Alright, so I finally got everything done. I removed the pump, re-routed the fuel line and plugged the vacuum nozzle that used to go to the pump (that one was a pain in the ass). The bike runs fine the majority of the time. DP mentioned that I might get less mileage because the outlet for the tank is lower than the inlet for the carbs so the gravity feed won't be able to run through a full tank.
The question is, for anyone that has done this before, how much do you get out of your tank now? Will I still be able to go by my low fuel light? I'm thinking no. I still had about 2.2gal in my tank and leaned hard into a left hand turn from a stop light and the bike sputtered a bit when I gave it some gas at the end of the turn. :-\
It looks like you've answered your own question...
Why did you remove the fuel pump? We've got generic Mikuni ones for pretty cheap.
I know, I have one. [cheeky]
I've been having problems with my fuel pump burning out on me. The stocker did it and the one I got from you did the same thing eventually. Don't know what's causing it but they just get extremely hot and stop working. That could go to show that something else is wrong and I'm just treating symptoms but I'm out of ideas.
Did you keep the "fuel shutoff" valve that is under the seat? Or is it gone, too?
I still have my petcock.
Maybe try bypassing it to eliminate it from your woes? (and try putting a pump back on) We're talking about the weird green thing with fuel in-out and a vacuum line, yes?
I've ridden pongo in serious heat and once I changed the pump, the occasional stalling was cured.
He's got the full manual petcock on that '95 chris BTW...
And a +1 to the 'put some kind of pump back on it eventually' comments.
Quote from: Duck-Stew on April 29, 2009, 04:26:06 PM
He's got the full manual petcock on that '95 chris BTW...
And a +1 to the 'put some kind of pump back on it eventually' comments.
Not to kill sales for a valued sponsor...
but if my vacuum pump fails on my monster I'll add an electric pump.
The pump also keeps fuel supply more consistent. If bypassing the pump fixes the problem, replace the pump. If bypassing the pump does not, put the old one back on.
Quote from: howie on April 30, 2009, 12:27:24 AM
The pump also keeps fuel supply more consistent. If bypassing the pump fixes the problem, replace the pump. If bypassing the pump does not, put the old one back on.
It hasn't really been hot enough to test out whether or not it solves the problem. The original problem (acting like it's out of gas) only occurs when it's hot (90+) and it's been pretty cool recently. When it's not hot I have to run the bike some 100+ mi to get the problem to show up and I haven't had the time to run the bike for that long.
Bypassing the fuel pump has caused other problems though like the bike sputtering after turns when I've got about half a tank of gas. Lol, who said that there was someone who has been running w/o a fuel pump for thousands of miles w/o incident. I know someone said it. [roll]
This weekend I'll take it apart again and put the pump back on and see if I can put in a couple hundred miles for a test ride.
Quote from: erkishhorde on April 30, 2009, 09:09:32 AM
It hasn't really been hot enough to test out whether or not it solves the problem. The original problem (acting like it's out of gas) only occurs when it's hot (90+) and it's been pretty cool recently. When it's not hot I have to run the bike some 100+ mi to get the problem to show up and I haven't had the time to run the bike for that long.
Bypassing the fuel pump has caused other problems though like the bike sputtering after turns when I've got about half a tank of gas. Lol, who said that there was someone who has been running w/o a fuel pump for thousands of miles w/o incident. I know someone said it. [roll]
This weekend I'll take it apart again and put the pump back on and see if I can put in a couple hundred miles for a test ride.
Sound like you found out about how low you can go.
ive been trying to run down a problem im having.2001 m600.takes 15 to 20 times to get it started when its cold.if i give it choke or gas it just turns over.without choke and throttle it tries until it fires.whats with the petcock and vacuum i have no idea how to troubleshoot.also ive never heard this fuel pump prime.is it at stock a gravity feed? i dont know much mechanically about bikes.any help is appreciated.
The fuel shut off is vacuum operated. Assuming it is working, the engine is started, vacuum is applied, fuel flows. The engine is shut off or stalls, no vacuum, supply is shut off. The fuel pump is a mechanical pump that is also vacuum operated. You will hear the electric pumps on fuel injected bikes prime.
Erkishhorde, how's the bike doin?
The fuel pump is vacuum operated on the carb powered monsters. The petcock is also vacuum operated.
Hi hi, update for me that I posted in champion's other thread since he mentioned me. :P A little addition too. I don't think my fuel pump is my issue. I did buy 1 last pump, though, which I will put in once I get my bike back from Speeddog just to round everything out and eliminate every single possibility that anything could be wrong. :P
Quote
Oh, sorry about that.
I had gotten a suggestion to check the grey pods like Howie mentioned and shrugged it off after I checked the one on the right and everything was fine. Problem was, I had an old hose that split and fell off the LEFT grey pod. bang head Finally found that when I started pulling my air box to replace the fuel lines.
That helped the stalling out at speed a little bit but I still had fuel issues. Now, though, I ran into fuel issues where the bike would sputter out and die like it was out of gas randomly whenever I had more than 70mi (about 1/2 tank of gas) on the clock. Since I'd replaced/ rerouted nearly all the fuel lines and had replaced the fuel pump and filter within the last 4 months I decided that there was likely something floating in the tank. I've since dropped off my tank for a cleaning/ POR15 rust treatment as well as a valve adjustment (I was due anyway) and have not picked it up yet so I don't know if this will nail down my problem yet.
I have very high hopes but nothing is guaranteed. Oh, another factor that pointed me toward something floating in the tank was that my fuel issues would become more frequent when I more miles on the clock (less gas in the tank).
Quote from: ducpainter on April 29, 2009, 05:22:41 PM
Not to kill sales for a valued sponsor...
but if my vacuum pump fails on my monster I'll add an electric pump.
I'm running a small electric pump on my 97. I think we have been through this before OP. Didn't you just put that pump in like 6 months ago? Are you sure the pump is getting vacuum and the line isn't pinched? What about the fuel lines, are they collapsing or pinched in any way?
Yup, we've been through this before. :P Hopefully I'm done with it now. Waiting to get the bike back from the shop to find out. I've replaced the vacuum lines. Pretty sure it's not pinching or binding. Funny how Autozone calls it windshield wiper fluid lines... [roll]