......but i think the problem is with the exhaust.....have you tried to take off the muffler and CAT and test drive it?

    I'll definatly keep you posted but probably wont have anything to add until saturday.....

    if you discover anything in the meantime please let me know......

    i know its a stupid question......but could it be something as simple as an old battery?

    Are you in the united states? what state?
     
  29. mhall

    mhall New Member

    Took mine off at the manifold and it did the same. Not the battery if it will crank it. Texas.
     
  30. blakkmoon

    blakkmoon Member

    I am super interested in the fuel shutoff solenoid theory myself.
    Seeing as there seems to be 3 of you with very similar problems.

    Did a search for it and found a few threads.
    Some of the stuff in there sounds SIMILAR
    http://www.minitrucktalk.com/search.php?searchid=271070

    I am not at all familiar with these little beasts yet, but if you have the choke with the wax in it - ( i wonder if mine is the same ) that is like the old dodge K cars
    pain in the butt

    Just another avenue to look into

    I cant remember which thread it was, but I did read that the fuel pump WAS the issue.

    I remember years ago, with a 78 civic, and it had similar problems.
    Would idle, but nothing much more.
    Was able to limp it to a garage.
    Ended up being the fuel pump. It had just not totally failed yet.

    Found a great simplified explanation here
    http://en.wikipedia.org/wiki/Fuel_pump

    I like this forum
    it makes me think
     

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