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Post by lawless211 on Jan 23, 2016 20:53:52 GMT -6
JR The new intake manifold came in, so I took off the old one with the crack in the rubber, looked inside, and saw that it so much worse than it appeared on the outside. The metal had a crack a bit longer than an inch. Everything is running great now. I wish I would have noticed the crack earlier, but I am glad I replaced the parts that I did and updated the fuel petcock style. The only question I have for that is.... There wasn't a convenient place to put the in-line valve where I can get to it easily, but will just have to pull the seat out. Should I close it off everytime I park, or at the end of the day, or just if its going to sit for a couple days? Other than that, I am very thankful for all the support. This is a fantastic resource for all scooterers...is that a word? Thank you guys for what you do.
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Post by lawless211 on Jan 18, 2016 21:47:43 GMT -6
It's normal to see an air pocket in high spots along the fuel path. If you're suspicious of fuel flow you can remove the line from the carb or outlet side of the shutoff valve and let it drain into a container. You can even loosen the bowl drain and test right from the bowl if you'd like. I've done mine before by watching a timer so it flows for exactly a minute, then measuring the fuel when I was really suspicious of the fuel getting to my carb. Just did this last week actually. With 3/16" fuel lines I was getting 160ml per minute with straight down fuel hose routing. With it routed the best I could seem to get it (because I have a similar issue where the location of the petcock outlet makes it go mildly uphill at first) I got 140ml/min. Checked with the fuel cap off, same. I checked from the drain as well and got very close to the 140ml/min. Not really necessary, but if you can't tell that it's enough by watching it or find that sort of thing interesting it's an option. Surging idle could be a sign of a vacuum leak. You may want to double check that you haven't created any while rearranging your vacuum setup. A lean idle would also be likely to cause RPM to hang at least slightly if you rev a little then let off. If you indeed had a fuel supply issue that is cured now, readjustment of the mixture screw may be required. Fuel vapor could be getting into the vacuum hose to create moisture. It's not old fuel is it? Air filter clean? Any backstory we need to know, like the scooter sat for a long time or has never ran well since you owned it etc...? 90GTVert The longest it has sat is the past 2 weeks that I can't get it to work, but I have been starting it here and there when working on it. Yes, i replaced it with new fuel. It ran great for awhile, but have only had it since July when I got it new. There is a small crack in intake manifold which I know is bad and could cause these problems, but I have been plugging it up. I might as well wait for my new one which should be here soon. I believe it happened when putting the new carb on. I feel like it shouldn't be that troublesome if I am plugging it up. Tonight when I finally got it to start, I noticed it wasn't plugged well anymore so I shut the scooter off. I removed the plugging and white smoke was coming out of it. Would that smoke be in there anyway, or is that another problem? Anybody know a scooter tech in DFW? Otherwise, I will continue to rely on you guys.
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Post by lawless211 on Jan 18, 2016 21:39:49 GMT -6
lawless211 remove the gas cap and see if the fuel flows better. JR JR No, not anything noticeable.
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Post by lawless211 on Jan 17, 2016 21:36:16 GMT -6
JR cyborg You guys are giving me great feedback and I am very thankful and I am glad I am trying to fix this myself, but I am about to lose it. I set up the petcock to run without the vacuum, drilled it out, cleaned it out, set up an in-line cut-off valve, ran hose from intake to carb, plugged off air line on petcock. The gas line gradually drops down to carb so gas should run down. I had to give it some assistance to get it started. I definitely got her running the best since we started this, but wasn't great by any means. There were still air bubbles making their way up the gas line, maybe because the first inch of gas line is tilted up a little bit, but i would think the tank pressure would get it past it no problem? It's the angle of the petcock that makes it tilt slightly. I saw a tiny bit of moisture in the line from manifold to carb. A very small amount, but still some. She ran without me toying throttle for a little while, but idle was going up and down. I shut her off and then there was a little smoke coming out of exhaust.
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Post by lawless211 on Jan 17, 2016 18:49:05 GMT -6
JR So jut hook up the line from carb --> intake manifold without the tee to the petcock? I guess that seems like the only option if the petcock is plugged off, but seems strange.
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Post by lawless211 on Jan 17, 2016 13:43:01 GMT -6
JR Fixed filter, double checked valves, re-set mixture screw, but there definitely seems to be a problem with the petcock, even though I got a solid flow when I tested it, but today it doesn't do anything when I pull syrenge on the air line. If I do like in that last video and plug off the petcock, do I also just plug off the air lines coming from manifold and carb?
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Post by lawless211 on Jan 16, 2016 22:34:38 GMT -6
JR Starting sounded better with new battery, but still took awhile to start. Died once I released throttle. 2nd time I tried to start it, there was a clank sound right at first and then it continued what it was doing. I would describe the sound like a pencil being put into a small fan. While it was running, there were air bubbles moving up the gas hose. Is that normal or is that saying that the gas isn't being pulled through very well? Here is a video of the gas line while it's running. You'll see the back wheel stop spinning which is when I release the throttle and then you will hear it die.
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Post by lawless211 on Jan 16, 2016 13:38:21 GMT -6
JRThe battery was no good. I got a new one and I am charging it now. I will update after it is charged.
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Post by lawless211 on Jan 16, 2016 12:22:27 GMT -6
JR Petcock is working well. Taking battery to get checked out now or buying new one. Besides that, what next since petcock is working?
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Post by lawless211 on Jan 15, 2016 20:42:53 GMT -6
JR There is definitely a good spark. I think you could be right with something with petcock or somehow not getting fuel. My tank is up higher than the carb, but I believe it is a vacuum fuel petcock. Here are some images of it. I don't think there are any more gaps or air leaks, but what do you think? Here is the latest video on me trying to start it. I once again got it to start once or twice, but mainly getting this.
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Post by lawless211 on Jan 15, 2016 9:30:55 GMT -6
JR I recently charged it. I plugged it in to a trickle charger last night to check again and it was not long at before it said it was charged. I did some more work last night and tighted some areas around the carb to make sure there weren't air leaks and I got it started the best I have in awhile. I set the fuel ratio screw and then using the idle screw, but it would still die if I let throttle go even when i was turning idle screw. Shortly after this, I recorded this video of me trying to start it again with no luck.
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Post by lawless211 on Jan 14, 2016 21:36:43 GMT -6
JR Did you get a chance to listen? I went through pages 11-40 in this class and read any thread that seemed similar to mine and haven't really found anything solid. I would love some expert advice being a new student. Thanks,
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Post by lawless211 on Jan 13, 2016 20:50:06 GMT -6
Here is a clip of me trying to start it. Like I said, if I do this for a little while, I can get it running, but will die as soon as I let off of the throttle.
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Post by lawless211 on Jan 13, 2016 16:38:25 GMT -6
I have a tao tao cy150 and having an issue with it dying as soon as i release the throttle. I just upgraded the fuel/air hoses with helix hoses, put in a good spark plug, charged the battery, and even put a new carb in. After doing this, everything was acting the exact same as before, so im not sure whats going on. I am also getting a hesitation when I start her up and then it takes about two minutes of hitting start and turning throttle multiple times. I wish I could upload audio because the sound seems pretty odd and would think someone thats been around scooters would have a good idea of where to start. I adjusted the valves to .003 and .004.
The other post pointed to air/fuel ratio but the problem is right away and is acting the same with a brand new carb. I am pretty new to all of this and there seem to be some knowledgeable people here. I came across this site when reading a similar thread, but seemed different enough to write my own. Ive done more research and reading the past few weeks and have learned a lot and I am glad I made all of those changes, but I am now lost and am pretty desperate to get this running well again. The only local scooter repair shop is where I got the scooter and know I will be over charged. Please help.
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