Question about 2005 Honda CRF 100 F

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Crf100 has a weak spark

Changes spark plug but spark still weak

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You may have dirt/water in-/ behind the stator plate, remove right side (as you sit on it) plate and check for any kind of debris. Clean and find point of entry - repair and seal.

Posted on Dec 30, 2008

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1 Answer

Weak spark


This is just a shot in the dark but have you checked your ground wire from the battery to the engine/frame.A bad ground wire could be rotten on the inside and you would never know it.This would give you a bad path for current completion and therefore a weak spark.Just a thought Good luck

Apr 29, 2014 | 1993 Toyota Tercel

2 Answers

2008 Cadillac CTS returning P0303 after replacing spark plug and coil pack


Error Code: P0303
Description:
Cylinder 3 - Misfire Detected
Possible Cause:
Wiring harness, igniter and fuel injector connectors.
Ignition system. (Spark plugs gaps)
Fuel injector No. 3.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression, cylinder No.3. (check valve clearance and throttle plate for excessive wear)
Engine control module (ECM).

Feb 27, 2014 | 2008 Cadillac Cts

1 Answer

Weak spark,willnot start,changed plug


A weak spark can be attributed to a number of issue:
1. Wire from the magnetto to the spark plug is saturated with oil (clean well with degreaser)
2. Spark plug cap deteriorated. (most are not easily replaceable)
3. Spark plug fouled (insure you are using new)
4. Significant build up of rust on the flywheel (lightly sand rust off)
5. Bad Magnetto or CDI (especially if it has gotten wet or is cracked.) Note: (Cost typically prohibitive for replacement).
6. Spark plug gap significantly out of specs. (Regap to specs, retry)

If you are certain you have a weak spark, these are typical causes. Often, more likely problem is carburation, fuel filter and/or fuel lines - which are much easier and less expensive fixes! Hope for the fuel lines being cracked...Good luck :)

Sep 25, 2010 | Garden

1 Answer

Firing on one cyl. weak spark


does each plug have its own seperate coil? if so, i would say the coil for the weak cylinder is faulty

May 23, 2010 | 2001 Yamaha V Star 1100 Classic

1 Answer

Won't run. has spark (weak)fuel to fuel rail.


id be leaning twords a coil pack on this one, if the spark is weak change the plugs and wires first since its cheaper, then if that doesnt cure it change the coil pack.

Mar 19, 2010 | 1995 Volkswagen Jetta

1 Answer

2006 crf100 no spark


You have 2 basic possibilities,
  • A kill switch is active
  • The ignition control module has gone bad
The stock spark plug is an NGK CR7HSA. Is a kill switch on? Does the side stand have a kill switch? Is it working properly? Check the operation of 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? If still no spark, get CDI system checked at the dealers shop.

A top rating on this answer? Thanks!

May 24, 2009 | 2005 Honda CRF 100 F

2 Answers

My honda crf100 will not start i have change the spark plug and air filter the only way it will run is if I spray starter fluid into the carb and keep sraying it into the carb otherwise is just shuts down


it the bike has been sitting for a long period of time. the carb. can gum up. pull the carb. off. clean it up really good. insuring you get all the small ports clean. then try it again.
every dirt bike i've had requires a oil wetted air filter. dont forget about that.

Feb 23, 2009 | 2005 Honda CRF 100 F

1 Answer

Crf100 has a weak spark


its the coil or magneto one of these two will cuase a weak spark they are simple to replace though

Dec 30, 2008 | Honda CRF 100 F Motorcycles

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