bone1977

Looking for a little help with my Revo. I am having issues where once they engine gets up to operating temp it is dying during deceleration and hard breaking. When I pop the top off there is no fuel in the lines leading to the engine. I have replaced the fuel lines, pipe, and used the fuel tank rebuild kit. When I try to start her up again the fuel doesn't want to go, even when I cover the exhaust to create more pressure, but when I pop the line off of the carb it flows out no problem. During the engine break in period this did not seem to be a problem.

Any thoughts or suggestions? My local hobby store guys don't have much of a clue.

tommythecat

My Feedback: (2)

Have you checked your carb for obstructions. If you get a heavy build up of debris in the line just before the highspeed needle it can block the fuel flow.

I would remove the fuel line from the carb and turn the engine over while plugging the exhaust to see if it pumps fuel that way. If you cover the exhaust and turn the engine over with the fuel line off of the carb you should have fuel pouring out of t at a good rate. If you get fuel flowing nice, then I'd guess that whatever is blocking it is in the carb. If you don't get a steady flow of fuel then I'd guess you either have an airleak (would have to be pretty severe pressure leak to prevent flow completely) or else you have an obstruction somewhere that you are missing.

Just a couple guesses. Good luck.

bone1977

Popping the fuel line off the carb and checking was the first thing I did and it pumped out just fine. What is making me shake my head is that its not a constant problem. I could run through half the tank just fine, then all of a sudden it dies 2-3 times in a row, then runs fine again for several more minutes. I'm debating on rebuilding the carb, but its not something I feel 100% comfortable with.

Is it possible that the engine might be running a little on the hot side and causing some sort of pressure issue?

tommythecat

My Feedback: (2)

That would be odd. Did you check your pipe coupler for splits. if the coupler splits it may spread open at high temps and cause a lack of pressure in the tuned pipe, causing reduced pressure to the fuel system. Just another guess.

TKTJUMPERS

How old is your engine?

stilllost

My Feedback: (3)

i bet the oring isn't seating propperly. i ssame kind of problem found out that the oring wasn't seasting right called traxxas. which there cust. service has gone down the hill. at first b1tched that oh well buy a rebuild kit. i saaid nope car is brand new not even 6 tanks ran thru after break in and now this. his exact words oh well. must been soome kid mad that they give a jato cuz he worx there. anywho i then spoke to his supervisor about his attitude and he said sorry tank is in the mail. i get THE BRAND NEW TANK AND IT'S CRACKED AT THE SEEMS AND THE ORING WAS DOIN THE DAM THING. went to the parts house and bought me some oring's therre and did it ever make a difference.

Delta_Dude12

Yep I got the same thing happenin w/ the o-ring so I bought the rebuild kit and now it work fine.