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4 wheeler won't start

Won't start checked coil,switch,spark plug,fuses and wires to be sure of connection and these are not problem,check gas and it turns over but seems to not get fire this is on a 90 cc 4 wheeler SunL type

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  • JETHRO40 Oct 04, 2008

    I have the same problem, turns over but will not start, changed the plug, checked the gas, changed the coil chech the stator, have not checked the brain box yet.

  • Anonymous Oct 25, 2008

    all i know is that it has a fresh plug,freshly rebiult carb,plenty of gas just got motor rebuilt and it won't start it won't do nothing but turn over and try to crank but won't can anyone help me PLEASE

  • alec sawyer Jan 07, 2009

    ive checked evrthing but my fourwheeler rolls over but does not start

  • Anonymous Jan 13, 2009

    hopefully it isnt one of the recalled ones...Unless you kept receipt..



  • Anonymous Mar 10, 2009

    i have a 50cc 4wheeler turns over will not start have changed plug and still nothing

  • Anonymous May 10, 2009

    my honda 90cc 4 wheeler wont start what should i do

  • richard salmonson Feb 03, 2013

    carburator needs replaced I have had same issue twice cleaning carburator did not work these carburators have issues with ethanol gas

  • Frederick Leonetti
    Frederick Leonetti Jun 02, 2013

    Same prob. Here 110cc utility quad (SunL) Turns & turns but no fire

  • Gina Tryon
    Gina Tryon Jan 26, 2014

    how do you test the cdi box

  • Anonymous Mar 20, 2014

    i bought a new plug a new battery cleaned the carb everything and still wont fire

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The Sunl's are notorious for the stator going out. Check with your dealer for specs on testing the stator. It could also be the CDI unit too! I hope this helps

Posted on Aug 28, 2008

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I need a wiering diagram for the sunls electrical system someone has cut the wires on it and it also has a remote for the alarm. Can someone please help me by sending me the electrical diagram at lkwperry@msn.com

Posted on Oct 06, 2011

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Posted on Jan 02, 2017

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1 Answer

My motorcycle will not crank it's got gas an spark


Hi, Chad and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
11. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and CDI box.
Spark plug cables in bad condition and shorting check for leakage in the dark, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty MAP, CKP, O2, TPS, sensors.
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box.
17. A stuck bent or burnt valve.
18. Tip over sensor needs a reset.
19. Check for engine trouble codes.
For more information about your issue please click on the links below. Good luck and have a nice day.
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1 Answer

1985 Yamaha three Wheeler 50 cc has no spark been setting awhile


Hi, Terryjoe if you have a CKP sensor it needs compression to send the correct signal to the ICM/ECM, make sure both spark plugs are in heads and use a grounded third plug to check for spark or hold spark plug cable close to spark plug in the head. If still not getting spark the usual suspects are:
1. Fouled spark plugs.
2. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, or BAS sensor.
7. Faulty ignition switch.
8. Security alarm failing to disarm needs reset
For more information about your issue, please visit the websites below. Good luck and have a nice day.
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1 Answer

Cant get fire on plug for a 200 bear tracker 4 wheeler


When checking for spark at the plug make sure the outer metal part of the sparkplug is grounded to the engine, make sure the main ignition switch is on, make sure the emergency switch on the handle bar is set to the start position and make sure the atv is in neutral.
After checking all these things above and it still fails to fire or spark at the plug then check all or any wiring, wiring connections and or connectors that you have intentionally or unintentionally disconnected while woking on the atv and also check all the fuses.
If all these check out as good and the atv still won't fire at the plug you will need to test other things such as the igntion coil, pickup coil but you will need a volt/ohm meter and the specifications for these in order to test them.
In order to get this information go to the Yamaha ATV Forum and you will see a sticky note posted by oxidized_black in regard to Yamaha Service Manuals go through each page until you get to a download LINK for a 1999-2001 Yamaha Bear Tracker YFM 250XL(C) Service manual link. Click on that LINK and download the PDF file to your computer this should provide you with more than enough information to test and find your ATV problem.
Hope This Helps

Sep 16, 2013 | Cars & Trucks

1 Answer

1998 Ford Explorer, 4.0 SOHC No Spark. Engine will crank but it won't start. Replaced the Crankshaft Sensor, Coil Pack, & Spark Plugs. Still no spark. What next?


You are at thhe right trail what controls spark is coil pack crank sensor sparkplugs and plug wire but the most important is power . I mean 12 volt connections and ground This includes checking fuses you need a simple volt meter doesnt have to expensive or fancy just to pick up 12 volts let start with fuses in the engine juction box (there not mark to what it belongs to) make sure none are open. especially fuse 19 and 24 , next go to the crank sensor make sure the tabs are snuggly on now to the coil pack there is a red and light green wire this comes from ignition and feeds 12 volts at the coil pack measure that voltage is it 12 volts if not correct it this is from ignition switch ( you can make a tool that feed 12 volt with a wire and a fuse in series and attatch it to battery and the primary wire this is known as hot wire) next go to the ECM wiggle the wires see if that get a connection going if not go back to the ICM here are the wire you are to measure the tan light green, this is from ECM and it is pulsed it measure 5vlts to 0 volts switched then measure the tan orange the same thing 5 volts to zero,then tan white again 5vlts to zero. any one of these 5 to zero fails you fix is the ecm

Aug 21, 2011 | 1998 Ford Explorer

1 Answer

Motor turns but will not start


You need fuel, air, and fire to start the car. Make sure you check the fuel components. Make sure they work. Fuel pump, filter, lines, injectors, pump fuse/relay. Fuel goes from the pump to the filter, from the filter through the gas lines and then to the engine. Make sure gas is getting through. If the gas checks out, make sure you are getting spark. It could be spark plugs/coils, wires, coil pack, distributor, dist.cap, rotor, cam sensor, crank sensor, ecm. You need to do a spark test. Check your timing belt/chain. Anyone of these can cause your car not to start. I know it is a lot. That is why it is important to check for gas and spark. Make sure you check all your wires, connections, and hoses. Make sure there is no intake leaks. If you have any questions, please let me know.

Mar 06, 2011 | 1994 Buick Century

1 Answer

Fully charged battery on my 1996 cb500,choke out however wont fire up just does a little puff like sound


NO - SPARK
Check for spark at spark plug.
1. If no spark, test the wire to the coil with test light and see if you have power to coil.
2.If no power to coil, make sure your on/off button is on and working.Use test light.
A. Power at the switch but not at the coil indicates a broke wire from switch to coil.
B. NO power at the switch indicates ingintion switch is off or faulty and not sending power to your switch , make sure key is on. Use trest light.
3. If you have power to the coil but no spark from the coil - replace the coil

SPARK
Check for spark at the plug
1.If you have spark at the plug, but not starting - check that your carbs are getting gas.
2.Petcock Could be off, Fuel Filter could be clogged, Carbs could be dirty or clogged and your not getting any gas.
3.Pull spark plug - If no gas present then your not getting gas, if wet then you getting gas and your flooded. Make sure you have good gasoline, Bad gas won't burn.
or your bike is worn out and dont have any compression.

With Good gas, and Good Spark, and Good compresssion, the bike will run.

If your not getting gas to your motor through the carbs, pull carb off and thouroughly clean it.

Dec 03, 2010 | 1997 Honda CB 500 S

1 Answer

Motor won't start.


che ck if their is a spark after the coil before the spark plug, if no, replace it.

Mar 10, 2010 | 1988 Honda VT 1100 C Shadow

2 Answers

My kids 110cc 4-wheeler won't start. I put a new


did you check the coil for the spark plug, its obviously wiring somewhere, i say replace it all, its cheap to do that, and saves time fighting it

Feb 11, 2010 | RTO 110cc Basic Manual ATV # ATD-125C

2 Answers

No spark


Could be many issues: cam sensor, crank sensor, ECU. wiring ect...
I'dI start by checking/replacing the crank or cam sensor if ok I'd proceed from there. What car, year and engine?

Thanks,
Tom

Aug 22, 2009 | 1997 Chrysler Concorde

2 Answers

I have a YFM 200 (four wheeler) and am getting no spark. Have changed the plug, it turns over well, where do I go now? I have a 1986 version. Sorry, can't find this under "choose product category", but...


Check the fuses. Next, check for spark but with a new spark plug. How good is the battery? "Some juice" does not always translate into having enough juice for a spark. Fill the battery cells with water covering the battery plates. Jump start from your car battery. Is the kill switch on? Does the side stand have a kill switch? Is it working properly? Tip-over kill switch on your bike? Check the operation of the ignition switch and all kill switches with a volt ohmmeter.

Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center casing. If still no spark, get CDI system and coils checked at the dealers shop.

Please rate this answer. Thanks sharbow!

Apr 20, 2009 | 2001 Yamaha TW 200

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