Originally Posted by
fievel
I had a runaway buggy last week and when i arrived at the buggy sometime later(this thing is fast) the buggy was upside down going at full throttle. I killed the engine and let it rest for a day. The engine is a 3R, i took it apart and inspected the engine as best i could. everything seems to be fine. i took it out to run it today and it actually runs a bit rough but it runs. the one thing i did notice is that no matter my tuning it seems that the high end is limit-less. if i richen the mixture it goes OK then if i lean it out an hour it goes incredibly fast but with an extremely high pitched rev. i know this is bad, what would you guys do next? i am trying to check for an air leak cause the engine sounds kinda funny when idling, i can hear what i think is air being sucked into the engine(its much louder then before) i just don't know where its coming from. thank you for your time.
I take my engines completely out of the car. hook 3 feet of hose to fuel inlet, put fingers over carb inlet and exhaust outlet. then with the whole engine under water blow like hell into the tubing and watch for air leaks. Air coming out from the front bearing is pretty much standard. Not alot but some. chances are your air leak is the hsn seal. you can make all the seals out of fuel tubing. Grizz will probably chime in when he reads this. I use his method until I can get some from massive mods. Do not waste your money buying the regular seals get the massive mods ones. they are nitrile and last forever. and actually grizz's home fix is also a solid way to go. But before you go replacing everything find all the leaks.