|
FACTORY CUTS OUT |
Post Reply 
|
| Author |
 Share Topic Printable Version Google Delicious Digg StumbleUpon Windows Live Yahoo Bookmarks reddit Facebook MySpace Newsvine Furl Topic Search  Topic Options
|
jools 
Moto GP God 
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
 Post Options
 Quote Reply
 Topic: FACTORY CUTS OUTPosted: 05 Jun 2010 at 8:12am |
|
After each section of a track day recently when you come back to pit lane, you have to use the clutch to negotiate other riders etc my bike just cuts out. the bike starts, idles, and runs fine, its this anoying cut out at low speed which you will know when it happens you cant let the clutch out cos the back wheel just locks, and you cant restart untill you find neutral. its as if i have fuel starvation but i would have starvation all the time and the bike ran perfect, no glitches.
ive lifted the tank to check if any pipes are trapped or nipped but all look fine. the track temperatures were high, dont know if this had anything to do with it ??
 |
|
 |
|
|
amb67
Admin Group
Joined: 11 Feb 2008 Location: Marden in Kent Online Status: Offline Posts: 735 |
Post Options
Quote Reply
Posted: 05 Jun 2010 at 8:27am |
|
How olds the bike? Pre 2004 shape or post?
Post 2004 have an idle stepper motor set up and you may have another issue causing the stalling, pre 2004 is more than likely just a case of getting the CO set and the throttle bodies balanced. Where in the world are you, reason I ask is that the best man for the job is Griff in Tamworth? If you can't get to Griff then at least give him a buzz and pick his brains, he's a top bloke that will help you fix this stalling issue. http://www.apriliaperformance.co.uk/ Griffs Number - 01827 285500 |
|
Blue ones are so much faster than black ones. |
|
|
|
|
jools
Moto GP God
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
Post Options
Quote Reply
Posted: 06 Jun 2010 at 7:45am |
|
hi cheers for the info. the bike is an 04 model, excuse my ignorance but what is an idle stepper motor set up ?
ive spoke to griff before and yes he,s a top bloke, but unfortunately im about 200mls north from tamworth., and in this part of the world we are poorly served with anything to do with bikes, so i try and do most stuff myself. but sometimes sh*t like this happens and you really need a bloke like griff on your door step.
im purely guessing it maybe a faulty air pressure sensor, but no errors have come up on the dash, and how would you know if it was faulty ? the only way i know would be to replace it and see if the problem dissapeared. if it didnt doing that way could turn out v expensive given the cost of aprilia parts.
best solution at the mo me thinks is to give griff a buzz sometime next week, but in the meantime if anyone has any views i,ll be glad to hear them.
cheers jools
|
|
|
|
|
pausan
New Boy 
Joined: 09 Jul 2010 Location: Hartlepool Online Status: Offline Posts: 6 |
Post Options
Quote Reply
Posted: 14 Jul 2010 at 12:08am |
|
Hi Jools
It does sound like an idle stepper motor problem, the stepper motor is an electrical motor that is controlled by the bikes injection ecu (computer) the ecu commands the motor to extend or retract its plunger this opens or closes an air bleed circuit within the airbox and gives you higher or lower revs at idle/slow speeds, if the plunger becomes fouled/dirty this will interupt the air bleed circuit and cause the bike to cut out, you will find the idle stepper motor on the underside of the air box on the right at the rear (looks like a black bobbin) it is secured by two screws, remove the screws and take out the stepper motor you will see that it is a motor with a plunger and domed tip, examine the plunger tip and remove any deposits of oil, sludge, carbon, or dirt so that it is thoroughly cleaned, now clean out the recess where the plunger goes up into the airbox refit stepper motor and road test.
Please note that cleaning the plunger only addresses the mechanical function of the stepper motor and checking the electrical function is a little more involved.
 great forum guys keep up the good work
 |
|
|
|
|
tapmyhed
Moto GP God
Joined: 11 Feb 2008 Location: Suffolk Online Status: Offline Posts: 369 |
Post Options
Quote Reply
Posted: 14 Jul 2010 at 11:11am |
|
This is good stuff, going to check mine now as its never been cleaned out in 38K miles!
Also Jools, if its not this and you suspect the MAPSs, I have a spare I can send to you so you can swap that out and try it. As long as I get it back!! |
|
|
Factory 04
38,000 miles 135 BHP at wheel 178.6 MPH true max speed PC3 / Airbox mod / SATO 2 Rearsets / SATO hangers / Acropovic SP pipes / vid cams / HID |
|
|
|
|
jools
Moto GP God
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
Post Options
Quote Reply
Posted: 16 Jul 2010 at 8:08am |
|
cheers lads im stuck in this weekend so i,ll give it a bash, Just found out why i cant start in gear,, the racing master cyclinder ive got does not have a switch on it i,ll let you know how i get on. thanks again for the info much appreciated. jools
|
|
|
|
|
Mahoney
Rookie 
Joined: 14 Dec 2009 Location: Essex Online Status: Offline Posts: 69 |
Post Options
Quote Reply
Posted: 22 Jul 2010 at 10:54am |
|
Think I better check mine too. It does te same thing.
|
|
|
Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting '...holy sh*t ...what a ride!
www.essexbikerscentre.com |
|
|
|
|
jools
Moto GP God
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
Post Options
Quote Reply
Posted: 27 Jul 2010 at 8:33pm |
|
update, i think ive found the problem. although the min regulation engine and the min regulation valve or the black thing under the airbox on the right were almost spotlessly clean the plunger was totally seized.
im almost certain its this but i wont know for 100% until i change it for a new one..
the problem now is the time of the year
if the maindealers havent got one in stock, the whole of italy closes for a month august 1st, then its down to taking a chance on fleabay. fingers crossed..
 jools |
|
|
|
|
jools
Moto GP God
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
Post Options
Quote Reply
Posted: 31 Jul 2010 at 6:30am |
|
Back to the drawing board. i managed to get another min reg engine and valve, and the problem is still there, any ideas of where to go next ????
jools
|
|
|
|
|
tapmyhed
Moto GP God
Joined: 11 Feb 2008 Location: Suffolk Online Status: Offline Posts: 369 |
Post Options
Quote Reply
Posted: 31 Jul 2010 at 11:44pm |
|
It might be that you have previously set the bike up against this 'seized' componant and now all you need to do is get it set up again with the new one??
Not sure, however if it is part of the idle running system, by putting in a new part that might be set slightly differently to the old one, then I would probably get it done.
Can anyone offer more info on this?
Are you absolutly sure that all the hoses, including the ones that go to the front, are not leaking. I have a wild thought that the slipper clutch being a diafram type, that uses a vacuum to operate could leak air??????????
Stabs in the dark, but everything related to maintaining pressures in the throttle bodies has to be considered as a 'small' leak can have big effects to idling pressures...not 'on the gas' pressures, which would overcome small leaks anyway.
You say after having a good thrash on a track, you get this problem, so this could be related to increased heat, which could be affecting quite a lot of things...sealing of TBs to manifold, pipes, could be fuel pressure related, are both hoses good? Hoses split off to 2 1 way valves, one to the slipper, one to the frapper.....the slipper or the frapper could be leaking??
Anyways food for thought!
|
|
|
Factory 04
38,000 miles 135 BHP at wheel 178.6 MPH true max speed PC3 / Airbox mod / SATO 2 Rearsets / SATO hangers / Acropovic SP pipes / vid cams / HID |
|
|
|
|
BB1000
Rookie
Joined: 11 May 2010 Location: Bedford Online Status: Offline Posts: 93 |
Post Options
Quote Reply
Posted: 01 Aug 2010 at 11:47am |
|
Contact Griff.....get him to have a look, he is the Aprilia Guru after all
|
|
|
|
|
jools
Moto GP God
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
Post Options
Quote Reply
Posted: 01 Aug 2010 at 8:23pm |
|
its got me beat at the mo this one, because it is definately better with the new min engine and min valve fitted, but the problem is still there. it still cuts out but not all the time;; as it did before ,all the hoses and conections are 100%. as far as im aware the min engine and min valve help regulate the tick over. ive not set up the bike at all, its ran map 2, sp akrapovics, which were fitted from new 6yrs ago;; last year i fitted an evo open air filter, spark plugs are a perfect colour so fueling is pretty good, yes i probably would be better off going down the power commander route but up until now the bike has ran perfect..
also another problem happened today, dont know if its connected ??? the bike was thrashed for about 25 mins. the bike ran on tickover but you could tell it was hunting. i stopped for about 15mins.. started the bike,, set off and the bike went into limp mode where the revs surge intermitantly to 6k and the red triangle appears;; i turned the engine off and restarted straight away and the problem was gone
im grasping at straws but i was thinking a loose conection on the ecu ?? ecu overheating ?? not sure??
the original tick over problem started after a session on the track but it now seems to be there even when the bike is cold, but not all the time;;there just doesnt seem to be any continuaty in the problem which is confusing me.
if only griff was local, im about a 4hr drive from tammworth, but if i cant get it sorted my end then i,ll have to make that trip. jools
|
|
|
|
|
BB1000
Rookie
Joined: 11 May 2010 Location: Bedford Online Status: Offline Posts: 93 |
Post Options
Quote Reply
Posted: 01 Aug 2010 at 10:49pm |
|
unplug the atmospheric sensor...see if that makes a difference.....its near the tilt sensor
|
|
|
|
|
jools
Moto GP God
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
Post Options
Quote Reply
Posted: 31 Aug 2010 at 5:37pm |
|
Found the problem. it was a faulty oil pressure sensor that was shutting part of the ecu down, only found out when i turned the bike on and the oil sign wouldnt go out, i replaced with a new oil pressure switch and the idle problem has dissapeared. hey presto !!! jools
|
|
|
|
|
Tash
Club Champion 
Joined: 27 May 2009 Location: Durham Online Status: Offline Posts: 118 |
Post Options
Quote Reply
Posted: 01 Sep 2010 at 6:41am |
|
Alright Jools, if you want your bike checking over I have got Griff coming up to mine, should be on the 20th Sep. Let me know if you are interested and I will add you to the list.
Cheers
Mark
|
|
|
Xtreme Prerformance Solutions
Tel: 01325 778358 E mail: info@xtremeps.co.uk |
|
|
|
|
jools
Moto GP God
Joined: 11 Feb 2008 Online Status: Offline Posts: 434 |
Post Options
Quote Reply
Posted: 07 Sep 2010 at 8:42pm |
|
hi mark pm sent. jools
|
|
|
|
|
amb67
Admin Group
Joined: 11 Feb 2008 Location: Marden in Kent Online Status: Offline Posts: 735 |
Post Options
Quote Reply
Posted: 07 Sep 2010 at 9:01pm |
|
Great news mate, not the first time I've heard the oil press switch causing issues...
|
|
|
Blue ones are so much faster than black ones. |
|
|
|
|
tapmyhed
Moto GP God
Joined: 11 Feb 2008 Location: Suffolk Online Status: Offline Posts: 369 |
Post Options
Quote Reply
Posted: Yesterday at 7:47am |
|
Mmmm was the idle problem just the 'limp mode'? Happened to me once, but the tickover was OK, just would not rev above 3000 RPM. Spotted the oil pressure symbol still on and changed that.
Strange how yours would not idle too, very strange......but great fix, just in time for the rain....PAH!
|
|
|
Factory 04
38,000 miles 135 BHP at wheel 178.6 MPH true max speed PC3 / Airbox mod / SATO 2 Rearsets / SATO hangers / Acropovic SP pipes / vid cams / HID |
|
|
|
|
Post Reply
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
