Question about 1995 BMW R 100 RT

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Idling issue A while back I had some gas vent problems which I solved by disconnecting the hose to the charcoal canister. The bike worked like a charm until about 2 weeks ago. After about 15 minutes of riding, my idle starts to get all screwed up by going really low and stuttering. I can sort of notice while I'm riding at speeds under < 40 MPH because the bike is becoming very twitchy. Just a tiny movement of the hand makes the bike leap or sometimes I can't feel the pull that I should be getting when I open the throttle. I checked the charcoal canister and the intake hose is still connected to the charcoal canister. When this happens, I open up the gas lid but it doesn't help all the time. Sometimes I will open it and close it and the idling problem will be fixed, but also sometimes I can do it and it returns to running poorly about 5 seconds later.

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Collapsed fuel line.

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First check to make sure that gas is good and that filters are not plugged. (I had this problem w/ my truck and it was "crumb" in the line that clogged before filter) Also check any vacume lines. It sounds like a pressure problem and may be a pressure regulator.(may be electrical or mechnical or vacume) I am not too hip on FI but on this forum there are several people try to contact Wrider or Sev, but check the simple stuff first.

Posted on Nov 20, 2008

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1 Answer

Definition of po1441 trouble code


P1441 Evaporative emission control system very small leak, positive pressure.
The problem may be that the purge control valve which is part of the charcoal canister has a slight leak.
If the control valve doesn't completely close, there will be flow during non-purge.
Vacuum drawn through the small hose to the charcoal canister is what opens the purge control valve.
Make sure that there is no vacuum to the smallest hose connected to the canister at idle.
Make sure the little hose is not kinked or pinched in some way that would hold vacuum to the purge control valve.
The canister is purged above 35 MPH, never at idle.

P0446 EVAP canister vent valve

The P1441 and P0446 are related.
When you fix the P1441 the P0446 may go away also or it may need a new vent valve.

Jul 22, 2014 | Cars & Trucks

1 Answer

P0446evap code,check engine light on,cant pass smog


The E-VAP system is pretty simple but if the problem is electrical, You may need to let the dealership repair it. The P0446 code does refer to an observed issue with the "Vent Solenoid". You stated that you replaced the purge and vent solenoid. Did you check the vent solenoid and the charcoal canister for loose carbon material and/or debris? If the charcoal canister failed and is allowing carbon material to travel into the vent solenoid, it will jam and damage the vent solenoid. After you inspect those parts. inspect the two wire plug that attaches to the vent solenoid. Look for a broken or damaged wire. If I can answer anymore questions, please write back, good luck.

Mar 08, 2014 | 2007 Chevy Cobalt - Sedan, with spoiler -...

1 Answer

Gas tank 2004 ram gas tank problems


charcoal canister aka evap canister bad , line is plugged so the vent hose from the fuel spout cant breathe so it will purge fuel back out

Jan 04, 2014 | 2005 Dodge Durango

1 Answer

Can't fill the gas tank, I had the check valve replaced in the gas line and it work once and now it's back to not letting me fill it. I unplugged it but would like it to work. Any ideas what it may be?


fuel vent Charcoal canister will make it difficult to fill the gas, this canister vents the gas tank and if you overfill the tank then it screws up the Charcoal canister and will need to be replaced, I just found an old canister from the used parts place and had my mechanic replace it, went directly to the gas station and presto no more problem filling gas. DO NOT overfill your tank after replacing canister!

Sep 05, 2013 | 1999 Oldsmobile Intrigue

2 Answers

2000 hyundai elantra evap charcoal canister problems repaired


replace charcoal canister and prob canister close valve as well to be safe.

Dec 19, 2012 | 2000 Hyundai Elantra

1 Answer

Hyundai XG350 will not take gas


Sally, the problem is the charcoal vent system. A new one will cost about $150.00 but......... the total fix will require the cleaning of the vent valve on the gas tank. You will find small pieces of the charcoal (pellet size) in the valve. You must look close to see them. Think pencil lead size. Remove them and exercise the valve some. The valve is a push in and out type. I don't understand the reason the charcoal pellets make their way to the vent valve at the tank but they do because I found them in mine. They must travel out of the canister and up and over a dry loop in the vent line to get to the vent valve at the gas tank. This would take some vacuum to cause the pellets to travel. It also requires the poor construction of the factory instaledl canister vent outlet because there is a filter at the canister that is supposed to contain the pellets. This will verify you have gotten all the charcoal pellets out. The charcoal canister (located up under the fender is easy to replace). You can make a cheep fix by installing some scaring pad material in the vent connection line at the canister but that doesn't address the charcoal being plugged. This will keep the charcoal pellets in the canister.
You will have to drop the gas tank partially to remove and clean the vent valve. Keep in mind you are working on a gas system that is very dangerous. i.e. it doesn't like spark's. Only begin this job with a tank that is all but empty.
You can find diagrams of the vent system on the internet. So you can identify the parts I have referred to here.
I have done this work. It is not easy. It is an under the car and also through the car trunk operation. You will have to remove the gas pump via the trunk from the gas tank. Remember about the spark issue when you do this part of the job.
This problem is very common with Hyundai's and several other cars. It is because the manufacture has reduced the gas fill piping to roughly a 3/4" pipe and installed a government requied venting system that you have this problem. You will see that at the tank the opening is as fill lines used to be about 2" and at the gas nozzle area also about 2'" but the rest of the line is no larger in diameter than the gas pump nozzle. That is not to place the blame all on the car manufacture. You see it is always the government that is behind our frustrations in life. The EPA has told the car companies that the gas vapors we used to smell when the car was being fueled are no longer aloud. So the need for the charcoal vent system to capture the vapors of the gas as fueling is being done. Some car people have said that if you never overfill your tank these fueling problems never happen. i.e. the charcoal in the canister never gets wet with liquid gas only vapors. Note the warning stickers and owners manual cautions to stop the filling process when the gas nozzle clicks off the first time. Sally you will know if you have not followed this advise and fueled your car clicking the nozzle several times after the first nozzle stop. That is the way we used to fuel the cars in the good old days. However, I do almost all of the gassing of my car and I had the problem. So I say the car manufacture is responsible for the issue with poor designs in the system.
Lastly I can't stress enough the importance of not doing this job as a back yard mechanic operation because of the volatility of the gas. It can and will blow up if not handled correctly.
Good luck!!!!

Jun 05, 2012 | 2002 Hyundai XG350 L

1 Answer

My 2000 blazer will not allow me to pump gas into the tank without just barely easing it in or it kicks the gas pump off or over flows,as if the tank is full. It takes forever to put gas in the tank.any...


how long has the check engine light been on?

The vent solenoid is likely stuck closed. If you look under the vehicle you will find the charcoal canister back by the gas tank. There will be a large rubber/plastic hose coming out of the canister. On the other end will be the vent solenoid. Should be up under the spare tire area.

Disconnect the hose from the vent solenoid and then try to fill the gas tank. If there are no problems filling with the hose disconnected replace the vent solenoid.

Aug 31, 2011 | 2000 Chevrolet Blazer

1 Answer

Service engine soon light came on, replaced gas cap it went off but a week later it came back on, when it try to fuel the truck it spill the gas back out like it is a full tank


One of the most common causes, is blockage in the venting system from fuel entering the vent lines and into the charcoal canister, the fuel gets absorbed by the charcoal canister causing it to swell and block vent lines. the gas tank contains both fuel and air. when you fill it up the gas displaces the air and the air has to go somewhere. but the air that is displaced is full of gas vapor so the gas vapor goes to the vent lines and into the charcoal canister, when the charcoal canister swells up it prevents the air from escaping the tank, canister could be clogged,canister filter may need replacement,electrical connection to the close valve may be open,canisterf might be damaged,purge valve from canister might be clogged,vent hoses might be clogged, the vent hose could be clogged, or the vent hose may have a kink. all this is caused by overfilling the gas tank, getting that last drop of gas in the neck of the fill tube.
good luck!

Aug 11, 2011 | 2005 Nissan Titan

2 Answers

Gas pump keeps tripping off often


you have a bad charcoal canister. Go underneath the left rear of the car, pull the big hose off the charcoal canister, and if charcoal come out of the hose, replace the canister. This is a common problem w/Hyundai and Kia.

Oct 14, 2010 | Hyundai Sonata Cars & Trucks

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