My Tmaxx is runny really bad. The other day I couldn't get it to run right. I spent a lot of time tunning it, and it would seem fine. Then it would start to run poorly again. It seemed to bog down, and if I gave it full throttle it would stall. I could always start it right back up and I'd go through the same process of tuning it and running into these problems again. I don't know if it's time to rebuild the engine or not. Also, the engine is discolored and I was told by someone that is a sign of the engine running too lean and I definitely need to rebuild it. I don't mind rebuilding if I have to, but I just want to make sure before I buy any parts. Thanks everyone.
P.S. I've ran over 2 gallons through it so far if that helps with knowing if a rebuild is needed.
How man turns out are your setting?
How is the compression? Turn the flywheel by hand it should take good effort to turn over by hand.
Running an engine to lean will make seem to run out of fuel. This is not good for the engine.
If your idle is good. Set the high speed needle out to 2 3/4. And begin from there. Your engine should emit a small stream of smoke while it is at top speed. Once it idles for a few seconds it should emit a large puff of smoke for a few seconds.
One Test to help determine if you are running to lean is to run the truck awhile then place a drop of water on the head. If it begins to boil and evaporate as soon as it hits the head. You are way to lean. It should take a few seconds for the water to evaporate without boiling.
Running an engine to lean is one sure way to destory it quickly.
excuse me while I pass some gas
That is a great tip, but we must remember that Traxxas engines run much hotter than average engines, so the water drop would boil away fairly quick...what kind of fuel are you using?? some fuels will form a residue inside the engine, and this will make the engine run hotter..also, have you run your tmaxx through water and gotten some on the engine? this will warp some parts on the engine,,which will cause it to perform like doodoo....what % nitro fuel are you using? if you are using a high nitro fuel and it causes the residue stated earlier, this will serioulsy cause some performance problems...
Thanks for all the tips guys. Unfortunately, nothing worked. No matter what I did, it still ran ****py. I've been using blue thunder fuel (20%). It has just over three gallons and I guess it's time for a rebuild. I'm more than likely going to port it, but I am wondering if I have to break in the new engine first? Or can I port it first? Thanks.