3.3 tmax LOST TUNE!!

[beentryin]

i have a 3.3 tmaxx yesterday ran perfect,had it tuned to were it ran around 230 and couldnt keep it shinny side up.drained gas ran the motor empty,and put it away like alway get it out today,fuel it up and start it like always,run it around little to warm it up.and it starts acting rich.since it was hott out yesterday,i leaned it a 1/8th.then run it a few high speed passes and it started doing the wah wah wah bog.set it back to factory settings and fires right up,leaned it a few 1/8 turn just gets worse and just wah wah boggs,but will fire up every time i pull the starter and idle great the motor has had about a gallon and a half ran thru it.I'm so frustrated right now felt like slamming it after two tanks of tuning and still nothing

 

[Stroytika]

was it doing the wah wah wah bogg when you squeeze the trigger? if thats the case then my best guess would be that there is an issue with your return pressure line, and that as you rev up theres no back pressure going from your pipe to your tank, cause it to lean out and die. thats my best guess.
Also, keep in mind that the colder it is, the richer you want to be. think of it like this: cold air is dense, so you want more fuel for more air. hot air is not so dense, so you need less fuel for less air.

 

[beentryin]

yeah it does it when i hit the throttle wide open i can ease on to it and it will slowly take throttle till i punch it then it just bogs.and my fuel tank is wet on the outside but it was like that when it ran good?

 

[Stroytika]

your fuel tank is leaking air then most likely. I can't say i'm an expert, but if i were in your shoes i would closely inspect my pressure line, and my fuel tank. there are a few test you can do to check your fuel tank to see if its not sealing. if thats the case you will need this from you LHS
http://www3.towerhobbies.com/cgi-bin/WTI0001P?I=LXLMG9&P=8
i would at the same time replace the pressure line from the pipe to the tank.

If you want to check the tank to see if its leaking, pull it off the truck, empty all fuel out of it, and connect a fuel line to the pressure side and the fuel side. then submerge the tank in a sink full of water. while blocking one line with your thumb, blow into the other line. if you see bubbles come out, then you need to rebuild the tank.

 

[beentryin]

well took off the fuel tank it had a tiny bubble come out tightened the cap screw.put in new glow plug.and it still bogged and can't give it over half throttle .and eventually got one high speed pass out of it and went back to bogging.guess I'm going to tear the carb apart to see if its clogged or something

 

[beentryin]

well i tore the whole motor apart,even the carb and soked it all in alcohol cleaned it well and reassembled it and itll now start and take throttle,now i just got to retune it i think it had some trash in the carb.thanks for all suggestions