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2008 fatboy repairing front end hit,bike has intermittent spark,replaced broken voltage reg.,checked crank sensor ok.leftt side regulator wires may have had some stress on them but do not see anything visual.if i hit the sarter button quickly and then crank it will spark continuously.if i stop and try again it wont spark.

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How good is the magneto on it? just a guess but it does create the spark

Posted on Sep 19, 2008

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2008 triumph Daytona 675 has rough idle on startup for about 30 seconds


Hi, Marcel and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
6. 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.
7. Intermittent short circuit due to damaged wire insulation.
8. Intake air leak.
9. Water, dirt, or rust in the fuel system, fuel pump and/or filter.
10. Faulty fuel pressure regulator
11. Fuel tank vent system plugged.
12. Throttle body controls misadjusted.
13. Damaged throttle body or intake seals.
14. Loose, dirty, or corroded ignition module connector at crankcase.
15. Faulty MAP, CKP, O2, and/or CMP sensors.
16. Incorrect valve timing.
17. Weak or broken valve springs.
18. Damaged intake or exhaust valve.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
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Triumph DAYTONA 675 Service Manual

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1 Answer

I have a 2002 Harley Fatboy. The coil was broken at one of the tips. I replaced the coil, the 2 spark plug wires and plugs. Tried to start but did not. Checked for power at the plug coming into the coil. I...


Hi Anonymous, when checking for spark the CKP needs to measure the compression bump in order to send the correct signal to the ICM/ECM so always check for spark with either a third plug grounded or lift the end of the plug boot 1/2 " off one of spark plugs that are in the head. and the usual suspects are:
1. Fuel tank empty
2. Fuel supply valve turned off.
3. Fouled spark plugs.
4. Engine flooded with gasoline as a result of over use of enrichner.
5. Fuel valve or filter clogged.
6. Vacuum hose to automatic fuel supply valve disconnected, leaking, or pinched.
7. Discharged battery, loose or broken battery connections.
8. Loose wire connection at coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, spark plug cable connections loose,
or cables connected to wrong cylinders.
10. Ignition timing incorrect due to faulty ignition coil, ignition module, or sensors " Manifold Absolute Pressure" "Camshaft Position Sensor" "Crank Position Sensor" "Brake Apply Sensor
11. Engine lubricant to heavy ( winter operation )
12. Sticking or damaged valves or push rod wrong length.
13. Primary cam sproket spline sheared or missing spacer.
14. Security alarm system not disarming.
For a primary suspect please visit the website below: Good luck
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F1 bike will not start


There could be many issues causing no spark on a 04 GSXR750. Check for battery voltage on the orange/ white wire at each coil. If none this model has a history of a failed right hand handlebar switch and or connector. Ignition voltage passes through this switch. Also check the main harness connector under the left side fairing panel near the area of the turnsignal for internally broken or corroded wires. If all this is good check the signal generator(crank position sensor) output voltage with a "peak reading " voltmeter. This is a special type of meter or attachment that must be used. The voltage should be 3-7 volts DC at cranking speed. Good luck.

Jan 14, 2013 | 2004 Suzuki GSX-R 750

1 Answer

2008 harley street glide intermittent spark starts but wont start


Hi Anonymous, and the usual suspects are:
1. Plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discarged.
6. Damaged wire or loose connections at battery terminals especially the ground cable at BOTH ends, ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. If your bike has a CKP sensor you must leave both plugs in
head and check for spark with a 3rd plug. Good luck.

Sep 04, 2012 | 2008 Harley Davidson FLHX Street Glide

1 Answer

2008 Harley Ultra CVO. When it gets hot the back cylinder spark plug starts missing. Also the power drops considerably. Any solutions?


Hi Anonymous, and the usual suspects are:
1. Plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition or leaking.
3. Spark plug gap to close or to wide.
4. Faulty ignition coil, module and or sensor.
5. Battery nearly discarged.
6. Damaged wire or loose connections at battery terminals especially the ground cable at "BOTH" ends, ignition coil, or plug between ignition sensor and module.
7. Intermittent short circuit due to damaged wire insulation.
8. If your bike has a CKP sensor you must leave both plugs in
head and check for spark with a 3rd plug. Good luck and have nice day.

Aug 01, 2012 | 2008 Harley Davidson FLHTCU Ultra Classic...

1 Answer

My 1996 Ciera Oldsmobile through a PO336 code?


Hi there:

DTC P0336 - Crankshaft Position Sensor A Circuit Range/Performance


The crankshaft position sensor (CKP) is usually a two wire sensor: a signal and a ground. The CKP sensor consists of (usually) a permanent magnent sensor that is mounted in front of a reluctor (toothed) wheel mounted to the crankshaft. As the reluctor wheel passes in front of the crank sensor, an A/C signal is produced that varies according to engine speed. The PCM (powertrain control module) uses this A/C signal to interpret engine RPM. Some crank sensors are hall-effect sensors instead of permanent magnent sensors. These are three wire sensors, provided with voltage, ground, and signal. They too have a reluctor wheel with vanes and "windows" that change the voltage signal to the PCM, providing a RPM signal. I will focus on the former, since they are simpler design and more common.



The crankshaft reluctor has a specific number of teeth and the PCM can determine the position of the crankshaft using only this sensor's signature pattern. The PCM uses this sensor to also determine cylinder misfires by measuring the reluctor teeth locations in the CKP sensor signal. In conjunction with the Camshaft position sensor (CMP) the PCM can determine timing of spark and fuel injection. If the PCM senses a loss of CKP sensor signal (RPM signal) even momentarily, P0336 may set.


Symptoms of a P0336 DTC may include:
Intermittent stalling & no start
No start
MIL (Malfunction Indicator Lamp) illumination
Intermittent misfire


Potential causes of a P0336 code include:
Bad crank sensor
Broken reluctor ring (missing teeth, debris lodged in ring)
Reluctor ring dislodged/stripped from it's stationary location
Wiring harness chafing causing short
Wiring open in CKP circuit


Possible Solutions: Crankshaft sensor problems are at times intermittent and the vehicle may start and run for some time until problem occurs. Try to reproduce the complaint. When engine stalls or if the engine will not start and continue to run, then crank engine while observing RPM reading. If there is no RPM reading, check for a signal coming out of the crank sensor. Using a scope is best, but since most DIYers don't have access to one you may be able to use a code reader or the tachometer to check for RPM signal.


Visually check the CKP harness for damage or cracking in the wiring insulation. Repair as necessary. Make sure the wiring isn't mis-routed near high voltage spark plug wires. Check for loose connection or broken lock at the sensor connector. Repair as necessary. Obtain a resistance spec for the Crank sensor. Remove and check it. If it doesn't pass, replace it. If it checks out okay, check the reluctor ring for damage, broken teeth, or debris lodged in the ring. Make sure the reluctor ring isn't dislodged. It should be stationary on the crankshaft. Carefully repair/replace as necessary. Note: some reluctor rings are located in the bell housing of the transmission or behind the front engine cover and cannot be easily accessed.


If the vehicle intermittently stalls and after stalling you have no RPM signal and you have verified the wiring to the CKP sensor is good, then try replacing the sensor. If that doesn't take care of it, and you can't access the reluctor ring, seek help from an automotive professional.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jun 27, 2012 | 1996 Oldsmobile Cutlass Ciera

1 Answer

Replaced two new batterys after batters discharge bike dyes i believe alternator is defective. is this a repair i should attemp in my garage as a certified small engine mech.? would i save that much doing...


well if you a cert small engine tech you shouldnt be asking this...

Start the bike up and check to see if its charging 13.4 over if it is, its charging. Now check for a current discharging the battery using a amp/ multimeter.
If its not charging, check for battery voltage at the regulator, red and black it sould be the same as whats at the battery if not check for bad wiring and the earth lead. If the bat voltage is OK unplug the reg run up the engine and check for voltage with meter on AC at the 3 same coulor wires yellow or white this comes from the Alt cover you should have 18 -40volts AC at 2500RPM if this is correct on all 3 wires (test any 2 of the 3 wires) if this OK suspect the regulator

Jul 01, 2010 | 2004 Honda VT 1100 C2 Shadow Sabre

2 Answers

Hyundai Excel 97 will not start, cranks well.


I finally traced my similar problem to a broken wire into the plug going to the crank angle sensor which on this animal is located at the front of the motor on the right hand side when looking at the motor from the front. It is just below the clutch slave cylinder and is held in place by a 10mm headed bolt or phillips head (posi drive) bolt.
Good place to start.
franknpeg

Apr 18, 2009 | Hyundai Excel Cars & Trucks

1 Answer

1995 fat boy- harley davidson


This is going to be a problem that will need to be tracked down because there are several things that could cause this. It's going to be in the electrical system, and any one or combination of the following can cause this, Faulty switch, especially the ignition switch, bad wiring which could be a bad connection, loose ground, bare wire, or broken wire, These are the two cheapest, but the hardest to find. Now, it can also be a bad or malfunctioning ignition module, coil, voltage regulator, and magneto assembly. You will have to test each of these. I recommend that you start at the spark plug end and work your way back since most of this is in line and work in conjunction with each other. Keep in mind that this being an intermittent problem, it may be extremely hard to find.
I also have a 95 Softail, and recently had a similar intermittent problem, turned out that there was a hairline crack in the regulator, and the problem would only occur if the regulator was warm enough for the crack to open a bit. I also traced the wiring harness, found and replaced several wires that were in bad shape, thinned, stretched, corroded, etc... You will be amazed at how much wear the wiring harness will have on a 13 year old bike.
Don't let this discourage you. In my opinion, the mid to late 90's models are the best HD ever built, and the Evo is by far the best engine. With the newer bike you have to worry about things like, crank and cam sensors, ECM's, fuel injection, and all the other electronic BS. It's to the point that the average rider can't work on his/her own bike, which is getting away from the HD tradition. That's a great bike you have, keep it for a long time. I may buy a newer bike someday, I don't know, but I do know that I will always keep my 95. Good luck with this and be safe.

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Sep 15, 2008 | Harley Davidson Harley-Davidson Motorcycle...

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