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Post by riley126 on Jul 16, 2011 22:10:59 GMT -5
www.youtube.com/watch?v=jhBCV95cHB0Sorry I'm having trouble posting a video in the message box. Its a 2011 Tao Tao 50 with 600 miles on it. Bought it two days ago, ran fine during test drive and for 20+ minutes after bringing it home. Suddenly died at a stop sign, took a few minutes of trying to get it started again and it fired up only stayed running if i kept on the throttle. Shut it off after riding and it will only do this now. I have drained the gas tank and put fresh high test in, checked filter and pump. Fuel is getting to the carb, Nice blue spark from the plug, compression blew my thumb off plug hole, vacuum lines are working properly, Any suggestions?
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Post by mainepeace on Jul 17, 2011 0:15:48 GMT -5
Did you pull the spark plug? Is it the stock plug that came with it or did you replace it? Is the boot attached firmly to the spark plug? You should replace the spark plug anyway. Get an NGK C7HSA or C7HIX (iridium). The stock plugs are crap.
You can test the spark by removing the spark plug, plugging it into the boot, grounding the electrode on the frame or the engine. DO NOT TOUCH IT WITH YOUR BARE HAND unless you want to get shocked. If you crank the engine, you should get a bright blue spark. If you do not, it's something in the ignition circuit. If you do, you can move on.
You could also check the CDI connections. If you have a spare CDI you could swap it. If not, you could check the electrical connections. There might be a short in the kill switch or an improper ground.
Assuming gas is properly getting TO the carburetor, perhaps gas isn't getting into the cylinder... meaning the carb is clogged. Did you clean it out? And not just clean the jets, but make sure all the passageways are clear?
After spark and fuel, the only thing left is air, so you would need to test the compression. Going with averages, it's more likely that it's a clogged carb or a simple fix in the ignition circuit, but that's only a guess based on the healthy sounding cranking of your engine.
Greg
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Post by riley126 on Jul 17, 2011 0:23:33 GMT -5
Carb has been cleaned and a compression test was done. Both indicate healthy performance. I'm leaning towards a minor electrical disconnect or something of the sort. Now to find it!
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Post by ajmatt on Jul 17, 2011 0:52:00 GMT -5
Tytytytytytytyty riley. this is exactly what our's is doing and has only 200 miles; we bought it brand new 8 days ago.. AND it sounds just like your's. hope we get an answer !
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Post by ctss on Jul 17, 2011 3:29:20 GMT -5
Pull the vent tube off at the valve cover, plug it so the engine won't pull vacuum through it, and see if it will crank then. If it cranks, see how much smoke is coming out of the valve cover vent. I have seen almost new scooters with so much blow-by they would choke the engine out with the breather tube hooked up.
Do try another CDI also. Had 2 brand new bad ones last night while assembling scooters.
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Post by ajmatt on Jul 17, 2011 21:49:58 GMT -5
Was this ever fixed ? this is how our new Tao sounds too. Just curious since we are still grabbing at anything.
Thanks
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Post by riley126 on Jul 18, 2011 6:44:30 GMT -5
Havent had time to work on, hopefully tomorrow. I will post if i find a solution, i hope others will as well.
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Post by kellyetheredge on Jul 18, 2011 8:30:17 GMT -5
my tao acted like that after a few hundred km's......thought card or ignition....turned out to be valve adjustment...runs like a dream now
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Post by ajmatt on Jul 18, 2011 11:26:43 GMT -5
Okay, Kellyetheredge, I think you might have an answer for me too. Since you have posted on a few sites as me. Let me ask, what valve? that path I saw on others read that says 005 and 004 ?
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Post by godfella691981 on Jul 18, 2011 13:16:53 GMT -5
ajmatt. I also purchased a scooter in warsaw at drive time. I live in wabash. My TaoTao has issues too. I think that guy is selling junk. I've got about 1500 miles on mine now and I had problems with it starting hard and the next day I went to ride it and it wont run full throttle, mine has an electrical issue too.
I have done everything to mine except replace the stator and the ignition coil.
I'm waiting on the coil to be shipped to me now.
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Post by riley126 on Jul 19, 2011 0:16:09 GMT -5
I have tested everything mentioned with no luck, i am going to attempt to check valves in the morning. as always, i will post if i find out.
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Post by riley126 on Jul 29, 2011 0:50:26 GMT -5
OK, so the valves are where they are supposed to be. Tried spraying starting fluid directly in after taking the plenum off and it doesn't seem to be getting the plug wet at all. Tried a bit of gas directly down the shoot also. I'm lost.
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Post by mechaniczman on Jul 29, 2011 1:16:01 GMT -5
In the video you were trying to start it with the intake off. Theres been times when my scooter wouldnt start or would run like crap with it off. I would check your electric choke to make sure it is working properly. Try the kickstart too.
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Post by riley126 on Aug 13, 2011 1:44:31 GMT -5
i have tried it with it on and off, how do i tell if the choke it working? also should the throttle stop move when twisting the throttle?
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Post by mainepeace on Aug 14, 2011 16:17:11 GMT -5
Pull off the autochoke and turn the ignition on. It should extend within 2-3 minutes. It should also be "springy". Did you test spark? Pull the spark plug and ground it on the engine (hold by the boot) and hit the starter. You should see a bright blue spark. When turning over, put your hand over the intake venturi on the carb. You should feel a misting of gas on it. Put your finger over the open spark plug hole and hit the starter again. It should be blown off from the pressure (then sucked back on). If not, your compression is way too low. If it's blown off, your compress may still be low, so it's better to use a compression gauge.
Greg
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Post by edfr on Aug 14, 2011 16:46:17 GMT -5
Turning on the ignition will NOT activate the the CHOKE(ENRICHER), it only gets voltage with the engine running.
The Choke by DEFAULT is ON when Cold, meaning the Plunger is RETRACTED to allow extra fuel for cold starts. As soon as the Scoot Starts it is sending Voltage to the ENRICHER and as it heats up the PLUNGER starts to EXTEND OUT to SHUT off the Extra Fuel. It will Shut off the extra fuel within 3-4 minutes and after that the PILOT JET is the only thing that gas is being sucked out of to keep it running and idleing.
So can take the Enricher(choke) off and see if the Plunger is Retracted if so that is the DEFAULT position when COLD and is allowing extra fuel for starting.
Now when you take it off and you see the PLUNGER is EXTENDED then it is bad right from the get go and extra fuel to start is NOT being sucked in.
Lefty
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Post by riley126 on Sept 5, 2011 19:37:38 GMT -5
I have tried everything listed with no results. Any other ideas?
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Post by trailheadmike on Sept 5, 2011 19:50:17 GMT -5
worth checking for good connections to the wires going into the cdi.
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Post by edfr on Sept 5, 2011 20:09:05 GMT -5
After you crank it like in the Video take the PLUG out and see if it is WET. Let me know If it is wet or dry.
Then I will tell you what to do next.
Lefty
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Post by cyberbeer65 on Sept 6, 2011 4:45:11 GMT -5
Adjust those valves!!!
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Post by riley126 on Sept 26, 2011 1:26:01 GMT -5
With the piston lined up, the valves are dead on., plug is dry but i can smell gas out of the exhaust. Also could smell ether when i tried a few squirts of that.
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Post by tvnacman on Sept 26, 2011 5:36:23 GMT -5
riley , do you have a kill switch ?
go get a new spark plug and check for spark .
If you listen to edfr and myself we will get you going !!!!
John
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Post by Pony66 on Sept 26, 2011 9:34:17 GMT -5
I think I see you turning the throttle while cranking the starter, dont do that.
Put the air box back on. Make sure the kill switch is on.
Check for spark with plug grounded to ENGINE, not the frame.
Is the plug wet after all this cranking?
Pull your fuel line off the carb and stick into a jar. Now pull the vacume line off the intake manifold and suck gently. You should see a small stream of fuel flow, not a couple drips.
I would change your fuel line to clear yellow Tygon, then you can simply look and see if you have fuel to the carb.
Once, the float bowl drain, black tube with springy metal sheith, came loose. It would slowly drip and drain my carb of fuel.
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Post by riley126 on Sept 26, 2011 13:23:08 GMT -5
brand new plug with bright blue spark. kill switch is operational and i have tried the fuel line trick.
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Post by riley126 on Oct 9, 2011 4:52:04 GMT -5
where can i get a compression tester to fit this? cone style?
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Post by waterjunk on Oct 9, 2011 8:20:55 GMT -5
You have a possibility of a few things you could be overlooking.
First of all, having an extra carb to swap over for testing purposes would make this much more simple. I've seen quite a few new TaoTao carbs have random casting problems. Please describe your method of 'CLEANING THE CARB' as i've found nothing short of a thorough blasting with 90psi and a good soak.
Secondly you need to get a clear fuel filter or possibly some clear TYGON line. Remove your FUEL PETCOCK vacuum line and install the clear fuel filter or tygon line and reinstall back to your intake manifold.
Now when you turn the motor over check for fuel coming through your vacuum tube. This will cause rediculous ratios that will combust.
One last thing i can think of rreally quick is have you had an opportunity to change our the factory oil in your scooter? If not get some 10-40w in there asap. It's possible you had a soft seize on your ride home and fried a ring.
AND FOR ALL FUTURE ATTEMPTS AT STARTING PUT THE AIRBOX BACK ON! These taotao's run lean enough, they don't need help.
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Post by tvnacman on Oct 9, 2011 8:53:14 GMT -5
as a second look it looks like its a weak battery . cgarge that battery fully .
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Post by 50dude on Oct 9, 2011 11:19:39 GMT -5
Side stand switch.
This was faulty on mine, and it started when i cut the wires.
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Post by waterjunk on Oct 9, 2011 14:49:16 GMT -5
You have a possibility of a few things you could be overlooking. First of all, having an extra carb to swap over for testing purposes would make this much more simple. I've seen quite a few new TaoTao carbs have random casting problems. Please describe your method of 'CLEANING THE CARB' as i've found nothing short of a thorough blasting with 90psi and a good soak. Secondly you need to get a clear fuel filter or possibly some clear TYGON line. Remove your FUEL PETCOCK vacuum line and install the clear fuel filter or tygon line and reinstall back to your intake manifold. Now when you turn the motor over check for fuel coming through your vacuum tube. This will cause rediculous ratios that will combust. One last thing i can think of rreally quick is have you had an opportunity to change our the factory oil in your scooter? If not get some 10-40w in there asap. It's possible you had a soft seize on your ride home and fried a ring. AND FOR ALL FUTURE ATTEMPTS AT STARTING PUT THE AIRBOX BACK ON! These taotao's run lean enough, they don't need help. Hmm in re reading this post it sounds like the ramblings of a crazy person. Hopefully you won't judge  and good luck |
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Post by freedomscoot on Oct 9, 2011 21:18:31 GMT -5
Side stand switch. This was faulty on mine, and it started when i cut the wires. Just curious: What kind of scooter do you have? My Tao Tao doesn't have a kick-stand interlock.....I normally hate safety interlock...but I'm almost wishing mine had one, 'cause I keep forgetting to put the stand up when I take off...and one day it's gonna get me! |
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and good luck