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Discussion Starter #1
I am lost. My 2008 Honda rancher 420 is stalling. It drives good when it first starts up and drives fine. A few minutes into driving both the thermostat light and F1 lights illuminate and it stalls. It will not start back up until it cools down. But really it's not hot at all, stalls after a few minutes. The problems I am experiencing points to the fuel injector and fuel injector relay. I replaced both and still have the problem. Any help would be appreciated.
 

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check your pm.
 

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Is the tank venting?
 

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Discussion Starter #6
So I just started the quad up and it ran idle good for about 20 minutes. It then stalled. There was a small coolant puddle on the ground. It was leaking from a hose on the top right (looking at the front of quad) also. When I bought the quad used the previous owner advised he put a new OEM radiator on it because a stick went through the old one. Thank you
 

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So I just started the quad up and it ran idle good for about 20 minutes. It then stalled. There was a small coolant puddle on the ground. It was leaking from a hose on the top right (looking at the front of quad) also. When I bought the quad used the previous owner advised he put a new OEM radiator on it because a stick went throhg
 

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I have been reading some other forums that have similar problems. Is it possible it is the CDI box? If it was a cheap part I would just buy it but it's over $200
 

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  1. What is the PM

    What is the PM?
click your avatar pic on upper right, look for conversations ( thats what these idiots call a pm here now..lol ) yu'll find your pm's there.
 

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You need to list what model Rancher you have. What aftermarket mods are on it and we can go from there.
 

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Discussion Starter #11
You need to list what model Rancher you have. What aftermarket mods are on it and we can go from there.
It is a 2008. TRX420FE. Rancher.
No modifications but the previous owner stated he replaced the radiator due to a tree damaging the original. Thanks.
 

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When you say it is not hot when it stalls, how do you know this? Is it possible the prev owner ran it low on coolant and burned up the pump? Also you say the lights illuminate before it stalls?
 

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I am lost. My 2008 Honda rancher 420 is stalling. It drives good when it first starts up and drives fine. A few minutes into driving both the thermostat light and F1 lights illuminate and it stalls. It will not start back up until it cools down. But really it's not hot at all, stalls after a few minutes. The problems I am experiencing points to the fuel injector and fuel injector relay. I replaced both and still have the problem. Any help would be appreciated.
check the carburetor and make sure their is no trash in it and if that's not it then try to put see foam in it and see if it will eat the trash out of the carburetor
 

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check the carburetor and make sure their is no trash in it and if that's not it then try to put see foam in it and see if it will eat the trash out of the carburetor
damn bro, this is the second time you say check the carb on trx420's ?..TRX420's ARE FUEL INJECTED !!!, THEY HAVE A THROTTLE BODY !!!, please learn your machines b4 you post, thanks.
 

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damn bro, this is the second time you say check the carb on trx420's ?..TRX420's ARE FUEL INJECTED !!!, THEY HAVE A THROTTLE BODY !!!, please learn your machines b4 you post, thanks.
[/QUOTE
damn bro, this is the second time you say check the carb on trx420's ?..TRX420's ARE FUEL INJECTED !!!, THEY HAVE A THROTTLE BODY !!!, please learn your machines b4 you post, thanks.
it still has one so why are you being like that dang man all i am trying to do is help you but you want to get mad but okay and i know my machines think you and thank you for your time and you want to cuss at a kid that's real smart dude.
 

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@arowan,I wasn't cussing at you one time, I was pointing it out, that your telling members to check their carbs..when its not a carb on their machine !, certain atvs ( such as this one in this post ) has what is known as a throttle body, there is a big difference between a throttle body, and a carb !. even though they both mount to the intake side of the cylinder ?, they work very different !. one uses jets for fuel flow ( carb ) , other uses a fuel injector to send fuel into the cylinder ( throttle body ) with a fuel pump. and for the record ?, we dont allow curse words here, spec as a mod !!..lol.
 

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@arowan,I wasn't cussing at you one time, I was pointing it out, that your telling members to check their carbs..when its not a carb on their machine !, certain atvs ( such as this one in this post ) has what is known as a throttle body, there is a big difference between a throttle body, and a carb !. even though they both mount to the intake side of the cylinder ?, they work very different !. one uses jets for fuel flow ( carb ) , other uses a fuel injector to send fuel into the cylinder ( throttle body ) with a fuel pump. and for the record ?, we dont allow curse words here, spec as a mod !!..lol.
it still has a carburetor
 

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it still has a carburetor
your wrong bro, its not called a carb..its called throttle body. I am not going to argue with you, but if you keep calling it something its not ?, then I will keep calling you out on it, again, PLEASE READ UP ON ATV MODELS B4 YOU COMMENT !, TY :).
 

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@arowan,I wasn't cussing at you one time, I was pointing it out, that your telling members to check their carbs..when its not a carb on their machine !, certain atvs ( such as this one in this post ) has what is known as a throttle body, there is a big difference between a throttle body, and a carb !. even though they both mount to the intake side of the cylinder ?, they work very different !. one uses jets for fuel flow ( carb ) , other uses a fuel injector to send fuel into the cylinder ( throttle body ) with a fuel pump. and for the record ?, we dont allow curse words here, spec as a mod !!..lol.
it still has a carbur
your wrong bro, its not called a carb..its called throttle body. I am not going to argue with you, but if you keep calling it something its not ?, then I will keep calling you out on it, again, PLEASE READ UP ON ATV MODELS B4 YOU COMMENT !, TY :).
what do you think fuel injected means it still has a carburetor
 

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Wow shade this place sure did take a turn for the worst. This guy here is a genious. Im gunna go get in my clearly carbureted 2012 ram2500. Better pump the gas a few times. Hope it starts in this cold lol. My wife knows the difference between carb and fuel injection. Pretty sad.
 
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