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Old 04-27-2010, 09:19 PM   #16
johnjen
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Don't forget the pressure regulator. While there haven't been many reports of failure, there have been a few.

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Old 04-27-2010, 09:56 PM   #17
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Quote:
Originally Posted by bananaman
The fuel pre-filter... it's a woven nylon, with a steel spring inside. Both ends were open. I stapled one end, and used baling wire to sew the other end. I don't know why it came apart.
Is there any chance that some of that nylon got into the fuel lines?
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Old 04-28-2010, 12:19 AM   #18
Zoef zoef
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Quote:
Originally Posted by johnjen
Don't forget the pressure regulator. While there haven't been many reports of failure, there have been a few
Quote:
Originally Posted by bananaman
The fuel pre-filter... it's a woven nylon, with a steel spring inside. Both ends were open. I stapled one end, and used baling wire to sew the other end. I don't know why it came apart
Sir,
If pressure regulator fails, ie pressure much too high -> very low flow of petrol, the high pressure could also lead to fuel pre-filter failure.
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Old 04-28-2010, 08:22 AM   #19
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Quote:
Originally Posted by wrysingfeenix
Is there any chance that some of that nylon got into the fuel lines?
It didn't look like any of the nylon had come off, but I have no idea why it would have burst at both ends. Does that nylon break down over time? It never seems to get very hot... even sitting in the sun, the tank is only "warm."
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Old 04-28-2010, 08:25 AM   #20
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[quote=Zoef zoef]Sir,
If pressure regulator fails, ie pressure much too high -> very low flow of petrol, the high pressure could also lead to fuel pre-filter failure.[/quote

Hmm... could you explain this to me? Are you saying that the fuel pump could try to suck extra-hard, thus somehow crushing the pre-filter?

After this experience I'm wondering if on another long adventure, I should pack a spare fuel pump? They're not very big and they don't look hard to replace.
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Old 04-29-2010, 03:28 AM   #21
GeorgeinVA
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[quote=bananaman]
Quote:
Originally Posted by Zoef zoef
Sir,
If pressure regulator fails, ie pressure much too high -> very low flow of petrol, the high pressure could also lead to fuel pre-filter failure.[/quote

Hmm... could you explain this to me? Are you saying that the fuel pump could try to suck extra-hard, thus somehow crushing the pre-filter?

After this experience I'm wondering if on another long adventure, I should pack a spare fuel pump? They're not very big and they don't look hard to replace.
A fuel pressure regulator failure can result in high or ow pressure. If a high pressure failure you may pop a line off, rupture a line, or split the aluminum housing of the fuel filter. I have seen all three happen from quick disconnects that were not plugged and clamps left on lines, return line that is.
As for the nylon pre-filter, they split on the ends fairly regularly and should be checked every time you change the filter.
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Old 04-29-2010, 03:54 AM   #22
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I don't know if this helps, but.... I had a similar problem with a car. I had all the same indications as you. Not enough fuel thinks I. Screw about with mixture settings (eay on older MB's). No good got worse. Found damaged fuel line. Easy fixed. Still no go, much the same as your problems. In the end found that it was too rich. Leaned it off, goes great. In the mean time it had fouled spark plugs, had to be replaced. (Were they all black and sooty?) I am thinking in your case, bad fuel or fuel with water in it. Ethanol based fuel (pet hate) which has attracted too much water? Me thinks; if it is mechanical, the fault will be there all the time. What is transient? Fuel. Good luck.
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Old 04-29-2010, 05:18 AM   #23
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Quote:
Originally Posted by koenig
I don't know if this helps, but.... I had a similar problem with a car. I had all the same indications as you. Not enough fuel thinks I. Screw about with mixture settings (eay on older MB's). No good got worse. Found damaged fuel line. Easy fixed. Still no go, much the same as your problems. In the end found that it was too rich. Leaned it off, goes great. In the mean time it had fouled spark plugs, had to be replaced. (Were they all black and sooty?) I am thinking in your case, bad fuel or fuel with water in it. Ethanol based fuel (pet hate) which has attracted too much water? Me thinks; if it is mechanical, the fault will be there all the time. What is transient? Fuel. Good luck.
hmmm...

When I'd add gas, it would bog down, as if it was WAAY too rich. But isn't the mixture controlled my the fuel injector controller thingy?
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Old 04-29-2010, 05:20 AM   #24
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did you readjust your TPS voltage when you swapped Bananaman?

maybe its not seated correctly in the slot that turns it?
I would think it being bad or badly adjusted would do as you describe.
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Old 04-29-2010, 11:38 AM   #25
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Quote:
Originally Posted by mouthfulloflake
did you readjust your TPS voltage when you swapped Bananaman?

maybe its not seated correctly in the slot that turns it?
I would think it being bad or badly adjusted would do as you describe.
Now you lost me. TPS voltage adjustment?

The only things I swapped were the fuel filter and the plugs.
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Old 04-30-2010, 05:21 PM   #26
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Quote:
Originally Posted by bananaman
Now you lost me. TPS voltage adjustment?

The only things I swapped were the fuel filter and the plugs.
http://advwisdom.hogranch.com/Wisdom/tps3.1.pdf
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Old 05-02-2010, 10:23 PM   #27
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BANANAMAN WHAZZUP

Did you find the problem?
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Old 05-03-2010, 07:49 AM   #28
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Originally Posted by BobLoblaw
BANANAMAN WHAZZUP

Did you find the problem?
Sorry- last week was super-busy. I'll take the pig to the dealer in Beaver Dam this week.

I live an hour away from the closest dealer, and the only dealer I trust. There are a few mechanics here in Madison, but I prefer Jason & Co in Beaver Dam. The process is complicated- I have to take the bike to my office, where I have a loading dock. Then I have to run home and get my truck. At my office I need at least one other person to help me, so that I don't drop it in the truck.

Stay tuned...
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Old 05-18-2010, 10:54 AM   #29
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Art, the owner of Mischlers BMW: "Its running on one cylinder. Intermittently." He tapped the exhaust pipes. "The left one."

"You cracked the coil when you submerged it." Referring to the river in Panama.

Suddenly I realized that this problem started... in Ecuador. In a pissing rain from the Colombia border all the way to Quito. So it's probably a cracked coil or a bad sparkplug wire.

They'll know more on Thursday.
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Old 05-19-2010, 03:27 PM   #30
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