2000 kat with 13k miles has high idle when engine is hot
My kat idles around 2k if the engine is super warm, usually I have to ride of the freeway for 20-30 minutes on a hot day to experience this problem. Riding around town, there are no issues (idles just above 1k), other than the bike takes a bit longer than I'd like to get warmed up. I have: Run sea foam through the vacuum line. Seemed to improve things a bit, but the problem still occurs. Opened up the carbs, they are very clean and everything seems in order, but I am not an expert. Checked the throttle sensors with an multimeter, seems to be reporting the throttle correctly. Checked the spark plugs. They are in decent condition, if anything, my mixture is a bit on the lean side.
Re: 2000 kat with 13k miles has high idle when engine is...
Check for air leaks. be sure to check the carb boots - those crack like crazy. Also check your throttle and return cables for proper operation. If the throttle does not "snap" back, lube the cables or better yet replace them with new ones. If all checks out ok then you have to check the throttle plate balance. You need a vacuum gauge such as this one http://www.saber-cycle.com/store/Tools1.html#735 . Turn the screw for each throttle plate until the pressure reads the same for eery cylinder.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
? 0:53
https://www.youtube.com/watch?v=sEiTi5GAcrQ
Jan 29, 2010 - Uploaded by stikkyp
My 1994 Honda Civic SI has an erratic idle. It stays at 3000-3500rpm when started cold till it warms up then ...
I don't think there is a fix. My 2000 wide glide has done that since it was new. If yours is like mine it is worse on the hottest days.
You can try lowering the idle speed but then it will be almost too low when cold. You will have to leave the choke pulled out a bit until the engine is thoroughly warmed.
Warning, with a low idle speed it might spit through the carburetor when you are going slow around a corner with the engine at low RPM, then when you open the throttle it could spit through the carb and quit running. Which means you will be at risk of tipping over if you are not quick to pull in the clutch and coast till you can restart the engine. It happened to me several times.
In a turn you will be leaned over. If the engine quits suddenly you don't have power to push you around the curve and the natural thing is to tip over even farther. Not good.
check the MAP sensor (manifold absolute pressure). The ECM (car computer) uses that to keep idle at minimum 750 RPM. It's normal for it to run high when cold. These small 4 banger motors typically run hot, and they won't run right IF they're NOT running hot, ergo the idle is usually high when it is cold so as to cause it to warm up quicker. If the RPM's drop below 750, suspect the MAP sensor, &/or ECM.
Check the regulator. It sounds as if it has packed in, when the engine is at idle the alternator output is low, but when revved it will be higher, the regulator controls the top end of the voltage range. Also check the battery connections are tight and free from corrosion.
Adjust the idle speed ONLY when the engine is at full operating temp. It should be idled at about 1000 RPM. It will probably be too low when cold and you may have to use the throttle control to keep the engine running until it gets completely warmed up. On the carburetor equipped engines, you cannot adjust the bike where it will idle cold and not be too high when it gets hot. The only way you can get this is with fuel injected models.
This is a fairly common problem with performance bikes. The problem comes from your thermostat. The thermostat is designed to open and close at a certain temp. What I suspect is happening is that your thermostat is opening too early for the bike to get to operating temp, hence the long time to warm up. Once you open up the bike warms up and the oil viscosity thins to operating temp and the engine revs more freely. Now your idle screws are set for a "cold" bike and revs high.
The other side is that the oil you are using may not be designed for your bike. Often people put performance synthetic oils in their bikes to perform better, but the production bikes are designed for thicker oils. Oils like 5w40 will be very thin allowing your bike to rev faster due to thinner oil, but you are causing extra wear on the parts due to less oil barrier.
First I suggest make sure you have the correct spec oil for you bike, then check that you have the correct thermostat in your cooling system. A performance bikes usual operating temp is between 95-105 deg C. This means your thermostat should only open at about 88deg C to start the regulation process.
It would usually start when completely cold, but idle around 2k RPM. It would drive fine. But if I shut it down, ran into a store, and came back out, it would start but immediately idle. Had to ride the gas a little to get it into gear. The Check Engine light has been going on and off for 6 months or so.
I took this to my local trusted repair shop (no Isuzu dealers within 200 miles). The diagnosed the light, and found that the Intake Gaskets were bad or leaking. The idling problem was related to the car not being able to control the amount of air coming in.
They replaced the Intake gaskets by the next day, and I haven't had a problem since. And no more check engine light, which has been on half a year.
Here's some details from my bill: (1) Intake Gasket set $107.95 Misc materials $21.00 2.1 hours of Labor
The total cost to me was $345.00, and I definately don't feel gipped.
I've got Hyundai Lantra 1.6 year 2000. It's take time to start when it's hot. When I start my car it revs at about 2k-3k rpm. It also does it when I come to a stop. When I come to a stop it will stay at a higher rpm than that of idle speed. It drives ok when on freeway but uses more petrol. I have changed the water & petrol pump but no luck
I bought it in April, so I don't know :(
did you ride this bike during the winter months with any problems?
×