- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Try removing all the existing fuel completley and replacing with new. Some of the higher octane rated fuel can deteriorate and after sitting will not burn! Have had this with chainsaw. It ran on spray from engine start but not on existing fuel.
loosen the fuel line at the throttle body to check for fuel, then you will have to check the injectors for power getting to them and for the ground operation. sounds like you may have an injector problem either not cycling or so dirty they can`t spray properly. the ECM grounds the circuit to open the injectors to spray fuel into the intake to burn.
You've got an air leak somewhere. Running better with the choke closed is the clue. Air is entering somewhere else and by closing the choke you are basically adjusting the air/fuel ratio to be more correct. With a combustible carb spray and red nozzle pipe, you can lightly spray around the carb as the engine runs and see where the running changes and that's your leak point. Keep the spray away from the carb inlet so you don't get misled. The carb could also have gunked up gas deposits. Clean the carb also. Re-check it.
You say it is multi-fuel--- What fuel are you burning in it when you have this problem?
If the fuel is fuel oil, (or kerosene) have you checked the ignitor points? You should be able to hear the arcing sound, and should be able to see the spark in front of the Nozzle. (I do not recommend having Oil being sprayed while you check for spark!! (You could get badly burned!)
Can you see the ignotors from BEHIND the burner gun-- maybe in observation hole in the rear?
You have to have a continuous spark, and that spark has to be spaced very exactly just in front of the spray of fuel--- The Blower fan BLOWS the spark into the path of the oil, to ignite the fuel.
If the ignitor points are INTO the spray, they will carbon up, and short out-- Results NO SPARK-- and results-- no fire-- NO HEAT!
Tell us more after you observe some of the above questions.
Oil furnaces have certain items that routinely go bad or need adjusted to work properly.Some of the common things are nozzle, then gap and location of the igniter,then last is the fire eye. You can see all of these items by pulling the burner tray out. The nozzle delivers the fuel in two ways more or less, first is spray angle then second is the rate or GPH. Nozzles are to spray an atomized mist this means no heavy droplets of fuel. If you have large drops of oil chances are a new nozzle can help you out, please pay attention to spray angle and GPH. The igniter is next, after time they will wear and you can clean the rods and reset the gap to specified distance, that being said it also needs to be a certain distance from the atomized fuel to ignite properly all very important. Then last is the fire eye it tells the furnace that a flame is established and to deliver fuel or flame out and shuts fuel down. These will build carbon deposits at times so simply clean off the deposit and clean the lens with a soft cloth and windex reposition put the burner tray back in hook up the fuel line and off you go.
the fuel will not burn in a liquid form, only a vapor, so it must be mixed with the proper amount of air as it leaves the spray nozzle. You may want to take it apart and gently clean out the nozzle with a soft wire brush.
×