engine rpm problem

jason1 · Jan 18, 2011

I own and operate a kiot ck25 tractor. For 3 years it has run perfect. But after the last fueling, the engine will not go above 1600 rpm. The tractor starts good, The A-B lever is in nuetral, it runs good in idle, I have good hydraulics, I checked the fuses(all good), The tractor will drive in all gears good, but cant obviously gain speed because of the fact that it will not accelerate above 1600 rpm. I changed the fuel filter, checked all other fluids(all good) bleed the fuel system as per the operator manuel. I am at a dead end, and the snow is coming with plow jobs soon to be backed up. anyone with a possible solution? need help.

kjung17 · Jan 18, 2011

Jason, I know nothing about Kioti. Here's my 2 cents. Many JD compact models with HST have a cruise control feature that can limit engine rpm. This feature is often activated by unsuspecting operators. Another option would be 540E pto selection (if equipped). Some tractors limit Engine speed when 540E is selected so as not to overspeed the implement. Are you completely familiar with your tractor's options and functions? Please don't be offended by that question. Many operators are not.

bp fick · Jan 18, 2011

I don't like that phrase, "after the last fueling."

Low power and low rpm can sometimes be the result of bad fuel, even fuel polluted with gasoline.

If this never happened before and commenced immediately following a recent re-fueling, I'd start right there. I'd drain it. Usually done easiest by uncoupling the fuel line. Gravity feed it into an extra fuel container or containers.

Re-fuel with KNOWN GOOD DIESEL from a truck stop or busy fuel mart, and not the place or origin where the last fuel was purchased.

This is the quickest, easiest thing to do. With any luck, you'll be pushing snow in a few hours.

wallace · Jan 18, 2011

Is it a gear or hydro?

jason1 · Jan 18, 2011

Thank you to those who have replied. Definately not offended, in fact I do believe I have to look into what exactly the features the tractor has to offer. I did look into the tractor and thought I had a good understanding of the vehicle I purchased. The tractor is a gear driven vehicle not hydrostatic. As far as the fuel I did drain about a gallon out by gravity feed. There was a bit of water in the diesel. That promted the fuel filter change. and of course the bleeding of the fuel system. I will look into the fuel issue more in depth and I will check the advanced features and give an update.
And again no offense taken, i am willing to take advice.
Snowing now hoping to be plowing tomorrow.

Coyote machine · Jan 18, 2011

I'd say to check other obvious things like a clogged air filter, maybe a mouse built a nest in yours. It does happen. I nearly blew up my old Lawn Chief 36" mower a number of years ago due to the exact same thing happening. The mower could not get any air and ran so rich it nearly caught on fire!:confused2:
When all else fails check the obvious items. Post back results!

Lloyd_E · Jan 19, 2011

jason1,

I had a similar problem.
http://www.tractorbynet.com/forums/kioti-owning-operating/181159-loss-power.html

I ended up putting a filter between the tank and the pick up fuel pump. Solved the issue.
Hope this helps.

lloyd

Gittyup · Jan 19, 2011

throttle linkage/travel? How does it run at 1600 rpms?

wallace · Jan 19, 2011

Is it a gear or hydro?
If it is a gear are you getting the same responce from the foot pedal as your are with the hand lever?

jason1 · Jan 20, 2011

I am getting same response from foot and pedel controls. I drained the diesel tank 100%. Filled with new diesel, drained again to ensure quality. I bleed fuel system at the diesel filter bowl, and at the injectors. Still running a consistent 1600 rpm. Is it possible I still have air in the system? Could the fuel pump be going bad? Is there other relays or fuses that could be going bad, as far as the fuel system is concerned? I have been reserching the tractor and it seems to be pointing toward the fuel system and possible air intake. The tractor does run good at 1600 rpm's and when i purged the injectors it did run rough until I closed them. scratching my head at this point.

CowwFace · Jan 20, 2011

Hey Jason1,

I'm following this thread so I wanted to give it a bump back to the top. Almost sounds like a governor issue... does the throttle linkage stick at 1600 rpm (I'm sure you've checkd that already) .

kjung17 · Jan 20, 2011

I was thinking along the same line as CowwFace. Is the injection pump mechanically controlled? Does the throttle arm make contact with the upper limit stop?

mj007 · Jan 20, 2011

kjung17 said:
Jason, I know nothing about Kioti. Here's my 2 cents. ........

Here ya go ..... $.02 :confused2:

Gittyup · Jan 20, 2011

Have you reached under the hood and tried to move the throttle linkage by hand? You might have to take the cable off to get full movement without fighting the cable. Mine was sticking where it feeds through the firewall. Had to adjust it a bit and all was fine.

If it's running good and just won't go any faster, it sure sounds like throttle/governor or linkage thereto. Throttle travel will be affected by both foot pedal linkages as well as dash throttle linkages. Either one could stop your travel if misadjusted.

jake98 · Jan 21, 2011

Kioti had a run of bad injector pumps, call your dealer.

jason1 · Jan 21, 2011

I have successfully located the issue with the help of the members of this site and a mechanic friend. The problem was the outer spring in the injector pump. The end of it came off the attachment point. This explains why it ran so well at idle and up to 1600 rpm. I can tell you all that a simple look under the inspection plate several days ago would have saved me hours of grief. The inspection plate itself looked like something I didnt want to touch. But within seconds of its removal the problem was solved. The good thing is i have a great appreciation for this site and it pointing me in the right direction. thank you to all that replied. I also have a good or better understanding of my tractor and engine compartment( being a tinker workaholic overachiever i couldnt help myself not to tear into the hole thing). Lesson learned is start with the basics and then when your past your point of skill call somebody else. Of course pulling that plate off wasnt hard but did look like something I could get myself into trouble with. Again thanks to all that replied. Now warranty on the fix is the next hurdle. And then onto the gallons of water I poured into my tank from the gas station. My buddy was scratching his head on how the two of them happened at the same time. thanks again

Steve_Miller · Jan 22, 2011

Glad you found it and even more thanks for posting what you found. Happy motoring.

Steve

jimmyj · Feb 14, 2011

Steve_Miller said:
Glad you found it and even more thanks for posting what you found. Happy motoring.

Steve

x2. Very helpful post to put in the old memory bank (actually I hope it never will be).

Jerry/MT · Feb 16, 2011

jason1 said:
I have successfully located the issue with the help of the members of this site and a mechanic friend. The problem was the outer spring in the injector pump. The end of it came off the attachment point. This explains why it ran so well at idle and up to 1600 rpm. I can tell you all that a simple look under the inspection plate several days ago would have saved me hours of grief. The inspection plate itself looked like something I didnt want to touch. But within seconds of its removal the problem was solved. The good thing is i have a great appreciation for this site and it pointing me in the right direction. thank you to all that replied. I also have a good or better understanding of my tractor and engine compartment( being a tinker workaholic overachiever i couldnt help myself not to tear into the hole thing). Lesson learned is start with the basics and then when your past your point of skill call somebody else. Of course pulling that plate off wasnt hard but did look like something I could get myself into trouble with. Again thanks to all that replied. Now warranty on the fix is the next hurdle. And then onto the gallons of water I poured into my tank from the gas station. My buddy was scratching his head on how the two of them happened at the same time. thanks again

I doubt that there was any "....the gallons of water I poured into my tank from the gas station." Most than likely the the water contamination came from condensation in the tank, a naturally occuring process.

Keep the tank full to reduce this and treat the fuel with a water dispersant ( like PS White, et al) in the fall to prevent freezing of condensate in the tank bottom.

Change your fuel filter in the fall before freezing weather and keep a spare filter on hand in case your fuel filter freezes up. With a water dispersant in the fuel, it will freeze on the filter (that's the bad news) and you can change the filter and get running again(the good news). If it freezes in the tank bottom where it collects......bigger problem.

Remember to drain your filter and your water separator (if you have one) before and after using the tractor to help rid yourself of condensate in the fuel.

Glad to hear you're up and running.