Question about 2003 Hyosung Comet 250

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Front clyinder not firing ignition coil is good & spark plug &cap

Are good without sparkplug cap it sparks if you install the cap it does not spark

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Swap the caps around from the rear it the fault changes replace the cap, you can also test the cap with a multi meter it should read around 5k ohms or some of them may be 10K look on the cap..

Posted on Jan 31, 2009

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Why my 94 Astro van will not fire


this generation of gm vehicles is easy to troubleshoot. the engine needs 3 things to run: compression, fuel, and spark. since you mention fire, i assume you have no spark.

disconnect any random spark plug wire and connect the end to a hei spark tester. crank engine and observe for spark. if you have no spark, disconnect the center terminal of the distributor cap and use the hei tester in the same manner. spark means cap and rotor bad or bad plug wireset. no spark means make more checks.

check for battery voltage and good ground on distributor. check for open or shorted ignition module or ignition coil windings. if power and ground is present and ignition coil tests ok, check for ignition pulses at coil primary. if you have no ignition pulses feeding the coil, change the distributor.

with that generation of vehicle, the ignition system will operate without help from the computer. don't even troubleshoot the guts of the distributor, if you change the cap, rotor, and anything else, it will be the same price as a remanufactured distributor, and might not fix the problem. if you troubleshoot a low volrage related issue (no pulses, shorted or open circuit, unstable timing, etc), change the whole thing.

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2003 artic cat 400 no engine spark put new ignition coil on but still no spark what next?


It may be too simple but I have to ask, are you using a known good sparkplug, high tension lead and plug cap? Next is either the source coil isn't providing power to the "Black Box" or the pickup coil isn't sending a signal to the box to fire the sparkplug or finally the box itself is defective. To test further you will need a Shop Manual or Clymers manual and a VOM (Volt-Ohm Meter).

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the sparkplugs ,sparkplug wire set ignition coil, fuel filter, air filter, and if its a distribuitor type you can change the cap and the rotor

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1 Answer

HOW TO SET AN ROTER FOR AN 92 CADILIAC DEVILLE


standing passenger side vechicle with crankshaft pulley facing your.number one sparkplug location should be at twelve Oclock position.you need to know cylinders locations front cylinders left to right is 1 3 5 7 and back cylinders left to right is 2 4 6 8 and firing order is 1 8 4 3 6 5 7 2 your ignition timing need to be 10 degrees BTDC AT 800 RPM. YOU SET TIMING YOU NEED TO DISABLE SPARK ADVANCE BY CONNECTING JUMP WIRE OR PAPER CLIP STRECTCH AND BEND YOU NEED TO CONNECT JUMPER WIRE TO A AND B DLC TERMINALS. if ignition timing way off you wont get no spark.but check ignition fuse and make sure distributor cap and rotor good shape also spark plugs and wires.if all is good your ignition module or ignition coil bad.the 4.9 can be time if you have 4.6 engine cant adjust ignition timing PCM control timing.code scan vechicle first before buying new parts.look for ignition module or pcm fault codes.look for faulty crankshaft sensor or camshaft sensor.many things will cause no spark conditions.

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1 Answer

No fire to sparkplugs


Bit late here, but I love Datsuns! First check if you are getting power to coil on the + side of coil. Pretty much a straight path from ignition switch to coil. Then pull off coil to distributor cable at the distributor and check for spark on that wire when cranking engine over. If good, rotor, distributor cap, plug wires, or sparkplugs need checked. If no spark from coil, it should be tested with an ohmmeter for proper resistance values, or swap in another coil.
Does it have mechanical points and condenser or electronic ignition?

Nov 22, 2012 | Datsun 510 Cars & Trucks

1 Answer

2002 v star 650 no spark rear clyinder only


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. 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.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
6. Faulty ignition coil or ignition / electronic module
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
2005 650 with no spark at rear cylinder Yamaha Star Forum
Will not fire on rear cylinder Yamaha Star Forum
http://www.sloneservices.com/SilverBack/Other-Stuff/V-StarShopManual99-07.pdf
OEM parts for Yamaha
http://www.starmotorcycles.com/assets/service/manuals/2003/LIT-11626-16-05_22.pdf

May 31, 2012 | 2004 Yamaha V Star Classic

1 Answer

1980 CB900: Friend dropped his bike off for me to troubleshoot. Seems to only fire on one cylinder, #1. The others do not. Any ideas on where to start? I have checked the connectors at the front end as...


You have two coils with two wires each. If one plug wire is firing on a coil the other wire is also firing. Start by replacing your spark plug caps and your spark plugs . NGK makes plug caps for around $5 each. Spark plug caps unscrew off the end of the wire and should measure 5000 OHMs on a voltmeter. If they read higher or lower replace them. With any luck all spark plugs will now spark.

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3 Answers

Ignition Distributor location


There is no cap and rotor, as the vehicles igntion system is DIS (digital ignition system). The recommended tune-up on these motors require sparkplug and coil replacement. The coil type in this vehicle is COPs (coil over plugs). Usually moist and oxidation develope on the sparkplug chamber walls from faulty or worn coil boots. This causes the coil to short, they must be replaced at 75,000 miles at the same time the sparkplugs are replaced. Typical symtoms are: Vehicle stalls (restarts and runs normal), intermitted jerks/sputter while driving, misfires, rough idle, severe power loss. Hopefully this helps

Sep 01, 2009 | 1997 Ford Expedition

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