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My scooter starts to fail and backfire at full speed or when its starting a hill even smoler one it starts failing and backfire i already change the spark plug and clean the carburetor but its the same thing

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  • Motorcycles Master
  • 10,875 Answers

Timing is bad

Posted on Mar 30, 2015

Testimonial: "How to i fix it?"

  • 2 more comments 
  •  johnny rebel
    johnny rebel Mar 31, 2015

    make model?

  • milton pontes
    milton pontes Mar 31, 2015

    its a Keeway f act 50 i put new cilinder head piston factory size and variador the bike run well 2 por 3 days than RAM outros of g?s and Stuart the problema i alreadi clean the carburador and still the same new spark plug and is the same thing it runs gread in straight way but whin need to make a Hill even smaller it starts to F?il and backfire

  • milton pontes
    milton pontes Mar 31, 2015

    ( RAM outro of gas and Stuart )run out of g?s and stard

  •  johnny rebel
    johnny rebel Mar 31, 2015

    what is the make and model and year??????????????????????

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Xingyue Xy150 (2008) shutdown in middle of no where. After few hours starts again and then after few kms stops and dont start with electric start or kick start or even push start. be precise please.


Hi, Aziz and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a "LOAD" test if necessary, your battery may show 12.5 volts but have little or zero amps and needs to be replaced.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, stator, magneto, points/condenser ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. Fuel tank contaminated with ethanol sludge.
15. The gas cap is not venting properly or fuel tank venting system blocked.
16. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
17. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the blue links below. Good luck and have a wonderful day.
Scooter keeps cutting off while driving SCOOTER PROFESSOR
https://groups.google.com/forum/#!topic/alt.scooter/jwRUQITS9lA
http://www.family-motorsports.net/GY6-50cc-150cc.pdf
150cc 125cc GY6 Scooter Parts 4 stroke Chinese and Asian scooter parts...
SCOOTDAWG GY6 Owner Manual

Apr 13, 2017 | Motorcycles

1 Answer

I have a 2007 keeway hurricane and wont start


Hi, Brandon the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or damaged battery, 9 volts or lower.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. Gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable free downloads that you need please visit the websites below. Good luck and have a nice day.
50cc keeway hurricane problems
Help Scooter won start cleaned carb which hoses
Scooter Troubleshooting Scooter won start All about Scooters
http://www.49ccscoot.com/manuals/Keeway_50cc_2T_Service_Manual.pdf

Feb 21, 2016 | Keeway Motorcycles

1 Answer

Piaggio fly 50 starts runs few seconds then cuts out will not take any gas. Then it has to set before it will start again


Hi, Kevin the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or damaged battery, 9 volts or lower.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. Gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable free downloads that you need please visit the websites below. Good luck and have a nice day.
Scooter Questions Get Answers to Your Scooter Starting Question Piaggio problem please help
https://scootergrisen.dk/scooterhjemmeside/download/piaggio_fly_4t_servicemanual.pdf

Feb 20, 2016 | Piaggio Motorcycles

1 Answer

Audi A4 1.8 2001 has no power, backfires


1.8 were known for failing coil packs that control 2 spark plugs and also mass air meter faults to both causing misfires

Apr 03, 2014 | 2001 Audi A6

1 Answer

2000 tundra v6 5-speed cold start truck runs great, park it for 20-30 min it will start fine but after going 1/4 mile it dies, looses power. pull over and it will backfire and sputter until it eventua


bad need of a tuneup? like new spark plugs, ?
172 , is 02 rich/ lean warning. this one is low oxy for rich.
this code can just be a victim. for sure , with misfire.
means 02 sensor stuck at rich,
what is water temp in engine coolant, at failure? less than 150F?
could be lots of things.
leaking injectors, bad fuel.
injector sticking> causing misfire.
id use a scan tool and watch all sensor when it fails.
too high fuel pressure.
misfires cold, but only luke warm cold starts not fully cold.

just one DTC, no P0300 or 30x misfire codes, not even P0300 pendings?

Jan 31, 2014 | 2000 Toyota Tundra

1 Answer

I started my yz 250 up and warmed it up. I took off and was practicing wheelies while waiting for my partner to get ready. I took off into the woods and it died on me down at the bottom of the hills....


Hi, Anonymous and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Accelerator pump damaged or not working.
11. Water or dirt in the fuel system, carburetor or filter.
12. Restricted, blocked or kinked fuel line.
13. Fuel tank empty.
14. The gas cap is not venting properly or fuel tank venting system blocked.
15. A failed fuel pump, pressure regulator and or fuel injectors.
16. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
17. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below. Good luck and have a nice day.
Bike won start just backfires occasionally
89 Yamaha YZ250 WR wont start Backfires periodically
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals
OEM parts for Yamaha
YAMAHA YZ250 LC Owner Service Manual

Jan 14, 2012 | Yamaha YZ 250 Motorcycles

1 Answer

I have a 2005 Diamo 150 scooter. It always starts when the engine is cool but it sometimes stops or fails to start when it is warmed up. What is the problem with my scooter?


Hi, Jerry the following applies to carbureted also fuel injected models and the usual suspects are:

1. Severely discharged or a damaged battery, 9 volts or lower.

2. Failed alternator/generator and or voltage regulator.

3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.

4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.

5. Failed system and or ignition relay, check for continuity.

6. Failed ignition coil, ignition/electronic module.

7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.

8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.

9. Air/fuel mixture screw improperly adjusted.

10. Water or dirt in the fuel system, carburetor or filter.

11. Restricted, blocked or kinked fuel line.

12. Fuel tank empty.

13. Gas cap is not venting properly or fuel tank venting system blocked.

14. A failed fuel pump, pressure regulator and or fuel injectors.

15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.

16. Needle and seat stuck closed in the float bowl.

For more information about your issue and valuable "FREE" downloads that you need please visit the websites below. Good luck and have a nice day.

http://www.apriliaforum.com/forums/showthread.php?174841-My-scoot-won-t-start-sometimes-when-engine-is-warm

scooter wont start when hot

http://www.carlsalter.com/diamo-service-manuals.asp

Scooter Parts for Chinese Scooters Atvs

Chinese ATV Owners Repair Manuals

May 24, 2011 | 2007 Diamo Tracer 150

1 Answer

Hi,i own a dinli t-rex dl-601 100cc atv quad bike and i recently changed the v-belt,cleaned the carb,wahed filters,drained and changed engine oil,drained and changed petrol,drained and changed 2 stroke,...


I think you might want to change catagories, I found this under Bicycles. Also, I was curious as to how you can list it as a Quad Bike . . . Bike is a short term for Bicycle, Bi meaning 2 as in 2 wheels.

Nov 21, 2010 | Quad 47 cc / 49 cc Pocket Mini Bike...

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