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SuzukiSavage.com
/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> large backfire, now it won't run. /cgi-bin/YaBB.pl?num=1215264036 Message started by Jackhammer on 07/05/08 at 06:20:35 |
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Title: large backfire, now it won't run. Post by Jackhammer on 07/05/08 at 06:20:35 well I had gotten all my issues worked out on my 98 until yesterday on the way home. Going about 55 I let off the gas to slow for a light. Bang!! One loud backfire, then when rpm's came down to idle the bike shut off. It will now start up and run, but only if I keep it at least at 1/4 throttle, and even then its stumbling some. Soon as I let off it dies. I don't have any clue..... It was running perfectly before. Any ideas?? thanks guys, happy 4th |
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Title: Re: large backfire, now it won't run. Post by Brad_THMP3R on 07/05/08 at 06:44:35 sounds to me like your pilot jet got clogged. caused it to go way lean, gave you the howitzer, now it's not feeding any fuel. the 1/4 throttle is about where the main jet starts working. Sounds like its time to tear open the carb and go nuts cleaning! just be careful to not get cleaner on the diaphragm. If that turnes out to be the problem, you may want to think about installing a fuel filter if you haven't already. While you're in there, it's a good idea to replace the 4 wimpy screws that hold the top of the carb on with bolts. It just makes it easier to tear into it later ;) |
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Title: Re: large backfire, now it won't run. Post by Sandy Koocanusa on 07/05/08 at 06:47:50 How is the carb set up on your bike, and what were the issues you were working out? In other words, what changes have you made lately? I'm not likely to be the guy with the answers, but when he comes along, I'll bet he's going to ask you that. You might as well include it here now to save some time later. EDIT. Oops. He came along while I was typing. Disregard me and my rambling. |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/05/08 at 07:08:26 Well I was having mid-range running issues which I was able to clear up by cleaning the carb and removing the white spacer. It has been running perfectly for about 2 weeks until this. I suppose it could be a clogged pilot jet, that would make sense. I guess your right, its time to tear the carb apart again.......ughhhh |
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Title: Re: large backfire, now it won't run. Post by bruno on 07/05/08 at 10:10:08 what size are the allen bolts for the top and bottom of the carb and where's the best place to find them . |
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Title: Re: large backfire, now it won't run. Post by Brad_THMP3R on 07/05/08 at 11:42:35 My 04 has cheap phillips screws. just take out what you have to Home Deposit or unLowes and match em up. If mine were hex heads I'd leave them. Just my 2 cents ;) Good Luck |
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Title: Re: large backfire, now it won't run. Post by slyfoxS40 on 07/05/08 at 12:27:04 6A5A494C784E415B5C4D5A280 wrote:
IMHO I would support a local hardware store as in a True Value or Ace for the phillips screws instead of one of those big box places. The local hardware stores give better personal assistance, unfortunately :( many have closed due to the big box. |
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Title: Re: large backfire, now it won't run. Post by T Mack 1 on 07/07/08 at 06:45:15 Just as a "what-if" ..... you might want to check the compression. Check the sparkplug color while you have it out too. |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/07/08 at 07:19:31 Well, Yesterday I pulled the carb and cleaned everything up really nice. The Fuel in there was a nasty rust color, even after cleaning the carb out only a few weeks ago. I'm assuming this is due to rusting on the inside of the tank. I'm going today to get an in-line clear fuel filter to add in. Anway, after cleaning out and putting the carb back together. The bike ran fine yesterday up and down the street a few times. I figured it was fixed and everything was good. Well this morning i went out and realized that i had left the key on and the battery was dead. I put the charger on it for a bit. Then it fired up, but after a few seconds, started sputtering, and fuel started POURING out of the carberator. I couldn't tell where it was coming entirely but i know some was coming out of the carb vent tube. I know it wasn't doing this yesterday on my test ride because i inspected it thoroghly afterward and even let it run for about 10 minutes with no problems/leaks. I didn't have time to look at it this morning, so i jumped in the truck and came to work. I'll inspect closer when i get home, but does anyone have any ideas what the issue could be? Thanks |
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Title: Re: large backfire, now it won't run. Post by Bleemus on 07/07/08 at 07:22:21 I am no expert mechanic but I had that happen once and it turned out to be the float needle was sticking. Perhaps some tank rust is keeping it open? |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/07/08 at 07:30:38 yeah, that could be it. The fuel does look pretty nasty. I have a feeling i'm going to have to put that fuel filter on thier, then clean the carb AGAIN. The good news is, I think i can have the whole carb apart, cleaned, and back together in about 30 minutes now. Back to the drawing board. I'm loving this savage, but at this point i'm really wishing it was fuel injected........ |
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Title: Re: large backfire, now it won't run. Post by verslagen1 on 07/07/08 at 09:06:40 53787A72717874747C6B190 wrote:
And you'd rather be cleaning fuel injectors? Make sure you drop the float valve screen and clean out the crud that builds up. |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/07/08 at 09:41:19 4A594E4F505D5B59520D3C0 wrote:
Make sure you drop the float valve screen and clean out the crud that builds up.[/quote] Thanks Verslagen, That is somethingi did not do last time i had it apart. Is this something i can do without taking the carberator completely off the bike? I'm assuming once I take the cover off and get the float out, it right there underneath? |
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Title: Re: large backfire, now it won't run. Post by verslagen1 on 07/07/08 at 11:22:16 0F24262E2D2428282037450 wrote:
I too opted not to change it out last time I had it apart so I'm not exactly sure how other than it does come out (something about a f'ing $35 part and it's working just fine why mess it up) And I believe that it may be causing the issue I'm having now. As I need to run on res all the time. I've made this recommendation many times but haven't heard whether it was useful to do or not. I'm all set to get parranoid about it soon (some long trips and I'll want to have reserve available) so I should work on it shortly and confirm for myself. |
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Title: Re: large backfire, now it won't run. Post by Charon on 07/07/08 at 15:08:00 It's a good bet the fuel tank needs to be cleaned. That nasty-looking fuel in the carburetor came from the tank. By way of the petcock and screen, so they need to be cleaned too. It won't get easier if you put it off. Running on RESERVE probably makes it worse, because all the crud settles to the bottom of the tank, just where RESERVE gets its fuel. |
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Title: Re: large backfire, now it won't run. Post by Trippah on 07/07/08 at 19:39:16 The fuel tank is made of light (thin) ((Cheap?) metal which im my case started leaking. had to do a coating job. Sounds like you may need to clean out the tank, and which point you probably should coat with kream or similar treatment. Good luck and keep us posted. |
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Title: Re: large backfire, now it won't run. Post by justin_o_guy2 on 07/07/08 at 23:13:59 I keep hearing about fuel problems, enough so that I am considering pulling & emptying the tank, checking the internal screen, having a good look down in there & generally trying to head off these problems. Since everything is polluted with ethanol ( except me, dangitt) maybe coating the tank before it develops metal cancer would be a good idea. I've wiped Ospho on steel plate that wasnt rusted & left it for 3 days & it turns black as night, maybe that would be a good thing to use. Downing it for 3 days, tho.. I dunno,, what a downer |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/08/08 at 05:14:47 Well, I put the fuel filter on last night, and cleaned the carb again (including the float screen this time.) everything seems to be running great now with no issues. I rode in to work this morning with no problems. Thanks everyone for all the guidance. I think you guys are right about the tank cleaning. Hopefully the fuel filter will continue to help me out as far as gunk getting into the carb, but i'm sure its gettin nasty in the tank and in the petcock. I'll look into doing that when i get some time. Thanks again, Brandon |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/11/08 at 05:33:31 AHHHHH, its back...... Its been riding perfect all week. I went to fire it up to come to work this morning, and it did the exact same thing. Started shooting gas out of the nipple on the right side of the carb and wouldn't stay running. I cleaned the whole carb thoroughly on monday, and installed a fuel filter, so i don't think anything is gunked up in there. I loosened the screw and drained the gas out of the bowl in the carb this morning. Then tried to fire it up again. As soon as the bowl filled back up, it started spewing gas out of the nipple again. Same as before, it won't stay running unless i keep it at least 1/4 throttle. Even then it sputters and tries to die.......... I'm gettin pretty frustrated with this thing. Is there supposed to be some kind of hose/line on that nipplee on the carb?, because there hasn't been anything on it since i baught it... |
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Title: Re: large backfire, now it won't run. Post by youzguyz on 07/11/08 at 05:42:38 If those nipples are the ones angled up, one on each side, then, YES, there should be hoses on them. Those are the overflow outlets. I'm not sure if NOT having the hoses on messes with how they work. Someone else will know though. What it sounds like to me is a float valve that isn't working right. Bowl fills up, float rises and closes valve to incoming gas line. If that valve doesn't close, gas goes out the overflow tubes. |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/11/08 at 05:51:16 Ok, so there are two overflow tubes. yeah, the one on the right side just doesn't have a line on it, but thats an easy fix. I don't think thats the problem at all though. What you are saying makes perfect sense and that has to be it, but i took the float and slide out on monday and cleaned them very well.... they were moving very freely. I guess i'll try taking the bowl off again, without removing the carb, and seeing if the float is perhaps stuck again. What should i do if that is the problem and it just keeps getting stuck? get a new slide? Thanks for your input youzguys |
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Title: Re: large backfire, now it won't run. Post by 4carbcorvair on 07/11/08 at 06:37:57 22342E213C2E22215B0 wrote:
Yup. Make sure there is no gunk on the float needle or seat. Also make sure the float does not have a leak, make sure there is no fuel IN the float. If there is, you need to replace the float. And check the float adjustment specs. |
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Title: Re: large backfire, now it won't run. Post by Ian on 07/17/08 at 10:55:02 Anyone have a part number for a recommended fuel filter (the see-through kind)? i thought i saw one on another thread but can't find it. |
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Title: Re: large backfire, now it won't run. Post by Jackhammer on 07/17/08 at 11:10:41 You don't really need a part number. If you go to any parts store they should have one. I went to CarQuest, but anywhere should be good. Just tell them you want a clear fuel filter to fit 1/4'' fuel line. Carquest had 2 different sizes. I got the larger one in hopes that it would last longer before i had to change it. |
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Title: Re: large backfire, now it won't run. Post by sidny4 on 07/17/08 at 12:17:33 What can be done to help prevent the tank from rusting and gunk building up in the carb? Sea Foam in every gas tank? |
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Title: Re: large backfire, now it won't run. Post by Max_Morley on 07/17/08 at 12:46:07 If you live where they use ethanol added fuel the seafoam has even more alcohol in it which is counterproductive in my opinion. I ride 9-12 months a year (so mine doesn't sit a lot) and the inside of my tank has soft rust colored stuff in it. I do use seaofam but only a couple times a year. !!Warning, now going Off topic, WA is moving toward ethanol based fuels as we grow lots of plants here that that be brewed to make booze. In my learned opinion ethanol from plants is a very expensive way to "lessen our dependence on foreign oil", as lots of fuel of some kind is used to prepare the soil, plant the seed, fertilize it, water it, harvest it and then use more energy to boil it and condense the booze and haul the mash away for animal (cows mostly) feed stock. Because it has less BTU's per lb. than gasoline, we burn more of it to move our rigs from A to B. Bio-diesel does make sense as a non-food plant can be used to provide the oil from pressing and the leftovers are still usable as animal food base. Better yet the license plate frame on my bagger says " 50 MPG and one less car" End of rant. Max |
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