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Old 07-09-2009, 02:28 PM   #1
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Default A leak somewhere or what?

Have a problem that is driving me nuts!

I can drive around on the track and the car is running fine and all of a sudden it gets a major bog and goes rich. sometimes the engine dies and sometimes I let of and it goes back to normal. If I keep it pinned when it bogs it doesn´t clear up it just keeps bogging. Then it´s fine for a while and then.....
It doesn´t happen at the same place on the track or at certain intervalls, it just comes on out of the blue...
I have tried to drive differently and not blip the throttle so much thinking I´m loading it with fuel and it can´t handle it when I go full throttle but there´s no difference...

I have tried the following:

--Three guys have tried to tune the engine without luck.
--Changed engine, same problem.
--Both engines are sealed, 1st engine 2 gallons, 2nd engine brand new.
--Changed fuel and pressure lines.
--Changed clutch, clutchbell and bearings.
--Changed airfilter and inspected everything connected to the filter.
--Changed fuelfilter.
--Changed glowplug.
--New gaskets for the pipe.
--Changed to a new gallon of fuel.
--Nothing is dragging, driveline is perfect, bearings perfect.

I´ve also tried cursing, jumping up&down and kicking in the dirt but nothing helps!

I´m thinking it could be a leaking tank but i`m not sure how to check it? There´s no visual signs of leakage but...

WHAT SHOULD I DO???
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Old 07-09-2009, 02:34 PM   #2
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There is a video on youtube from a guy called squirrelod who runs through a number of things. One of them is finding and fixing engine leaks.
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Old 07-09-2009, 02:38 PM   #3
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Have you changed the tank yet. I had a tank that only had about a quart of fuel through it and my engine would run for 1-2 mins and then just die like someone turned the switch off. I did about what you did above and it ended up being the fuel tank. Especially if you change engines and the problem is still there. Try the tank.
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Old 07-09-2009, 02:40 PM   #4
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Originally Posted by Garet Jax View Post
There is a video on youtube from a guy called squirrelod who runs through a number of things. One of them is finding and fixing engine leaks.
Yea I´ve looked at some of his videos before, good idea, thanks.
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Old 07-09-2009, 02:42 PM   #5
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Have you changed the tank yet. I had a tank that only had about a quart of fuel through it and my engine would run for 1-2 mins and then just die like someone turned the switch off. I did about what you did above and it ended up being the fuel tank. Especially if you change engines and the problem is still there. Try the tank.
Haven´t changed tank yet cause none of my friends drives a MP9 so I would have to order one and it seemed easier to just test it for leaks.

Man I´m frustrated right now.....
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Old 07-09-2009, 04:47 PM   #6
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check nothing is in your pipe, I had a gasket piece stuck once, gave me nightmares
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Old 07-09-2009, 05:19 PM   #7
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check nothing is in your pipe, I had a gasket piece stuck once, gave me nightmares
Good idea, gonna check the pipe.

Thanks
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Old 07-09-2009, 06:33 PM   #8
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Pull your tank out and drain the fuel out. Clean off the tank. With new lengths of fuel line on put the tank under water while keeping the ends of the fuel line out of the water. Lightly blow into the pressure line and look in the water for bubbles. If air bubbles show up you have a leak right there.
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Old 07-09-2009, 06:49 PM   #9
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Pull your tank out and drain the fuel out. Clean off the tank. With new lengths of fuel line on put the tank under water while keeping the ends of the fuel line out of the water. Lightly blow into the pressure line and look in the water for bubbles. If air bubbles show up you have a leak right there.
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Old 07-09-2009, 07:21 PM   #10
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sounds like a tank leak, and a lean bog not rich!
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Old 07-09-2009, 07:24 PM   #11
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ok place the out fuel line to the pressure inlet with the tank empty, place it under water and squeeze it. Look for bubbles and there is your
leak !!!'
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Old 07-09-2009, 09:16 PM   #12
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Thanks guys for your help.

I´m going to try the underwaterthing and let you know if that´s the problem.

Thanks again...
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Old 07-09-2009, 10:19 PM   #13
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HEY! Where'd your Associated go?!
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Old 07-10-2009, 04:13 AM   #14
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HEY! Where'd your Associated go?!
Hahaha I´m busted...

History:

Used to race 1/8 gas and 1/10 2wd & 4 wd electrics ALOT back in the days and was fairly successful but I quit about 12 years ago and then started racing this year again, can´t belive I was stupid enough to quit back then cause this is the best hobby ever.

I´m thinking since I´ve been out of the game for so long I would try out the different brands this season and then find a car I feel comfortable with and stick with it next season and compete as much as possible.

Have tried the RC8, Xray, MP9 now and plan to test the MBX6 and Losi soon.
So SkarTisu it seems I have bit of work to do before I decide but it´s so much fun doing it.
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Old 07-10-2009, 05:21 AM   #15
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don't forget the hotbodies D8 its nice you'll like it a lot....or at least I do!!
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