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washton
Joined: 04 Nov 2008
Posts: 7
Location: West London
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 Posted: Thu Jan 15, 2009 1:58 pm Post subject: Stalling |
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Bike starts & runs fine for 30 minutes, then will stall everytime one stops after this time. Will start again with a bit of throttle on & runs fine from 10mph upwards.
Idle screw has no effect, injector replaced, fuel pump & filter checked, exhaust not leaking.
All ideas welcome. |
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Thu Jan 15, 2009 3:19 pm Post subject: |
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What bike is it?? as im confused....
Youve said it has an idle screw, so i assume its a carb model like a GT200 but then you mention an injector so that makes it a GTS or GTV??
The GTS has no idle speed screw, theres an adjusted on the throttle body, but its not to set idle speed its to set the throttle potentiometers position to a closed throttle position... DO NOT ADJUST IT!
Sounds like it needs a trip to a diagnostic machine, and someone who can use one and understand what it means 
Where abouts in the world are you? |
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peterH
Joined: 13 Jul 2008
Posts: 12
Location: Kingston upon Hull
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| Posted: Thu Jan 15, 2009 3:55 pm Post subject: |
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dear Cheeky,
where are you based at, you deffo sound like someone who knows his auto Vespas. I might see you in the future if I need anything tinkering/adjusting or fixing etc
regards, Peter |
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Thu Jan 15, 2009 4:39 pm Post subject: |
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Im located in the dying hell hole known as lowestoft...  |
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washton
Joined: 04 Nov 2008
Posts: 7
Location: West London
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| Posted: Thu Jan 15, 2009 7:50 pm Post subject: GTS stalling |
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Thanks Cheeky. If I was anywhere near Lowestoft I would come & see you, I'm in West London.
The bike. Well I guess I may have commited a sin. It's a 2002 Gilera Runner with a 2007 250 GTS engine with external fuel injection. Too late with the potentiometer screw its been on the move.
After riding 70Km on the bike today, it's not so much stalling on idle, it will idle, but as soon as you open the throttle it dies unless you increase the throttle very slowly. Booked it in for a diagnostic next week with my friendly Piaggio dealer, though I'm not always convinced they can deal with subtle problems. |
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Thu Jan 15, 2009 7:53 pm Post subject: |
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Is it the GTS injection system or an aftermarket set-up  |
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washton
Joined: 04 Nov 2008
Posts: 7
Location: West London
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| Posted: Fri Jan 16, 2009 12:24 pm Post subject: Stalling |
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Cheeky
Unfortunateley you can't use the GTS integrated filter, pump, regulator with a standard Runner tank. The solution is a 3 piece external system. This uses a free flow injection filter, pump & seperate pressure regulator with return tank dump. This has been running without fault since installed. It delivers a constant 2.5 bar pressure @ the injector. |
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Fri Jan 16, 2009 3:47 pm Post subject: |
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Im talking about the injection system.... not the pump, thats just fuel supply.
Is it running the GTS injection module, injector and oxygen sensor set up... can you still interface with the ECU for updates etc? |
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washton
Joined: 04 Nov 2008
Posts: 7
Location: West London
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| Posted: Fri Jan 16, 2009 5:00 pm Post subject: Stalling |
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| Yes everything is standard apart from the fuel supply. |
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Fri Jan 16, 2009 7:28 pm Post subject: |
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There was an ECU firmware revision last year for stalling issues, so its worth checking the programming is upto date...
... then a simple check on a diagnostic box will soon reveal the culprit.
(dont forget to reset the throttle potentiometer zero position as well if youve twiddled it thinking its a tickover screw) |
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washton
Joined: 04 Nov 2008
Posts: 7
Location: West London
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| Posted: Sat Jan 17, 2009 7:33 am Post subject: Stalling |
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Thanks.
If my dealer can't sort it out it might be a lowestoft expedition. |
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Sat Jan 17, 2009 8:26 am Post subject: |
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| Most likely culprit is failed injector... Seeing more and more appear nowadays, always keep running, but get a little rough round the edges. |
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Doug
Sargeant
Joined: 22 Aug 2008
Posts: 57
Location: Southport
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| Posted: Mon Jan 26, 2009 9:56 pm Post subject: |
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| CheekyThomas wrote: | There was an ECU firmware revision last year for stalling issues, so its worth checking the programming is upto date...
... then a simple check on a diagnostic box will soon reveal the culprit.
(dont forget to reset the throttle potentiometer zero position as well if youve twiddled it thinking its a tickover screw) |
My GTS occasionally stalls, I asked the dealer who serviced it if the ECU firmware had been updated & he says that there haven't been any updates.
It's an 06 model & they want £20 to check the ECU firmware, is it worth doing??
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CheekyThomas
Guvernor
Joined: 18 May 2007
Posts: 1374
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| Posted: Tue Jan 27, 2009 8:16 am Post subject: |
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Yet another dealer with no idea on how to use the equipment, Or the dealernet system... Yes chances are it needs an update if it's a 2006 bike on original software.
As for paying someone who doesn't even know about the updates, stuff that go elsewhere! It annoys me so much at times... Think I'm turning into a grumpy old man?  |
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Doug
Sargeant
Joined: 22 Aug 2008
Posts: 57
Location: Southport
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| Posted: Tue Jan 27, 2009 8:36 am Post subject: |
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What annoys me is that they should have done it on one of the services that the previous owner had done at that very dealer..... 
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