Fuelling/Air odd problem help pls
- Thread starter Fanum
- Start date
Hey, just a suggestion but did you check your tank? I had a tank rot on me and it kept killing left fuel injectors. Curiously, the rust was near the fuel pump. I've a new tank now. It was rust particles in my fuel that was doing it. Eventually discovered it and then there was fuel everywhere and a big hole in the tank! Flash of the gap welded it for me. Ended up getting a newer tank. Hth.
Edit. reread that and that didn't help!
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Edit. reread that and that didn't help!
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Sadly, no
Tank rot......possible, but the several changes of fuel filter now show clean petrol, and when I had the pump out the other week, i peered in and it looked ok (but of course, you can't see that much in there)
It seems odd the the problem re-occurs on the left side if it was crap in the tank.......ok, it could have just been chance that it did, but the odds are after three or four short periods of running well, the crap would have blocked the RHS at some point, or even both sides
I'm at the stage now where I'm going to take it to the guru again......I could take all sorts of bits off one by one but my general incompetence is likely to make matters worse, and changing bit by bit to eliminate them would add up to be far more expensive than a day spent at St.Eptoe's
Hey. If i'm correct, we gotta get a good thread on cleaning out the fuel filler 'rain away' tubing. Just sounds like my r850r. The other one is the same. Water and bikes... I know there is a thread but I'm working off a smart phone app.
I hope you don't have a rotten tank. Really do. I've still got that bit of black plastic floating inside mine since the time I changed the fuel filter for the second or third time. Pity I didn't cop it earlier. Then I bought a GSA after the clutch pivot armbroke
anyway, I can't figure out how to sort the Corbin on the r850r. Awful colour with the blue. Recon it'll fit me better on the blue one.
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I hope you don't have a rotten tank. Really do. I've still got that bit of black plastic floating inside mine since the time I changed the fuel filter for the second or third time. Pity I didn't cop it earlier. Then I bought a GSA after the clutch pivot armbroke
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I just re read the thread. Nothing bazarre. Fanum might have a rotten tank. Rip
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rob's new bike
Registered user
May not be of any use, but my old gpz had a similar sounding problem of only firing on two at higher rpm. Thought the coils were dead so replaced them but no change, even thought it might have been the battery as it was slow to start. Turned out the alternator was on its way out an wasn't supplying enough juice to charge the battery and produce a decent spark at higher rpm. The thing idled fine the whole time
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Sent from my iPhone 4 using Tapatalk
Probably ruled out by the fact that when we swapped the injector, the bike then ran fine for 100 miles on the way home. Thanks though
when you changed the coils did you leave the replacement on? if not id try it with another for at least a spin round the block.does the fuel injection run off a sub harness? if so can you borrow another to try?
Any update Bill?
Yep, kind of
I know there's one problem that it has for sure now...compression on the left side.
I gave the chappy round at the local car garage a drink to stick a compression gauge on it, as I couldn't remember what the figure was when Neil did it and I remember we didn't rev it much above tickover....immediately after that, we thought we'd cured it because it ran when the replacement injector was stuck in.
So......the left side reads around 7 bar at most, and the right side reads around 10.
That's what I know so far......what i don't know is why it's low, although this was the side that went crunch whimper whimper
What I also don't know is if the compression being that low would cause the symptoms we've gone through in this thread
I suspect they would, but regardless of that, I do know it's something I have to get sorted, as the tech data seems to say that 'good'=above 10 bar, 'normal'=8.5-10 bar and 'poor' is anything below 8.5
Without a valve compressor, I suspect this is beyond me, so I'm waiting for St Eptoe to fit me in and trying my hardest not to spend any more money from the contingency fund so I can throw what is needed his way
PS fuel in filter still running clear and bright, so I believe the rotten tank idea is out.
Pauly S
Registered user
If Neils very busy
Whip the head off, and bring the head over and we'll de valve it, ive got a valve compressor,we can lap the valves in and rebuild.
Wont cure fecked rings though.
But you can always drag off the barrel, and we'll have a look at the rings too.P
Whip the head off, and bring the head over and we'll de valve it, ive got a valve compressor,we can lap the valves in and rebuild.
Wont cure fecked rings though.
But you can always drag off the barrel, and we'll have a look at the rings too.P
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