Honda ATV Forum banner

1 - 20 of 20 Posts

Registered
Joined
7 Posts
Discussion Starter #1
Hello! I have a 2007 Honda 420. Ran fine last week now to starts just fine but will not throttle up. After running slow about 50 yards it just dies out. Checked the fuel filter. Was not dirty. Fuel flows freely out of petcock on reserve and run. Any feed back would be greatly appreciated! Thanks !
 

Premium Member
Joined
3,538 Posts
Do you ride it much?When was last PM done?
Try Emptying the fuel tank; change oil; check/change spark plug with OEM. Get fresh no-ethanol premium and mix in some seafoam brand fuel system cleaner. You may have to ride it for 20-30 minutes to degunk the fuel system.
 

Registered
Joined
7 Posts
Discussion Starter #3
Thank you ! I ride once or twice a week. Have tried all that you have listed. Even inspected the fuel pump and filter. The F1 light flashed when is cold and even when it鈥檚 warm it will flash if too much throttle is given and then bike dies or runs badly.
 

Registered
Joined
8,301 Posts
if you have too much sea foam in tank it will cause running issue's

same if the fuel is bad, when you drained the fuel tank, did you by chance save it?
if so, pour it into a clear container and see if any water is in it>
maybe you bought bad fuel some place?
also, how many miles/hours on motor?
any motor work ever done to it, or mods?
 

Registered
Joined
7 Posts
Discussion Starter #5
No mods done at all. Someone told me maybe the O 2 sensor ? Like I said rode it last Monday and it ran fine. Saturday started running bad and the F1 light and coolant light come on when it鈥檚 cold or if you give it too much throttle. Changed plug made no difference. New gas and checked fuel filter. Checked petcock gas flows nicely.
 

Registered
Joined
27 Posts
Hello! I have a 2007 Honda 420. Ran fine last week now to starts just fine but will not throttle up. After running slow about 50 yards it just dies out. Checked the fuel filter. Was not dirty. Fuel flows freely out of petcock on reserve and run. Any feed back would be greatly appreciated! Thanks !
try to adjust the carburetor
 

Super Moderator
Joined
36,812 Posts
try to adjust the carburetor
HAHA..it doesn't have a carb bro ?..ITS FUEL INJECTED !! ( throttle body )鈥.I see your posting a lot, but your not posting correct info ?, but hats off to ya for trying !.
 

Super Moderator
Joined
5,031 Posts
Have you checked compression and timing? If the timing is out it may run fine for several yards as the choke (fuel enrichment) will be pumping excess fuel in until the CDI (ECU) tells the injector not to.

I assume you've checked fault diagnosis in the factory service manual?
 

Registered
Joined
7 Posts
Discussion Starter #11
Would just like to say thanks to every that helped me out with great comments and direction!! And to let everyone know the fuel pump was not putting out the right psi. 30 psi is the magic number just Incase you want to know. And even if it鈥檚 3 to 4 psi lower it can cause the problem i was having. changing the fuel filter to the vertical style Helps in most cases and keeps the filter off the bottom. But not always. Thanks again everyone! Greatly appreciated
 

Super Moderator
Joined
36,812 Posts
Would just like to say thanks to every that helped me out with great comments and direction!! And to let everyone know the fuel pump was not putting out the right psi. 30 psi is the magic number just Incase you want to know. And even if it鈥檚 3 to 4 psi lower it can cause the problem i was having. changing the fuel filter to the vertical style Helps in most cases and keeps the filter off the bottom. But not always. Thanks again everyone! Greatly appreciated
guessing you got it fixed ?...if so ?, good deal !.
 

Registered
Joined
7 Posts
Discussion Starter #13
Yes got it running this evening! Nothing gets fixed if you don鈥檛 try. Have to keep on getting it!
 

Super Moderator
Joined
36,812 Posts
Yes got it running this evening! Nothing gets fixed if you don鈥檛 try. Have to keep on getting it!
yep, been doing this for 28 years, it kinda grows on ya !..lol.
 

Premium Member
Joined
3,538 Posts
Yes got it running this evening! Nothing gets fixed if you don鈥檛 try. Have to keep on getting it!
Hey an ATV of the Month candidate?!
 

Registered
Joined
27 Posts
HAHA..it doesn't have a carb bro ?..ITS FUEL INJECTED !! ( throttle body )鈥.I see your posting a lot, but your not posting correct info ?, but hats off to ya for trying !.
why do you have a problem with me and all i am trying to do is help but you want to have the biggest attitude.
 

Registered
Joined
7 Posts
Discussion Starter #17
Not really sure what your referring to or even if your referring to my comments? But I don鈥檛 have any attitude with anyone here. I thanked everyone for the help and posted what I found out to help others with this kind of problem.
 

Super Moderator
Joined
36,812 Posts
not you its to shadetree
as I told you in pm, if you post something wrong ? ( like you have done in this thread ) , then I will call you out on it. he clearly has a fuel injection atv, and you told him to check his carb ^^^. twice I have seen you tell a member this, please read up on members machines before commenting , this way, you will not only give that poster some help ?, but the correct help !, thats all I was trying to do towards you, dont take it personal :).
 

Premium Member
Joined
3,538 Posts
why do you have a problem with me and all i am trying to do is help but you want to have the biggest attitude.
Hey @arowan we see you鈥檙e trying to help鈥攄on鈥檛 give up. The more seasoned members here have checked me before鈥擲hadetree with me with FI systems, too lol plus CDI applications.

Consider when people describe their probs, seek out the service manuals. Most times the new folks don鈥檛 know where they are or what to look for and you can look forward a lil for them鈥攔ead through the diagnostics and see if you See something they don鈥檛.
 
1 - 20 of 20 Posts
Top