EFI falult help please!!!

Message

gavhowe · #1 Post by **gavhowe** » Wed Jul 25, 2007 8:58 am

Hi, had a problem with my Falco this morning, washed the bike last night, then left it to warm up. Ran fine at idle. Then fitted new chain and sprockets all went ok.

So started it up this morning and left it to warmed up while got ready still all good, bike reved cleanly at idle. So get on and head off off work and 100metres down the road the EFI warning comes on and the engine power is cut, it still ran but would not go above 4000rpm, took it up and down the road it try to warm it up and dry something out but no luck. If I pulled the clutch in and let the revs dropped back to idle then the EFI would go and temperture would display again. but as soon as you picked the revs back up the EFI would return. So had to take the car to work, bummer cos weather is good today.

So I am now sat at work thinking what the problem could be, wish I could get home to look at it.

Can any one help??????????

I am going to run the fault code check when get home, have also read about the right hand air duct sensor, but from what I have read this would just cause the EFI display and not the cut in power to safe mode.

The bike is a 2001 falco with Chip, airbox mod, cans and VTR sidestand.

Stokesy · #2 Post by **Stokesy** » Wed Jul 25, 2007 10:11 am

Hi Mate

and welcome to the site

I had this in France a couple of months ago, bike stood in the rain all night, hopped on in the morning everything cool 100 yards down the road "EFI" I rode to the nearest garage and switched off, filled with fuel and started again everything hunky dorey

I put it down to some damp electrics, I rode through to Italy in the pissing rain and never suffered the problem since.

I would guess that if you go and try at lunchtime everything will be cool

gavhowe · #3 Post by **gavhowe** » Wed Jul 25, 2007 10:20 am

Did this cause it to run in a safe mode with very little power, as it was spluttering at lot. What I found strange was that it was only when the revs picked up and when the bike was moving. It reved perfectly at idle.

D-Rider · #4 Post by **D-Rider** » Wed Jul 25, 2007 10:31 am

Hello and welcome - I see you've also posted this up over on the AF1 forum - I expect that between us we'll point you in the right direction.

Never had this problem myself but it is something I've seen reported several times- seem to remember something about the air temperature sensor in the ducts that feed the air box getting wet (but that could have been something else)

To help resolve this you may find it useful to download the Falco workshop manual from HERE (although it is a BIG download)

The relevant pages seem to be 6:10 (and following) and 4:12 (and following)

There may be others but I've not read the entire manual!

Hope this helps.

gavhowe · #5 Post by **gavhowe** » Wed Jul 25, 2007 10:37 am

I have got the manual already, have print the electric system section off for when I return this evening.

My first thought after reading about the sensor in the right air duct is that it could be the problem, but I also read a post about it else where and it stated that the EFI flashed but the bike ran fine. I was struggling to get to 60mph.

Thanks for the suggestion keep them coming.

Gav

D-Rider · #6 Post by **D-Rider** » Wed Jul 25, 2007 10:54 am

gavhowe wrote: My first thought after reading about the sensor in the right air duct is that it could be the problem, but I also read a post about it else where and it stated that the EFI flashed but the bike ran fine. I was struggling to get to 60mph.

Thanks for the suggestion keep them coming.

Gav

Fair point. May be worth checking that all is OK with the ignition system - heard a few reports recently of plugs coming unscrewed - maybe something like this or a plug cap shaking loose or some other connection in the electrical system - anything that would be related to vibration at speed.

Another thing I've heard of is the tank breather becoming blocked with resulting fuel starvation as you demand higher flows. If it happens again, stop and quickly open the fuel filler to see whether a partial vacuum has formed.

Mind you, these things are not necessarily related to the EFI message and it seems you are getting that every time you get the problem?

bigun · #7 Post by **bigun** » Wed Jul 25, 2007 11:06 am

On the Falco rideout last year (it was unbelievably wet!) mine came up with EFI and also the left hand display randomly selected between modes. The EFi thing is normally due to as people say the sensor in the air duct but I've never heard of a loss of power. My car went into safe mode a few months back when the Lamda sensor went as the computer cuts power/emissions etc but I've never heard of the Falco doing that. Don't think its clever enough to be honest!

I'd be checking other stuff like loose plugs (maybe damp in there) which would cause loss of power and EFI possibly?

Firestarter · #8 Post by **Firestarter** » Wed Jul 25, 2007 11:34 am

Two questions, one straight the other a bit chicken & egg this
1 - At 4000 rpm, does it feel like a rev-limit has been reached?
2 - Is something causing a power drop, leading to the EFI message, or has something else caused a problem leading to the EFI message and the computer capping power?

Sounds like the latter, some sensor has got wet and is causing an error, meaning the computer has put in a low rev-limit

WhiteRhino · #9 Post by **WhiteRhino** » Wed Jul 25, 2007 11:47 am

I have experienced the exact same thing on a couple of occasions after washing the bike. I would recommend draining the drain tube from your airbox (as described in the owners manual) and then opening the airbox up and leaving it to 'air' overnight (assuming it is under cover, obviously). The problem has never reoccured the following day for me.

Good luck.

gavhowe · #10 Post by **gavhowe** » Wed Jul 25, 2007 12:25 pm

the bike feel like a rev limiter just feels like it has about 10bhp, if you try to rev it higher it just coughs and wont. I sure it is the computer shutting it down, as it starts to pull fine, then suggely the EFI will appear and all the power dissappears.

The bike has a renagrade airbox chip and cans.

A guy on another forum mentioned a switch on teh clutch level that has caused him an issue with starter, anyone else had an issue with this switch. Would explain why the problem goes any when you pull the clutch in.

Firestarter · #11 Post by **Firestarter** » Wed Jul 25, 2007 3:59 pm

Bad petrol? Not getting petrol in, or not getting enough air through?

I had a Honda Bros which ran fine at tick-over or part throttle, but as soon as you cracked the throttle it chugged and died - turned out to be the fuel pump, it worked well enough to tick-over or maintain speed, but it starved the engine when accelerating a bit harder. The EFI could be the computer recognising that the fuel mix is incorrect?

xrphil · #12 Post by **xrphil** » Wed Jul 25, 2007 5:58 pm

i had the EFI when wet prob a few months ago, no drop in perfornce.
Also had a plug electrode come off, and a plug cap fail, both gave bad performance low down the revs 2-4000 rpm, then it was less noticable.
does sound more like some sort of restriction, either mechanical or electronic.
also check if its only running on one pot, possible but unlikely with 2 plugs per cyclinder.
what about connecting the diagnostic wires togather and seeing what code you get, shuold tell you an error code, and what is causing it (I Have a list for this and can probably find a link for it)
I recently fixed an annoying prob on my SV this way. tells you where to look if nothing else.
good luck

WhiteRhino · #13 Post by **WhiteRhino** » Thu Jul 26, 2007 10:49 am

Gav,

You will see that I posted earlier saying that I had had the exact same issue when the bike was damp. I don't know if it just a coincidence but I have a Renegade chip aswell.........

Matthew

Thumper · #14 Post by **Thumper** » Sun Jul 29, 2007 8:56 pm

gavhowe wrote:Hi, had a problem with my Falco this morning, washed the bike last night, then left it to warm up. Ran fine at idle. Then fitted new chain and sprockets all went ok.

So started it up this morning and left it to warmed up while got ready still all good, bike reved cleanly at idle. So get on and head off off work and 100metres down the road the EFI warning comes on and the engine power is cut, it still ran but would not go above 4000rpm, took it up and down the road it try to warm it up and dry something out but no luck. If I pulled the clutch in and let the revs dropped back to idle then the EFI would go and temperture would display again. but as soon as you picked the revs back up the EFI would return. So had to take the car to work, bummer cos weather is good today.

So I am now sat at work thinking what the problem could be, wish I could get home to look at it.

Can any one help??????????

I am going to run the fault code check when get home, have also read about the right hand air duct sensor, but from what I have read this would just cause the EFI display and not the cut in power to safe mode.

The bike is a 2001 falco with Chip, airbox mod, cans and VTR sidestand.

HI welcome gavhow and did you use a hose to wash your bike? Almost certainly caused by a wet air sensor, it lives in the off side front air intake and is prone to get water logged. If you can get a hair drier in there all will be well then treat it to some damp proofer.

gavhowe · #15 Post by **gavhowe** » Mon Jul 30, 2007 11:36 am

Just to let you know I got home from work and the bike worked perfect it must have dried its self out during the day.

Must be more careful with water around it. I have ridden though hugh storms on it and never had an issue. I guy on another forum did mention a switch on the clutch lever, then when water got on it produced the same problem, so think it may have been that. due to the problem not being there is neutral or when the clutch was pulled in.

Thanks for everyones help

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EFI falult help please!!!

EFI falult help please!!!

Re: EFI fault help please!!!