F4i fuel problem

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F4i fuel problem - HELP

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F4i fuel problem - HELP - 10/18/2005 8:40:59 PM

smokediver576

Posts: 21
Joined: 10/2/2005
Status: offline

Just got back from four outstanding days riding in the NC mountains! Only problem is that the wifes '01 F4i is runing waaaaaay rich. This just all of a sudden started during a ride. She was burning a minimum of a third more fuel than my '04 ZZR600. We first started noticing it because it would die at an intersection when she would come to a stop. Thought, humm, adjust the idle a little higher which helped with the stalling but starting the bike takes a little work and you smell raw gas but nothing is leaking out the bottom on the ground. Here are the details - '01 F4i with 2,300 miles on it. All stock, warehouse stored, premium gas. Any ideas????

Thanks for the feedback and anyone who has added the PowerCommander with USB, post up how you like it.

Post #: 1

RE: F4i fuel problem - HELP - 10/18/2005 10:22:23 PM

fullmetalf4i

Posts: 117
Joined: 9/21/2005
Status: offline

where do you normally ride? elevation could have cuased it.

(in reply to smokediver576)

Post #: 2

RE: F4i fuel problem - HELP - 10/21/2005 10:03:49 PM

smokediver576

Posts: 21
Joined: 10/2/2005
Status: offline

Bikes still acting up, even here at home. I unplugged the on-board computer to let it sit overnight to see if it is a reset issue. I cannot belive no one else has posted up any suggestions.

(in reply to smokediver576)

Post #: 3

RE: F4i fuel problem - HELP - 10/22/2005 2:52:58 AM

xmunxjai648

Posts: 158
Joined: 6/8/2005
Status: offline

when u say "warehouse stored" how long was it sitting there???

_____________________________

dude, where's the sprocket?

(in reply to smokediver576)

Post #: 4

RE: F4i fuel problem - HELP - 10/22/2005 4:46:56 PM

smokediver576

Posts: 21
Joined: 10/2/2005
Status: offline

"when u say "warehouse stored" how long was it sitting there??? "

I own a manufacturing business and have 10,000 sq ft building to store it there (and ride it around in on rainy days). It's ridden all the time, so, it could not be from sitting around. Oh well, guess it's off to the dreaded dealership on Monday!

(in reply to xmunxjai648)

Post #: 5

RE: F4i fuel problem - HELP - 10/23/2005 5:07:50 AM

xmunxjai648

Posts: 158
Joined: 6/8/2005
Status: offline

well i had a problem like that about 2 months ago, at 2800 miles...it started to die on me when i was riding on the freeway..not only once but a couple of times....i don't know if it was the gas or it just need some better spark plugs....but it runs fine after i did a tune-up...pumped in 91 at a 76 station..and shit hit the fan..got some iridium spark plugs for $10 each..never gonna pump at 76 again...chevron or shell for me

_____________________________

dude, where's the sprocket?

(in reply to smokediver576)

Post #: 6

RE: F4i fuel problem - HELP - 10/23/2005 11:23:42 AM

thebird_19

Posts: 28
Joined: 10/8/2004
Status: offline

I run the 87 octane in mine because everytime I put the higher stuff in, it runs rich. The guy I bought it from told me that and I tried it for myself and he was right. But mine has almost 12000 miles on it and it does some weird stuff with the fi every once in a while. I'm fixing to test mine and see what I can find out. I would run a fi test and see if there are any error codes. Just a place to start.

_____________________________

David D. '01 CBR F4i

(in reply to xmunxjai648)

Post #: 7

RE: F4i fuel problem - HELP - 10/23/2005 11:50:16 AM

1badf4

Posts: 73
Joined: 9/20/2005
Status: offline

there is no need to run anything greater than 87 octane. you are just wasting your money.

(in reply to thebird_19)

Post #: 8

RE: F4i fuel problem - HELP - 11/1/2005 12:31:45 AM

hwnf4i

Posts: 41
Joined: 11/1/2005
Status: offline

Hey diver will you please let us know what has happened when you get you bike repaired. I have this exact same problem. I have a bunch of the typical mods including a pcIII usb. the problem I am getting is an all around rich cond. mainly at idle and any constant throtle position. I believe from what I hav eread that it is the iat sensor( runs great when its cold..but still rich at constant throtle). Cold here is like 60 deg. f......... AnYoNe??? BTW where is the iat on an 01 f4i. Oh yeah I have been reading posts here for a few months now and would like to say Hello to all.

(in reply to 1badf4)

Post #: 9

RE: F4i fuel problem - HELP - 11/4/2005 7:14:34 PM

smokediver576

Posts: 21
Joined: 10/2/2005
Status: offline

Well got the bike back today and here is the poop!

Seems the F4i's have a little issue sometimes with the auto choke. Seems if you change altitudes or temps it can sometimes cause the choke to stay closed longer than it should. No big deal you say except that it starts to foul the plugs. Intelligent little computer thingy says, "hey, a plug is fouled so we should shut the ignition off to that cylinder". No big deal you say except it does not turn of the injector and now it's dumping raw gas into the cylinder. Which by the way settles where? - in your crank case! Bottom line came to this - Plugs had to be replaced ($18.75 per plug) and the oil/filter changed because it was 1/3 overfilled with gas - of which none of the $247 was covered by the warranty!

Mechanic hinted on the side that you should stay away from any bike that does not have a manual choke. Looks like I'll be looking for a 600 RR.

Awall

(in reply to hwnf4i)

Post #: 10

RE: F4i fuel problem - HELP - 11/7/2005 10:13:05 AM

hwnf4i

Posts: 41
Joined: 11/1/2005
Status: offline

Thanks for the update diver. so I guess the next question is how to disable the auto choke... It seems that if it happenend once it will happen again?!?! and again and again. I am about to change out to my 3rd set of plugs already and like you are contemplating a "true fix" by getting another bike. Don't get me wrong this is a grea tbike and I really like it but damn... I sold my 00 r6 and got this 01 f4i and I am really starting to regret my choice in the matter. this bike is way more comfortable and easier to ride and I thought I was making a fair trade off of hp for comfort/handling. I have read a few posts here on rich problems( I think 3) and think that this must be a more common problem than it seems. Sooo close to getiing rid of this bike just for this one reason...Anyone have a beter "repair" for this problem that diver nd I could benefit from other than the little band aid that was given to him from the dealer cause I would hate to be "stuck on band aid and the repair bill stuck on me"( plugs 70 to 80$ a set and oil change min40$ and thats just for parts).

(in reply to smokediver576)

Post #: 11

RE: F4i fuel problem - HELP - 11/7/2005 10:15:02 AM

hwnf4i

Posts: 41
Joined: 11/1/2005
Status: offline

And thats once a month!

(in reply to hwnf4i)

Post #: 12

RE: F4i fuel problem - HELP - 11/7/2005 8:36:18 PM

hondasbest

Posts: 11
Joined: 11/7/2005
Status: offline

HI, Just joined this wonderful honda site. Just has a thought on the fuel problem, I had a problem with my 2002 f4i recently it ended up being a kick stand sensor, but in my quest to track down the problem i tested by fuel pressure and it was high. So i replaced my fuel pressure regulator and it fixed a few other probs i had with slight hes. when cold, if you u are having fuel probs, i would check that out. new part cost around $60.

(in reply to hwnf4i)

Post #: 13

RE: F4i fuel problem - HELP - 11/12/2005 12:11:31 AM

hwnf4i

Posts: 41
Joined: 11/1/2005
Status: offline

Took bike to the dealer wed. afternoon and bike was done fri. morn. I followed diver by just taking it to the dealer. They spoke with me for a while and asked what the symptoms were... so I told them. they remapped my pcIII usb and tweaked the map(will check out map and what they did later) bike runs better . Lucky for me I took the bike to the 1/4 mile last week and am planning to take it again tomorrow and that should tell the story. BTW they charged me 75$... much less than I planned to spend. and last weeks best time was 12.28 @ 111 mph. I was really hoping for at "least" a mid 11 sec and at least 120 mph. It should do at least the 120mph part but(crossing my fingers) the track here requires full leather for any passes above 120mph... yup you guessed it the money I planned to spend on repairs bought me some new AStar pants..... and you gotta get a matching jacket.....500$ total. will keep you posted on what happens

(in reply to hondasbest)

Post #: 14