2003 yamaha rx-1 wont start please help...

[superfan75]

The TPS switch will cause no starting, backfiring, running on 3,2 or 1 cylinder. I went through hell with my sled last year trying to keep it running on 4 cylinders. I had hard starting and kept a car battery in my truck to boost it to get it going on cold mornings. I had to head back home on 2 occasions when it just wouldn't go. I cleaned my carbs 5 or 6 times. I was using about 1/4 of a can of Sea Foam per tank of fuel trying to further clean the carbs and get rid of carbon. I bypassed the TORS. I replaced the battery and the fuel pumps. All this had no effect really but I was hopeful every ride that I had solved the problem. This year on the first ride I barely got it started. It was hard to restart all day. It ran on 2 or 3 cylinders until it got a couple of miles down the trail. I was ready to just give up sledding. I left it on the trailer overnight and when I went to put it in the garage the next day, the check engine icon and blinking orange light came on. This was the first time that this happened. The code was for a TPS problem. I opened the switch and found the mechanism full of crap. I cleaned and lubricated the switch and put it back together. It made a day and night difference. Sled fires right up and idles so smooth that the primary rattle is all but gone. It restarts without giving a little bit of throttle. It never did that even when new. Give it a try. You will probably need small vise grips to break the Phillips screws loose. I'm going to replace with allen bolts like I did with the float bowls and will give the switch a spray a couple of times a season.

I may clean and lube mine just for peace of mind. Thanx for the great tip.

 

[low flying missile]

I think everyone will have the problem eventually. I priced the switch using the Port Yamaha microfiche and its $188.00. I was able to get mine working again with tuner cleaner. It had failed to the point of throwing a code. I would much rather have cleaned it before it showed the code as I don't completely trust the fix to be permanent now.

 

[Shawn2003]

Well boys we found the problem so after just putting the plugs in the coil and turning it over to see for spark and even putting my spark tester on them they showed they had spark but once tested with a tester at Yamaha there were two bad coils and the real crapy part they were just put in three months ago and the company says sorry its electrical sh*t happens. Not cool but after all the headaches its back in action

Again thanks to all of you guys who helped me with trying to find the problem and keeping the fire burning two thumbs up to all of yous this site Totally kicks as$

 

[superfan75]

That's good you got it going anyways. I had a problem like that with my Grizzly last year. It always had a stalling issue even though its fuel injected. I modified the airbox and added a fuel controller, but the problem never went away. I checked everything I could think of. I checked all the electrical connections, grounds, spark, stator, fuel, you name it and I couldn't see what was wrong. It finally wouldn't run all of a sudden one day and I really scratched my head. I checked for spark again and nothing. Just by accident once while trying to see why there wasn't spark I turned the engine over while the plug wasn't grounded a spark jumped from the bottom of the ground strap to the engine instead of inside the plug where its supposed to be. The plug looked fine, but it was bad and when I through a new plug in it fired right up. Not only does it run now, but it hasn't stalled once since. I felt silly in a way not trying a new plug after all the work I did trying to fix it, but the plug looked fine and I never thought there was anything wrong with it. I guess my point is sometimes the answer is right in front of us and we just need to see the obvious. Its experiences like this that we can learn from that make us better at diagnosing problems in the future and this site is AWESOME !!

 

[ghost rider]

Heck ya... really bad fuel will not fire... at all.

X2