Something went pop - Suggestions please
 

Asking and hoping you're all willing to help me brainstorm a problem:

Following on from fixing any bent, dented etc parts on the bike following on from Fridays events - - > http://forums.sv650.org/showthread.php?t=161310

I set off to work this morning and everything was normal (with exception to a flat battery but I assumed this was more to do with my leaving the hazards on for about an hour while I tinkered with a faulty indicator. Anyway everything was working normal no problems to report etc until whilst accelerating hard onto the motorway something went.

It felt very similar to when the curvy used to get soaked and loose a cylinder in the rain, only this is a pointy and its not raining today... Plus when I stopped and checked it didnt seem so much like the cylinder wasnt working, instead it just sounded really rough.
So I've booked the afternoon off and intend to get my fingers dirty however I could do with as many suggestions as you've got regarding what to investigate.

Things to consider:
Oil level is good,
Oil Filter is recently new,
Its been laid down recently,
Was running fine, until suddenly while opening the throttle it has became very under powered.


Any help, comments, advisorys etc would be apprechiated.

Re: Something went pop - Suggestions please
 

Was it running on 1 cylinder?
Crap could have got through the system from the dropped fuel tank.
Cables to the throttle ok?
Ht leads on properly, could have dislodged a touch on the drop?
If its running on both cylinders smoothly but with no power, not sure, it could be loads of things.
Ecu, not getting all the info it needs, so limping along.
Valves possibly, not sure how they would get damaged but something like that could explain loss of power and rough running.

Check the basics before pulling engine apart.
Electrics,
coils,
ht leads,
spark plugs,
Exhaust, does it still look ok, any leaks?

Re: Something went pop - Suggestions please
 

Not sure what else to add to that TBH, any FI light that could give you a fault code?
Fuel pump has a filter on it so it #shouldn't# be a blockage, but you never know

I am free today so if you are stuck give me a call

Re: Something went pop - Suggestions please
 

Im gonna stop off and pick up some plugs etc, to do a service I recon see if that helps and see if I can spot anything else along the way, check the exhaust and then prob give you a call then Chris. :)

Re: Something went pop - Suggestions please
 

if its been running on its side could it have pumped a little bit of oil into the airbox? gets sucked into the throttle bodies on full throttle and boggs it all down?


thats my 2penneth :)

or a loose lead

Re: Something went pop - Suggestions please
 

I'd guess the same. Maybe oil went up the crank breather tube and into the air box same as Andy said.

Re: Something went pop - Suggestions please
 

if your about just give me a shout ill pop up again n bring up that bracket. finish at 5 today !

Re: Something went pop - Suggestions please
 

Thats not possible is it? i mean run on its side? isnt there a tilt sensor or something on it that cuts the engine if it goes down.

Re: Something went pop - Suggestions please
 

Regardless if it has a tilt switch or not. If the bike is on its side, there is a chance for the oil to run up the breather pipe and into the airbox.

Re: Something went pop - Suggestions please
 

I dont doubt that its possible, i was questioning the bike 'running'.
Tbh, the fact that the bike was running sweet for a bit suggests to me that wasnt the case anyway, i would have thought oil in the airbox would have an effect almost immediately (?)
Its the sudden pop then lack of power that would concern me.

Re: Something went pop - Suggestions please
 

OK:
Standard Service complete,
New plugs,
New Filters
New Oil

Found nothing suspect during this process and still it feels to be running like a dog.

I can confirm it is running on both cylinders and that on down shifts everything feels normal. There was a distinct smell of petrol when I got off the bike perviously. Im going to finish putting it back together and take it for a spin to try and give you guys some further hints to help a diagnosis.

Oh and nothing appeared to be loose etc during the dismantle.

YC if you're not busy now would be a really decent time for you to take a trip into kirklees ;)

Re: Something went pop - Suggestions please
 

Sounds like a fueling issue maybe, does it sound rough on tickover?

Re: Something went pop - Suggestions please
 

Yeah, idle is sitting at 1000
Im just checking TPS atm I've dropped it into dealer service mode and got "_c00" as opposed to "-c00" so the good news is there are no dealer faults BUT my minus is an underscore... hope thats the issue.

Re: Something went pop - Suggestions please
 

ok couldnt do the tps test cos it now wont start my battery is clearly on its way out.
(FFS should have sold it for 1900 when I had the chance)
ANYWAY bump started the bike and took it for a chug (spin would be inaccurate)

im stumped tbh, :-(

Re: Something went pop - Suggestions please
 

time to buy an s4?

http://www.dragtimes.com/images/17287-2001-Audi-S4.jpg

they do an estate version as well - ideal for prams and stuff:
http://gallery.hartmannwheels.com/do...VSXX_B5_S4.jpg

Re: Something went pop - Suggestions please
 

Yep, you should have sold it :)
The times that's happened to me when ive held out for a higher price but end up getting less is unreal.
That said, the one and only time it worked out was when I sold my sv .

Re: Something went pop - Suggestions please
 

Fuel injected bag of sh*t, should have stuck with curvy

Re: Something went pop - Suggestions please
 

i had similar problem with my cb350 twin twice, first time it was dirty fuel, sprayed some carb cleaner and it cleared it instantly, dont know if there an equivilant (throttle body cleaner?), second time the ht lead was really wet on the plug, so i had to blow dry the ht lead an dry the plug and again it went fine. hope you get it sorted soon.

good luck

Re: Something went pop - Suggestions please
 

Dont wanna jix it buy YC may have waved his magic wand of mistery and solved this.
Not gutted that in 30seconds on the phone he achieved what had taken me about 5 hours to, nope not gutted at all :(

Re: Something went pop - Suggestions please
 

solved?

Re: Something went pop - Suggestions please
 

Loose battery or weak electrical connection somewhere?

Re: Something went pop - Suggestions please
 

And? What was it?

Re: Something went pop - Suggestions please
 

Don't be shy Chris, let us know what you think
:smt023

Re: Something went pop - Suggestions please
 

Wayhay sorted, it was... drum roll please.
HT Coil Pack for the rear cylinder had gone Kaput. Totally over looked it

Re: Something went pop - Suggestions please
 

Winner :)

Re: Something went pop - Suggestions please
 

Winner chicken dinner.

Re: Something went pop - Suggestions please
 

at least you can point any new buyer to this thread as you have checked the whole bike over and then it was a simple fix :)

Re: Something went pop - Suggestions please
 

If a new buyer were to read this I'd hope they'd see that when something does go wrong I go into manic mode and keep going until its fixed. Less than 24 hours after something broke, it was fixed - and not just fixed it was serviced for the hell of it too.

Re: Something went pop - Suggestions please
 

get it on ebay quick! or autotrader

Re: Something went pop - Suggestions please
 

Well I was close. Okay weak electrical connection could have been anywhere on the bike. :lol:

YC know it all to the rescue again. :)

Re: Something went pop - Suggestions please
 

I'd fallen into the trap of "Somethings wrong with teh bike and I dont know what it is, therefore it must be the aspect I know nothing about" [Fuel Injection] I therefore proceeded to spend a few hours trawling through the Haynes and google to try and give myself something to go on. Not 10mins before YC called up I'd decided the only clue I had was the deposits on the plug so started reading into those. Took YC 5mins worth of talk time to narrow it down to the 10inch between Coil connectors and Spark Plug.

Still lesson learnt - Fuel, Compression, Spark - The order of investigation

Re: Something went pop - Suggestions please
 

Completely kaput or just intermittent?

I would have suggested a coil, but you said it was firing on both cylinders.

There was a faulty batch of coils on K6 bikes, but most of them went pop in the first year.

Re: Something went pop - Suggestions please
 

I did, on idle it didnt sound too bad but when I took it for a chug I realised I was mistaken... and clueless ;)

Re: Something went pop - Suggestions please
 

If it sounds like the last time you went go-karting, it's firing on one cylinder. If your still not sure, or not sure which cylinder, start from cold, one hand on each exhaust downpipe, one will get hot a lot quicker than the other.

Re: Something went pop - Suggestions please
 

I would say very frikken hot very quickly. Rather than say touch, I'd prefer to keep the skin on my hands the way they are now and would say 'near' instead. ;-)

Re: Something went pop - Suggestions please
 

To be fair YC said to Gob on it but there was no point, the tank etc was already up so I just pulled the plug out and it made no difference.

Re: Something went pop - Suggestions please
 

:lol: That's more like the technical statement one would expect from YC.

Re: Something went pop - Suggestions please
 

It did say 'start from cold', so quite safe.

On my bike you had about 5 or 6 seconds before they hit the temperature of a hot domestic radiator and you had to let go.

1 and 2 and 3

and 4 and 5....

you see, it's quite a long time when your expecting it to get hot and are ready to let go.

Re: Something went pop - Suggestions please
 

If you say so. ;)