Fatboy stalling and breakdown

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Jan 22, 2020 | 05:42 AM

Fatboy adventurer

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1st Gear

Joined: Jan 2020

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From: Uk

Fatboy stalling and breakdown

Hiya my 2008 stage 1 Fatboy with big radius pipes started stalling as I pulled up at the lights

I saw about a dirty air intake so cleaned this out with carb cleaner and everything seemed good

The bike ran fine with pillion and luggage on a 500 mile run without missing a beat

Then the next day the problems re occurred and cleaning the air intake would not help

As this happened on a ride out we attempted to limp back where the symptoms worsened to only firing on one cylinder and occasionally both at higher revs before finally giving up and stopping running altogether having used a surprisingly large amount of fuel

On inspection there appears to be a good spark at each plug

a strong smell of petrol

I have noticed that when the ignition is switched on the whine from the fuel pump sounds different possibly slower

Any tips on where to start looking would be gratefully received

Thanks Dave

Just looked for fault codes and got

P1353

P1356

Pn32920-07C

Last edited by Fatboy adventurer; Jan 22, 2020 at 06:26 AM. Reason: New codes found

Jan 22, 2020 | 03:13 PM

ghost183

Tourer

Joined: Feb 2015

Posts: 268

Likes: 36

From: Athens Greece

for starters.. are you running a tuner of any kind?

did you check grounds? if your pump is sourcing ground from somewhere else.. its performance would suffer

Jan 22, 2020 | 06:25 PM

marcodarq

Grand HDF Member

Joined: May 2014

Posts: 3,843

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From: florida

check your fuel pressure and check for acum and fuel leakages.
m

Jan 23, 2020 | 02:22 AM

Fatboy adventurer

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1st Gear

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From: Uk

Quote:

Originally Posted by marcodarq

check your fuel pressure and check for acum and fuel leakages.
m

Hiya thanks for the help I’d seen some comments in other people’s chats about pin holes in fuel lines so as my bike is 12 years old now I was thinking of replacing the fuel filter and fuel lines to remove this option and check the pump and pressure at that time as a maintenance even if this does not prove to be the cause

Thanks for the suggestion it’s confirmed my decision to do this

Jan 23, 2020 | 02:32 AM

Fatboy adventurer

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1st Gear

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From: Uk

Thanks for the suggestion I do have a fuel manager/tuner I’d seen somewhere but may have totally misunderstood that if you disconnect this the ecu has memory to start the bike and by doing so check the function of this electrical component

You may have seen on my other reply that I’m planning on replacing the fuel filter and fuel lines so will check out the fuel pump at this time

Thanks again for your help I’ll give these thoughts a try see how it pans out and post and results

Jan 30, 2020 | 06:16 AM

Fatboy adventurer

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1st Gear

Joined: Jan 2020

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From: Uk

Still confused

Hiya just been fiddling with Fatboy

Cleaned the air intake and sensor

Jiggled the the aftermarket fuel management box unplugged and reconnected various sensors and moving different sections of wiring

Thought I’d just see if it would start so put in some fresh fuel

Pressed the start button and this time it springs into life running sweetly

Very pleased but still a little concerned this may reoccur So fingers crossed and waiting for a suitable day for a test ride

Thanks for your ideas and help

If it reoccurs I’ll at least have some ideas of what to do