You might also hear popping sounds or see a flame at the end of the exhaust caused by heat in the exhaust system igniting the unburnt fuel near the tailpipe. Sorry but, if it's new did you adjust the idle? http://www.bluetraxx.com/forums/yampresent/72484-bog-zip-tie-o-ring-mod-you.html, Yamaha YFM350 Raptor/Warrior ('87-Present). But after reading several posts on other sites, I have come to the conclusion that it may be eletrical. http://www.eskimo.com/~daddog/repair/tps/index.htm. What other electronics could have been damaged? its not the l/l choke thats on the left side of atv. Unusual surges while accelerating Each of these could be signs that your throttle position sensor isn't working correctly. Out for 2011can't wait to get back at it in 2012!!! Keep reading, and Ill demonstrate how to replace the throttle position sensor. you might have to bend the probes slightly. The best course of action is to take your vehicle to a trained technician who can inspect it and install the necessary replacement part. These jerks can be experienced during hard acceleration or when under moderate load. The sensor has several issues over time. i have read about trail tech making something to fix this.. has any1 tried this, experienced the same problem. Take your automobile to a repair shop if this light appears on the dashboard so they can inspect it and figure out whats wrong. By using a screwdriver to unfasten the bolts, you may pull out the air intake duct and remove it. Turns out the throttle plate, aka slide, can go in two ways. A malfunctioning throttle position sensor might have many different origins, and it can also have many different symptoms. Cheers, Jon, well i finnally fixed it i think. Your fuel management system could fluctuate between using the right amount of gasoline and utilizing too much since it could occasionally produce erroneous data. Remember that after you replace a throttle position sensor or the throttle body, you need to reprogram/recalculate the throttle angle. Corrosion between the electrical connectors might result in resistance, which can lead to problems. Look for any dark spots on the throttle body that could have carbon or other debris by visually inspecting it. I had the TPS eliminator on mine. symptoms of a bad throttle position sensor. guess not. As you rotate it you change the values and even a 1mm difference is huge at low RPM. how did everybody else do it? The term idling refers to the operation of the engine when the vehicle is not actually moving. If you unplug it the way i understand it is the bikes CDI will assume the carb is at WOT all the time and adjust the timing accordingly. Open to Banshees, Raptors, Blasters, and others for recreational riding and racing. i'm so doing it. A throttle position sensors job is to monitor how much air and fuel your cars engine needs to operate at peak efficiency. QUOTE (quadboy-55 @ Dec 1 2009, 04:38 PM), i was thinking about getting a Sparks TPS bypass aswell, i heard its 1HP gained. Content on yfzcentral.com is generated by its users. The quantity of gas to inject into the engine at any one time is precisely determined by the data that enables the throttle position sensor to monitor air entering the engine. Since your engine doesn't idle correctly, I'm going to have to say that you didn't do the TPS adjustment at all by the book. : http://www.yamaha-motor-europe.com/community/service/manuals.jsp, no under the carb diagram its part #65. i was mistaken about the "tps sensor itself" was not removed or adjusted. You mentioned Trail Tech, I see the rectifier on sale at 29.95, but you also mention the Stator being rewound. What happens is that the throttle in the throttle valve may close automatically, and if the driver presses the accelerator pedal too hard, the valve suddenly opens and gives the car a small speed boost. Fix whatever you removed as soon as possible and tighten the nuts holding it in place. The tps is where the electrical connection goes into the top of the carb, and according to the book you turn it clockwise or counterclockwise to adjust your throttle position. just adjusted tps still no fire gonna pull carb and double check slide will update with what i find thanks everyone for the responses. All TP sensors have a potentiometer that is used to measure the throttle flap position. Content on bluetraxx.com is generated by its users. You just said that the TPS was never moved or adjusted. The problem ended up being a freid TORS -throttle over ride safety - switch up on the handlebars. You should hear a distinct clip sound as you secure the electrical connector. They tried everything even on the dyno the bike showed everything to work perfectly. Symptoms Of A Bad Throttle Position Sensor (TPS) Beside the check engine light (CEL) being on and driving you nuts, your Chevy or GMC pick up (or SUV or van) may be experiencing one or several of the following symptoms: TPS diagnostic trouble codes (DTCs) stored in the vehicle's computer's memory. A bad throttle position sensor can lead to incorrect shifting in an automatic gearbox by preventing enough speed changes. Ill demonstrate how to identify and fix a throttle body in a car or truck. Because the engine control module is unable to properly regulate the fuel mixture or ignition timing when a TPS is malfunctioning, the engine may surge, hesitate, stall, or cause a check engine warning light to illuminate. Yeah I have the same problem. How to determine if your throttle position sensor is broken is now the problem. If you also notice that the car judders when accelerating, this can be due to a damaged throttle position sensor. I honestly didn't feel a difference between the three settings. On the other hand, if the throttle position sensor malfunctions, you may have performance issues, low fuel efficiency, and erratic idling, to mention a few indications of a malfunctioning throttle position sensor. This will save you tons of anger mgmt. Gently loosen them so you may remove them. Do yourself a favor and get your idle speed and mixture set perfectly before you attempt to set the TPS. There are those that will argue that it makes a difference. Hey, how much did the rectifier cost? If you don't know how, get a shop manual from here. now i cant get it to start and idle and is backfiring real bad i did have it started for a minute and all it did was backfire. Your cars idle will surge or the engine wont keep a constant idle due to a malfunctioning throttle pedal position sensor. It's not a specific piston, it's any piston over 13.5:1 compression ratio. sat overnight, checked basic..had full gas. In this situation, a qualified technician is most suited to complete this work. Each time the ignition is started, the ECU sends a 5V reference signal to each of its analog sensors. bluetraxx.com is an independent Yamaha enthusiast website owned and operated by VerticalScope Inc. the thing i'm having problem with is that if the tps needs to be connected to a power supply then i can't check it with the probes. TPS Bypass Plug, Yamaha 2004-2011 YFZ 450. Inaccurate data will be sent to the ECU by a throttle position sensor is broken. An electronic control unit (ECU) by Specious / CC BY-SA 3.0. If you don't have lights and want to fix the problem you will need to contact Trailtech. I race mx so having the throttle read at only 0% and 100% isn't really a big deal. For a better experience, please enable JavaScript in your browser before proceeding. The check engine light will often come on to let you know that the TPS has failed. Using the appropriate socket set as well as the ratchet handle from the mechanic toolbox, loosen the bolts securing the throttle body to the car. The throttle position sensor transmits throttle position data to the engine control module (ECM), and this information helps determine how much fuel should be injected into the engine at the right time. You might need to manually set the sensor depending on your car, such as the old Ford Ranger and the Chevrolet Silverado, Tahoe, and Silverado. If you have a newer car with an electric throttle body, the throttle position sensor is most likely integrated into the throttle body and cant be replaced separately. Now when i have the settings on ohm 2000 i get .55 on the multimeter. I should re-phrase my prevous post.. the bike will not idle (ever). Your car will go into a safe mode that prevents rapid acceleration and speed increases and results in engine power loss if your throttle position sensor isnt working properly. Unless it is only on there for emissions reasons I can't imagine yamaha would have gone to all the trouble of creating a CDI with the ability to change ignition timing for no performance gain. Rough Idling #2. The Fora platform includes forum software by XenForo. What we are finding with the YFZ is that, if the bike does not have a load on the electrical system, the OEM regulator/rectifier has trouble regulating the DC voltage in the range it needs to be in for the CDI. Its not too difficult to remove this electrical connection. Of course it needed rejetted after a few mods before riding it. Inside the throttle position sensor by The RedBurn / CC BY-SA 4.0. When it reads the throttle at 100% open, the timing is slightly retarded to account for the increase in air/fuel. What did you finally get to? Using a third party parts fiche as a service guide is, well, not wise. The throttle position sensor provides a reading to the ECU, just as it does when the ECU calculates fuel mixes to allow for precise throttle adjustment of the gearbox. Not sayint thats not your problem but maybe you can find out without spending the cash. If this information is faulty, there might also be a problem with your automatic transmissions shiftings. rode over the weekend and the bike was ripping :hey: :tup: I'll check the rectifier voltage when I can get the time to work on it. Back when a 2006 YFZ450 was new, it retailed for $6999 MSRP ($7249 MSRP for the SE model). if you do the tps bypass without it you wont hurt anything but if you do the tps bypass with a higher compression motor you will feel the difference. If the throttle position sensor were broken, it wouldnt be able to transmit all of the information to the ECU. Is it worth it. Your sensors measurements are not stable, which results in a surging feeling. This part has to be changed the moment it begins to malfunction. You may experience performance troubles, poor fuel efficiency, and unpredictable idling, to name a few symptoms, if the throttle position sensor isnt working properly. will just "looping" it to bypass it resolve the issue like on the old blasters clutches? The location of the throttle and how rapidly it opens and closes are relayed to the engine control module, and the computer utilizes this information, among other things, to determine the timing of the spark plugs and the amount of gasoline pumped into the engine. After that, remove any remaining obstructions to the throttle body. Problems might arise while shifting gears or adjusting the base ignition timing. While you press the accelerator pedal or when the engine is idle, it wont move. yfzcentral.com is an independent Yamaha enthusiast website owned and operated by VerticalScope Inc. For a better experience, please enable JavaScript in your browser before proceeding. other then that it runs fine Would rejetting take care of that or something else? One possible thing that causes this is that the TPS is continuously sending bad readings to the ECU. If there is not enough air or gasoline, the vehicle will not accelerate quickly enough. These operations are affected when a bad throttle position sensor feeds erroneous data to the car's computer because of which the: ***8226;Engine Malfunction Indicator Light (MIL) is turned on . The ECU receives a reading from the throttle position sensor, exactly as it does for the ECU to calculate fuel mixtures so that the gearbox may be accurately adjusted with the throttle arrangement. (is there only a computer, relays, etc). I think you are referring to the engine idle speed adjuster.. until your idle speed is set correctly you will not get the right voltage at the TPS. Do not wait until you have indications of a malfunctioning throttle position sensor. The Fora platform includes forum software by XenForo. so i made adjustments to the tps on the settings that you see in the picture. Read on. After realizing the TPS wires were pulled out of the sensor, he took the sensor apart, re soldered the wires in place, made sure no contacts were touching each other and put the TPS back togethor and on the carb. He twisted his carb to access the jets and it yanked the TPS wires out. The moment it begins to malfunction erroneous data moment it begins to malfunction.55 on the throttle at %! Feel a difference any dark spots on the old Blasters clutches the vehicle will not accelerate enough. A 2006 YFZ450 was new, it wouldnt be able to transmit all of the engine wont keep a idle. When accelerating, this can be experienced during hard acceleration or when the vehicle is not actually moving truck. If it 's new did you adjust the idle new, it move... 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