R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 11-03-2006, 08:51 PM   #16
Tech Master
 
Turbine_au's Avatar
 
Join Date: Jan 2006
Location: SA
Posts: 1,340
Trader Rating: 6 (100%+)
Default

Once you've blown on it and reattached the line. Will the car run then?
__________________
It's mine: http://au.youtube.com/watch?v=usYhSWbmx6s
Turbine_au is offline   Reply With Quote
Old 11-03-2006, 09:07 PM   #17
Tech Adept
 
Join Date: Jun 2005
Location: Ontario, Los Angeles, Boston....
Posts: 184
Default

We assume you're using a starter box to turn the engine over at a good rate to start it.

If fuel isn't flowing without blowing through the pressure line then you have a pressure problem. You'll need to check the exhaust seals on the exhaust header, and the connection between the pipe and header ( a piece of silicone tube, or with the one piece pipe set up there is a silicone seal between the pipe and header) Those need to be examined to make sure there are no rips or tears anywhere.

Is the fuel tank seal on the fuel lid look good or is it worn or missing? Hopefully the fuel tank is okay, but you seem to build pressure okay when blowing in the pressure line so thats a good sign.

As mentioned earlier make sure the carb setting on the main mixture screw is set out enough and the base speed needle is set to make the carb rich to start. Also when you blew the fuel up to the carb you should be able to get it to bark a little if there's fuel at and in the carb to the spraybar.

Check the carb seal and tightness where it mates to the engine block intake. Make sure its tightened there. Since we don't know the status of the carb itself, can you find a similar carb to replace the present one to try and see if that works better? If you can it may help.

Let us know how you make out. Eventually the tips here will get it running for you. Airleaks are the usual cause of fuel flow problems.
__________________
Is Quebec leaving any time soon?
fossil is offline   Reply With Quote
Old 11-03-2006, 09:09 PM   #18
Tech Adept
 
Join Date: Jun 2005
Location: Ontario, Los Angeles, Boston....
Posts: 184
Default

Are the fuel line and pressure line okay and not slit or broken at their ends? that can be a problem and I've seen that happen to me quite easily.
__________________
Is Quebec leaving any time soon?
fossil is offline   Reply With Quote
Old 11-03-2006, 09:20 PM   #19
Tech Master
 
cdelong's Avatar
 
Join Date: Jul 2004
Location: The Sunshine State
Posts: 1,805
Trader Rating: 12 (100%+)
Default

It is possible that the seals in the needles are deteriorated. I have seen o-rings on the high end needle come apart and block the carb inlet.

Blowing on the pressure line may allow fuel past the blockage, but the vaccum of the engine is not strong enough to get past the blockage.
__________________
KYOSHO EVOLVA
35PLUS21
FUTABA 3PKS/KO PROPO
BYRON'S FUEL/TWISTER TIRES
cdelong is offline   Reply With Quote
Old 11-03-2006, 09:59 PM   #20
Tech Master
 
Join Date: Nov 2004
Location: Colorado
Posts: 1,383
Trader Rating: 74 (100%+)
Default

If using a starter box, make sure it's spinning the correct direction.

Looking from aft to front of the box, starter wheel should rotate forward.

This is a very common error.
Nitro-mech is offline   Reply With Quote
Old 11-05-2006, 10:57 AM   #21
Tech Adept
 
Join Date: Jun 2005
Location: Ontario, Los Angeles, Boston....
Posts: 184
Default

Running yet??
__________________
Is Quebec leaving any time soon?
fossil is offline   Reply With Quote
Old 11-05-2006, 05:41 PM   #22
Tech Elite
 
itchy b's Avatar
 
Join Date: Apr 2006
Location: In My Man Cave
Posts: 4,144
Trader Rating: 2 (100%+)
Default

also check to see if you have a blockage in your pipe by taking it off and blocking the stinger while you blow onto the end of the pipe.
if there is no air coming out of the nipple for your preasure line there is somthing blocking it
__________________
-Blitz-Rallyhawk-EX 1.5R-Xpress-P64 Tyrrell-Lotus79-Espirit VTA
EX1.5-SC10 4x4
itchy b is offline   Reply With Quote
Old 11-06-2006, 06:55 AM   #23
Tech Initiate
 
Join Date: Sep 2006
Location: Miami, Florida
Posts: 42
Default

Hello!

I had a similar problem with fuel not getting through the carb. with my HPI RS4 3. I had just bought a new O.S. CVR-X .18 engine and when I was doing my break-in, I noticed the fuel was not reaching the carb and the engine kept shutting down on me.

I checked everything for leaks and ended up buying a new primerless button tank from HPI RS4 2 racer tank.

I analysed the problem with the primer button; o-rings inside become hard and rupture overtime with the gas. This blocks the exit of fuel into the line and that is why the car was stalling on me.

Ever since I put the new tank in the problem has been fixed.

You have two options to try: 1- buy the same stock primer button tank for the RS4 3

or

2- Buy the primerless button tank for the RS4 2 racer.

It runs for about 17.00 U.S. bucks but it it worth it.

Good luck
Speedbang is offline   Reply With Quote
Old 11-15-2006, 07:18 PM   #24
Tech Rookie
 
Join Date: Nov 2006
Posts: 2
Default

I had the same problem with fuel not getting through the carb for my rc car.

I replaced the fuel tank, and problem fixed.

Thanks.
rcracing4life is offline   Reply With Quote
Old 11-15-2006, 09:17 PM   #25
Tech Fanatic
 
uniquexme's Avatar
 
Join Date: Feb 2006
Location: Sibu, Sarawak
Posts: 901
Trader Rating: 12 (100%+)
Send a message via MSN to uniquexme Send a message via Yahoo to uniquexme Send a message via Skype™ to uniquexme
Default

try to rich the HSN, very rich, then start the car. once it start, hold the throttle, lean slowly
uniquexme is offline   Reply With Quote
Old 11-29-2006, 02:01 PM   #26
Tech Initiate
 
Join Date: Aug 2006
Posts: 22
Default

Okay well I checked over everything and there is a slight rip in the purple thing that attaches the exhaust. Also there is fuel coming out from around the flywheel. What does that mean?
Mann2006 is offline   Reply With Quote
Old 11-29-2006, 02:28 PM   #27
Tech Adept
 
Join Date: Jun 2005
Location: Ontario, Los Angeles, Boston....
Posts: 184
Default

See post #17, first paragraph about exhaust seals.

Hopefully your last statement is true because it changes everything we've been trying to tell you how to resolve.

Fuel around the flywheel is probably a loose tolerance bearing or a bad bearing seal at the crankcase. This means there is fuel getting to the crankcase.

How do you get fuel in the crankcase at the bearing around the flywheel if you have no fuel getting to the carb??

Have you ever pulled the fuel line from the carb and tried to start this motor yet?? Does fuel spurt out of the line if you do this when you turn the motor over??

Sounds like you may have carb problems but not the type of problem of fuel not getting to the carb. You have flooding problems if what you're telling us now is true.

Change the seal or gasket that is ripped and try starting the motor again. If it still floods then you'll need to get that carb adjusted to base settings.

Anybody else with more suggestions?? Who's got a car/motor combo like his that can help??
__________________
Is Quebec leaving any time soon?
fossil is offline   Reply With Quote
Old 11-29-2006, 09:30 PM   #28
Tech Master
 
cdelong's Avatar
 
Join Date: Jul 2004
Location: The Sunshine State
Posts: 1,805
Trader Rating: 12 (100%+)
Default

is the darn glow plug any good?? we're all assuming you should know how to check this...... maybe not?

Try a new glowplug- something HOT!! MC-59 would probably be good.
__________________
KYOSHO EVOLVA
35PLUS21
FUTABA 3PKS/KO PROPO
BYRON'S FUEL/TWISTER TIRES
cdelong is offline   Reply With Quote
Old 11-30-2006, 05:45 AM   #29
Tech Initiate
 
Join Date: Aug 2006
Posts: 22
Default

I can only get fuel moving to the carb. if I blow on the pressure line. And then I see fuel coming from around the flywheel. I've also discovered that the exhaust gasket is worn badly and torn alot. The one that attaches to the motor. I'm not sure what kind of glow plut this is but it's what my hobbyshop told me to use. But it says it's for off road.

Quote:
Originally Posted by fossil
See post #17, first paragraph about exhaust seals.

Hopefully your last statement is true because it changes everything we've been trying to tell you how to resolve.

Fuel around the flywheel is probably a loose tolerance bearing or a bad bearing seal at the crankcase. This means there is fuel getting to the crankcase.

How do you get fuel in the crankcase at the bearing around the flywheel if you have no fuel getting to the carb??

Have you ever pulled the fuel line from the carb and tried to start this motor yet?? Does fuel spurt out of the line if you do this when you turn the motor over??

Sounds like you may have carb problems but not the type of problem of fuel not getting to the carb. You have flooding problems if what you're telling us now is true.

Change the seal or gasket that is ripped and try starting the motor again. If it still floods then you'll need to get that carb adjusted to base settings.

Anybody else with more suggestions?? Who's got a car/motor combo like his that can help??
Mann2006 is offline   Reply With Quote
Old 11-30-2006, 06:19 AM   #30
Tech Master
 
cdelong's Avatar
 
Join Date: Jul 2004
Location: The Sunshine State
Posts: 1,805
Trader Rating: 12 (100%+)
Default

I think the HPI RTR has a Novarossi knockoff engine- an old MT-12 type, but with HPI on the case.

1). Screw in the top end needle (the one that has the fuel line attached to it) all the way in till it bottoms out, then back it out 3 turns.

2). Open the carb all the way and hold it there.... screw in the low end needle (the one where the carb linkage attaches) all the way, then back it out 3 turns... now release the carb to it's idle position.

3). take the aircleaner off and look at the carb barrel....set the idle gap to about 1.0mm by turning the screw in or out.

4). Take the glow plug out and turn the car upside down.... rotate the flywheel to get all the excess fuel out of the engine.

5). Get a new MC-59 plug. Put the glow plug back in and fire it up!!

... and get a new exhaust gasket
__________________
KYOSHO EVOLVA
35PLUS21
FUTABA 3PKS/KO PROPO
BYRON'S FUEL/TWISTER TIRES
cdelong is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Converting Rotary Carb to Slide Carb? hrnts69 Nitro Off-Road 1 07-18-2008 12:29 PM
WTB 11L ROTARY CARB FOR .18TZ, HAVE NEW SLIDE CARB TO TRADE? SHAGGS R/C Items: Wanted to Buy 0 12-01-2006 03:34 PM
fuel wont go into carb tiger266 Nitro On-Road 9 07-27-2005 04:23 PM
Sirio .12 with Novarossie Carb -CX12 carb fit? au_Nightmare Onroad Nitro Engine Zone 10 09-25-2004 09:29 AM
Spitting fuel out of carb ottoman Onroad Nitro Engine Zone 1 04-25-2004 05:45 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 06:39 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net