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engine wont sustain running!!

engine wont sustain running!!

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Old 06-22-2009, 10:41 AM
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Exclamation engine wont sustain running!!

so got my car running today but i had to put fuel directly into the air filter hole into the carb. priming wouldn't work. and then i would have to keep throttling it to keep it running. what is wrong with this!
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Old 06-22-2009, 10:41 AM
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Idle is too low.
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Old 06-22-2009, 10:44 AM
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Could be too rich some where -
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Old 06-22-2009, 11:08 AM
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If it starts if he pours fuel into the carb, then it sounds like it is not getting any fuel on the bottom.

Check your Idle gap, Pull full line from carb and make sure fuel is getting to the carb while turning over the motor. This will also check backflow pressure from the line on the pipe.

If you think it is too rich, prime it good then remove the fuel line to carb and try to turn it over. If it does start like this and then dies then it is getting to much fuel.

You could always reset all needles to factory and start there.


Hope this helps!
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Old 06-22-2009, 12:53 PM
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Originally Posted by scwrod View Post
If it starts if he pours fuel into the carb, then it sounds like it is not getting any fuel on the bottom.

Check your Idle gap, Pull full line from carb and make sure fuel is getting to the carb while turning over the motor. This will also check backflow pressure from the line on the pipe.

If you think it is too rich, prime it good then remove the fuel line to carb and try to turn it over. If it does start like this and then dies then it is getting to much fuel.

You could always reset all needles to factory and start there.


Hope this helps!
just called traxxas and they said that my carberator body was bad
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Old 06-22-2009, 01:05 PM
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Originally Posted by traxxasman104 View Post
just called traxxas and they said that my carberator body was bad
Did you start leaning the LSN?
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Old 06-22-2009, 02:16 PM
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how do they know the body is bad over the phone ? Its most likely your tune.
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Old 06-22-2009, 02:17 PM
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Originally Posted by roadracer43 View Post
how do they know the body is bad over the phone ?
EXACTLY
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Old 06-22-2009, 02:57 PM
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Originally Posted by losi_racer View Post
EXACTLY
because the housing for the high speed needle is strippde
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Old 06-22-2009, 04:40 PM
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In your initial post you never mentioned it being stripped. Is that the problem then ?
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Old 06-22-2009, 04:46 PM
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No expert but it almost sounded like he was getting air into the intake at some point - wouldn't a stripped idle screw do just that? No prime in any system usually means just such a thing - you sucking air somewhere...
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Old 06-23-2009, 06:50 AM
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Originally Posted by roadracer43 View Post
In your initial post you never mentioned it being stripped. Is that the problem then ?
yes because they said i had a blockadge and i needed to take the highsppeed off and when i did it the hole housing had come off with it and the carb body was stripped and that was where the air was leaking in or out
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Old 06-23-2009, 07:08 AM
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WHAT? ? ? I would take it to my LHS for a opnion - that part dont easliy strip.
I just think as you were turning to get the needle out the whole thing come lose. Tighten it back up.

Something dont sound right

When I get a engine - I crank the part that hold the nipple down and never heard of one stripping

hum

A blockage from what clumpy fuel ? ? ?

Over the phone huh?
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Old 06-23-2009, 08:37 AM
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Sorry if sound irrelevant, but is it a trx 2.5R engine?

Last edited by orangbaligila; 06-23-2009 at 08:39 AM. Reason: forgot the R
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