2.5 Dies at half tank, performance drops

[bowtie4x4295]

Bought the daughter a T-Maxx 2.5, I have a Revo that runs great now that its tuned. I have replaced many of the T-Maxx parts but noting engine related. I did buy it used, have no Idea how much fuel has been through it. Here goes, Truck starts fine and runs, I usually have it rich. When it starts I try to get it up to temp to tune. Once tune gets close it runs reeally well for about 10 minutes or so, about half a tank. Suddendly performance begins to drop, temps start to drop, running very rich, fuel spitting from pipe. Now it is very hard to keep running, finally it dies. Checked temp after it died yesterday and it was only 99 degrees. The pipe is covered with fuel and its very hard to start after this occurs. If you wait a few minutes it will fire right up and the cycle begins again. I just noticed that the carb spring boot is torn, have one on order, can this possibly cause a tuning issue. Could a bad pipe cause any of this? Just trying to get it running right so the daughter and I can enjoy them together. Any thoughts or Ideas would be appreciated.

Thanks, Mike

 

[donf]

try swapping the glow plug and see if that helps.

 

[Phins Fan]

Possible airleak? Maybe you are good with a full tank but as the fuel gets eaten you have more area to loose some of your backpressure? Have you replaced the fuel lines, sealed the motor against airleaks? Dont really know just throwin around a couple ideas??

 

[2revo1maxx]

Is it a plastic pipe? It may be a worn engine.

 

[bowtie4x4295]

Yes it is a plastic pipe. Was thinking maybe a cracked pipe. Replaced glow plug and tried again. Was Very rich with tuning, after almost a full turn in it started running better, finally shifting and temps were getting up where they need to be. Ran the HSN all the way in to see where I was and turned out to be 2.5 out. Just thought that would be too lean, but was running good, no cutting out. While finally getting it close I flipped it over, now the ez start wont turn the engine. Pulled the plug and can move the engine fine. Moved the piston down, but ez wont turn. Relpaced battery, the ez motor is trying. Can see the motor try but no joy. Gotta either get the pull start or a tiger drive. Also the engine fells like it has good compression while moving piston by hand.

Thanks, Mike