Author Topic: Sudden misfire and its not due to rain (Read 11666 times)

red98 · « **Reply #25 on:** 10 August 2012, 04:10:53 pm »

thats the ones

Bracechenko · « **Reply #26 on:** 12 August 2012, 01:35:51 pm »

Ok so those screws are seized solid and started to round so i cant drain the carbs. I did notice today though that on turning on the ignition i didnt hear the fuel pump clicking like i normslly would do after a few days standing still. Maybe thats because the fuel was fully primed whilst i was checking the plugs on thursday? Fuel pump maybe?

On a separate note, does anyone have a diagram of which HT lead goes to which plug? 1 and 2 are fine but ive lost the numbers for the other 2 and dont know if i have it right!

darrsi · « **Reply #27 on:** 12 August 2012, 01:49:48 pm »

Believe me, you will know straight away if you have your HT leads crossed over, and so will your neighbours, i've done that myself before

Can someone be a bit more descriptive on draining the carbs please as it's something that i've never done before but it was suggested to me to do the other day?

Bracechenko · « **Reply #28 on:** 12 August 2012, 07:20:12 pm »

Ht lead order now correct. Anyone fancy a stab at my fuel pump question?

CRH · « **Reply #29 on:** 12 August 2012, 07:49:07 pm »

chk the filter brace!....very rare for fuel pump to pack up!! and i think it wouldnt run at all if that was down??....and like you say it appears to just be one cylinder down!!!

Bracechenko · « **Reply #30 on:** 12 August 2012, 07:57:58 pm »

Quote from: CRH on 12 August 2012, 07:49:07 pm

chk the filter brace!....very rare for fuel pump to pack up!! and i think it wouldnt run at all if that was down??....and like you say it appears to just be one cylinder down!!!

Oh yeah, forgot to mention that it doesnt run at all now! I'll check the filter but shouldnt i always hear the fuel pump click when turning on the ignition if its been left for a day or so?

CRH · « **Reply #31 on:** 12 August 2012, 08:01:37 pm »

well?....yes! try leaving ig on and tapping it? ....mabe just sticking or bad connection ...or if it is foooked?...then ebay!!!!

CRH · « **Reply #32 on:** 12 August 2012, 08:04:09 pm »

just a thought???????.....you have put your ...kill switch to ..run havnt you!!!!!!!!! cus that will stop pump running!!

red98 · « **Reply #33 on:** 12 August 2012, 08:05:04 pm »

ah........so its not working at all now

are you still getting a spark at the plugs

red98 · « **Reply #34 on:** 12 August 2012, 08:10:19 pm »

Quote from: CRH on 12 August 2012, 08:04:09 pm

just a thought???????.....you have put your ...kill switch to ..run havnt you!!!!!!!!! cus that will stop pump running!!

you might be able to bypass the pump and let good old isaac help you out with that gravity thing he invented,take the two tubes off the pump and join them together,should work,if it runs you have a problem with the pump,try crh`s tip first by tapping the pump

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Bracechenko · « **Reply #35 on:** 12 August 2012, 09:13:45 pm »

Still got a spark and will give the pump a whack tomoz whilst checking the kill switch! Need to sort it as my shiney FZ1 is clocking some grubby and boring commuter miles

CRH · « **Reply #36 on:** 12 August 2012, 09:17:33 pm »

......bugger!!!

Bracechenko · « **Reply #37 on:** 12 August 2012, 09:31:59 pm »

Just quickly checked the kill switch and its fine. Tapped the pump lightly with a screwdriver but no change. I'll still take a closer look tomoz tho, so annoying!

CRH · « **Reply #38 on:** 12 August 2012, 09:37:29 pm »

mabe reds suggestion of linking pipes and letting gravity do its job would be worth a try brace??

.....

Bracechenko · « **Reply #39 on:** 12 August 2012, 10:03:06 pm »

Quote from: CRH on 12 August 2012, 09:37:29 pm

mabe reds suggestion of linking pipes and letting gravity do its job would be worth a try brace?? .....

I'll give it a shot but wouldnt it need pressure to fill up the carb bowls? Ah well, i'll try it tomoz anyway

CRH · « **Reply #40 on:** 12 August 2012, 10:06:50 pm »

no mate!!....inlet manifold vacuum will sort that out!! as you crank it will suck it through!!

Bracechenko · « **Reply #41 on:** 12 August 2012, 10:18:16 pm »

Quote from: CRH on 12 August 2012, 10:06:50 pm

no mate!!....inlet manifold vacuum will sort that out!! as you crank it will suck it through!!

red98 · « **Reply #42 on:** 13 August 2012, 06:50:46 am »

Quote from: Bracechenko on 12 August 2012, 10:18:16 pm

Quote from: CRH on 12 August 2012, 10:06:50 pm
no mate!!....inlet manifold vacuum will sort that out!! as you crank it will suck it through!!

back in the good old days of my youth,with bikes that are now called "japanees classics"you would`nt have a pump just gravity, tank on top of carbs and as crh has already said the vacuum generated from induction should be enough,not saying run it like that just a test to see if pump is faulty

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Bracechenko · « **Reply #43 on:** 13 August 2012, 07:05:31 pm »

Ok an update....

The tank is off and i've removed the in and out fuel hoses from the fuel pump. Now, am i right in thinking that if i turn on the ignition with the bike as it is, the fuel pump should try to pump fuel yeah?

I ask because that's exactly what i did and it didnt do anything at all. The next step is to bypass the pump and see if the bike runs i know but if my understanding is correct, hasnt this already proved that the pump is faulty?

Dead Eye · « **Reply #44 on:** 13 August 2012, 07:49:47 pm »

Could this be a separate issue that has surfaced? If the fuel pump was knackered you wouldn't get one cylinder firing let alone 3, right?

richfzs · « **Reply #45 on:** 13 August 2012, 07:51:38 pm »

Quote from: Dead Eye on 13 August 2012, 07:49:47 pm

Could this be a separate issue that has surfaced? If the fuel pump was knackered you wouldn't get one cylinder firing let alone 3, right?

See

Quote from: Bracechenko on 12 August 2012, 07:57:58 pm

Oh yeah, forgot to mention that it doesnt run at all now! I'll check the filter but shouldnt i always hear the fuel pump click when turning on the ignition if its been left for a day or so?

Bracechenko · « **Reply #46 on:** 13 August 2012, 08:14:21 pm »

As Rich has pointed out, no cylinders fire at all. So, am i right in my thinking that the pump should spin if it wasnt faulty?

CRH · « **Reply #47 on:** 13 August 2012, 08:36:32 pm »

the fuel pump could still be ok?.....you also have a fuel pump relay"....that could have gone down??...thats located under side panel on my foxeye!...thats l/hand sitting on bike!!...should be same on yours ide think?.....

Bracechenko · « **Reply #48 on:** 13 August 2012, 08:39:30 pm »

How do I check if it's the relay or do I just Gabe to replace to know. I don't have a multimeter :-(

richfzs · « **Reply #49 on:** 13 August 2012, 08:41:29 pm »

Yes I think so - unless it's already got back pressure from the carbs, so that it thinks the float bowls are full (in the way that it doesn't click away when you turn the ignition straight back on after switching off).

But having just read your post again properly

I see you've taken pipes of both sides - so yes, I would have thought it should be clicking like a clicky thing.

There's a 2nd hand pump on fleabay for 40 notes, which seems like a lot, but they're asking 80 for new ones