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Post by razerfitness on Jul 20, 2013 15:20:50 GMT -5
Ok, so I was last chasing a few electrical problems and the scooter was running awesomely. (150cc, Roketa Aruba, 08). I ran across a new fuel filter at lowes that looked identical to the one I had on it (I have 2x of these scooters, one was missing the filter), I installed it on the 'running' scoot and then it started having issues. I have changed back to the old one but with no luck. It will 'start' most of the time, but will only idle for a few seconds and shut off. The only difference is if it's been sitting for awhile it will run for maybe 30 seconds. It seems like its not getting any gas, I don't see much going into the filter (Yes I've switched it around to see if that would change anything). I have great gas flow from the tank into the vaccuum fuel pump? Small grey thing, with in, out and vent, if I unplug the out going into the fuel filter, I just get a small trickle of gas, I tried this with the other scoots as well, same problem. I unhooked the vac line going into the T connector and put a vacuum on it (some kit I picked up years ago when playing with my old IROC lol, squeeze handled thing, small guage on it) and it held good vacuum, wasn't sure if applying vacuum would make the fuel flow or not. Thats where I am now, all the lines look good, each line holds good vacuum, the carb was thoroughly cleaned out when I got it, and new gas put in. Just boggled here, if anyone has some ideas, please let me know, I really enjoy riding this thing lol, thanks in advance.
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Post by Rebel on Jul 20, 2013 15:29:50 GMT -5
Vacuum makes it open up and let gas flow.
You probably need to look for a vacuum problem.
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Post by razerfitness on Jul 20, 2013 15:36:30 GMT -5
So I *should* get a nice, steady flow into the filter?
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Post by Rebel on Jul 20, 2013 21:15:58 GMT -5
Yes, there shuold be enough in the carb to start it and then the vacuum from the motor keeps it flowing.
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Post by razerfitness on Jul 22, 2013 12:25:06 GMT -5
Well, I'm just lost now lol, checked each vacuum line with my pump, each checked out fine, changed out the EPA canister with the other scoots, no change, even changed the entire air filter assembly, no change. Today I took off the EPA canister, plugged the lines, ran one line from the intake manifold to the carb, ran the other line on the other side of the intake to the petcock, no change there either. It will start pretty much every time, but only run a few seconds, I had it going for about a minute yesterday by laying on the throttle but then it started lagging. I'm pretty much out of ideas, I can feel some air by the intake (black tube on the end of the carb?) So would that be my next step, checking the gasket there? Other than that I'm at a complete loss lol, I figured it would be something simple b/c it was running great, then not running at all. Thanks again!
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Post by Rebel on Jul 22, 2013 13:40:27 GMT -5
Back to basics,
It needs fuel, spark, compression, timing.
Seems like it really is a fuel problem because it would not run at all if any of the other things were not working. Have you pulled the plug and checked it? if you have, is it wet? You could be flooding out. Seems like it is either starving or flooding.
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Post by razerfitness on Jul 22, 2013 13:56:39 GMT -5
From what I can tell, theres only drops of fuel going into the filter. Is there a way to eliminate the petcock? Just to see if that's the issue? Ty again
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Post by Rebel on Jul 22, 2013 14:45:15 GMT -5
Sure,you can take it off and find an adapter to fit the hose(you will need to spend some time at the hardware store looking for a fitting the hose can go on)to a manual petcock from a lawn mower to it. You can buy those for about five bucks at places that sell riding lawn mower parts.
We had a member post how he did the adaption but I do not know where the thread is right now, sorry.
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Post by razerfitness on Jul 23, 2013 10:15:41 GMT -5
Ill do some digging on that, thanks. For now I'm going to clean out the carb on the 2nd scoot n try to get it going lol.
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Post by razerfitness on Jul 23, 2013 10:44:32 GMT -5
Ok, so I straight lined from the tank to the filter, gas flow was good, still had the same issue. Could it be something inside the carb?
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Post by Rebel on Jul 25, 2013 0:29:01 GMT -5
Sure. The jets can be plugged. There can be something blocking a passage.
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Post by razerfitness on Jul 25, 2013 12:51:33 GMT -5
Well, the carb looked good, good airflow through all the passages. While I had the carb off, I went through each and every fuel and vacuum line and plugged one end, applied a vacuum to it and cut ends off where they weren't connecting well. I also put each hose back on with a zip tie instead of the failing clips that where on it. I DID have good fuel flow at first, now its back to barely running sometimes and mostly just not starting. I pulled the vac line at the petcock and put it against my finger, not 'real' sure the operation, but it just puffed puffed puffed, not a strong steady pull by any means. Would this be the right way to start trying to trace this problem? Thanks again, I'm about to pull my hair out on this one lol.
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Post by Rebel on Jul 25, 2013 17:33:16 GMT -5
I thought you had it rigged without the vacuum petcock. When it is running you should have a constant vacuum on a vacuum line until you open the throttle and then it will drop off. Do you have a vacuum guage?
Do you know the tank is clear of debre? People have reported chunks of plastic in the tank that can cur off fuel flow.
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Post by razerfitness on Jul 25, 2013 22:38:52 GMT -5
I have a hand held vacuum pump with a guage on top, If that won't work I can pick something up. I'll for sure check the tank and see if I can see anything there, I've bypassed the petcock a few times while troubleshooting it, I can't really blame the petcock at this point lol. I did check the manifold O-ring and it all looked fine. I even unbolted the exhaust to see if that made a difference. The only other thing is that I hear a sparky clicking when I try to start it sometimes, and when it does run, it idles very rough and the headlights go up and down in brightness with the idle. Could an electrical problem cause it to run this way? Just tossing that out there, thanks again!
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Post by Rebel on Jul 26, 2013 0:05:43 GMT -5
No need to go buy a vacuum gauge.
Could electronics be causing it? I don't know. CDI's are a weak link in these though and they are pretty cheap to buy. But since you have spark seems like a slim possibility.
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