Question about Yamaha Yzf750r Yzf750sp And Yzf1000r Thunderace Service And Repair Manual

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I have no spark at all while turning over engine, everything else works as should , even with spark plug in cap gounded to frame on initial ignition switch on a spark is seen but during engine turnover there is nothing

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Check the cable which connects HT coil if there is no spark there then you have to check the coil.

Posted on Apr 01, 2011

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My 91 Acura legond moter cranks over but won't start


Engines need 3 things to run-spark, compression and fuel/air. Check the simplest things first. When you turn the key and the warning lights come on, does the check engine light come on? It should turn off in 6 seconds, if everything's ok. I Check the air filter, make sure it isn't plugged up. Take off the oil fill cap, and look in. I believe you can see the rocker/cam, use a flashlight. Have someone crank the engine with the key, see if the cam turns, rocker moves. If not, broken timing belt. Next remove an igniter, put a plug in it, have it plugged in and hold the plug near a ground. Have it cranked, check for spark. If no spark, it needs more professional diagnostics. If yes, Fuel is left. If you sit in the drivers seat, windows up and quiet, turn the key to run, all the warning lights come on. The fuel pump runs for 2 seconds, a low hum from the back. You can usually here it if it is quiet around you. (Just because it makes noise, doesn't mean it's good.) Your car also has a main relay that powers the fuel pump, a common failure. Last thing to try is starting fluid sprayed into the throttle, throttle open 1/2 way, while someone cranks.
One of these should lead you to the failure. Note: the main relay is powered by the ignition system, except for that initial 2 seconds. So if there is no spark, the fuel pump won't work either.

Oct 23, 2014 | 1991 Acura Legend

1 Answer

Engine won't start. Getting no spark.


Have you check to see if the timing on the car is right?

Nov 08, 2013 | Cars & Trucks

1 Answer

I tried starting the car it will turn over but there is no spark from the spark plug and the distributer is turning


Can i ask you how you tested the spark plug to know if it was sparking or not?if done correctly then you should try new spark plugs.
be very careful with the distributor cap as i got a shock from it one day and think it carrys a 1000 volts seems very untrue as it runs of a 12v battery and im writing this but a mechanical teacher told me it was that or even higher.i can tell you i felt it like no other shock and i have had a good few of them so just mind that.some of your spark plug leads might be broken or damaged which would cause loss of spark to plugs.im not a mechanic and thats all i can tell you about it.obviously it wont start if it has no sparks to ignite the petrol so id follow the whole sparkplug system from the plugs back to where the wires going to them start till you find problem.i think there is an ignition igniter which could have something got to do with the actual spark being sent to the plugs.it is wired to the ignition so as when you turn the key it should send a spark to your distributor cap and then onto plugs.
on my starlet the ignition igniter was a small steel box the size of a matchbox and it was fitted on the frame of the car under the hood right behind the engine on the passenger side from what i can remember it had wires goin to it and maybe a small bracket for it.if your car is turning over and over strong then there should be enough power in battery to send a spark.let me know if that does anythin for ya

Nov 08, 2012 | Honda Civic Coupe

1 Answer

Trying to figure out what the name of a part is


That would be the ignition coil, the part that creates spark at the spark plug. If you follow the electrical path from the coil wire to the distributor cap, and from there, the spinning rotor just under the distributor cap carries the path from the coil wire at the cap's center to the spark plug wires around the dist. cap, and through the plug wire to the spark plug.
The high voltage causing the spark is created in the ignition coil by the engine computer at the precise right moment signaling an ignition module to cut 12 volts current to the ignition coil. This causes the coil to internally build up high voltage which is passed through the coil to distributor cap wire. The computer knows the precise right moment to initiate spark from engine sensors, primarily the crank position sensor and the cam position sensor.

Nov 06, 2012 | 1999 Dodge Durango

1 Answer

Engine is turning over,but not starting


first, test for spark at the ignition coil. take the power cable that connects from the ignition coil and disconnect the end at the distributor. hold the bare connecting end a fraction of an inch away from a metal paqrt of the cars frame and attempt to start. if the ignition coil is good, it should throw a spark. if the ignition coil sparks, next check your spark plugs for oil, grime, black or white discoloration on the spark tips (that point inside the engine). if there is a lot of build up or discoloration, replace the spark plugs. if this does not solve it, change your distributor cap, and if this doesnt slove it, change your spark plug wires.

Mar 13, 2011 | 2008 BMW 5 Series

1 Answer

No start new plugs,cap,rotor new coil icm modual put starting fluid in still no start will turn over all day


1. Check the spark plug gaps. It should be adjusted
to the thickness of a hacksaw blade.
2. You replace almost all of the ignition parts but not
the hi-tension cables of the plugs and the coil.
Have this replaced.
3. Check all the plug for sparks. Sparks must be blue
in color to indicate good voltage to burn the fuel
and run your engines.
4. When everything in the ignition is working, check
the fuel at the carb if it has a good spray.
5. Check the air-fuel adjuster at the carburetor. From
full close position, turn 2-1/2 full turns counter
clockwise.
6. Then, start your engines and go.

Nov 01, 2009 | 1993 Ford F150 SuperCab

1 Answer

Hi,I've a 98 Fireblade and can't get a spark


Hi and welcome to FixYa,

To my understanding, there are only 2 wires from the ignition pulse generator:
  • yellow - pulsating 0.5 VAC when cranking; and
  • white/yellow - ground.
A couple more of initial checks:
  • IGN +12 on the black/white wires of the ignition coils;
  • IGN +12  on the 3 wires of the engine stop relay other than the red/orange;
  • 0 volts on the red/orange (red/white) wire from the BAS (bank angle sensor).
Good luck and thank you for asking FixYA.

Aug 20, 2009 | 2001 Honda CBR 929 RR Fireblade

1 Answer

1988 Jeep Cherokee 5 liter motor straight 6. Runs one day, and then the next day, no power to the spark plugs. It seems to have a mind of its own. Even while driving, it seems to lose power to the spark...


At the age of you Jeep I would be looking at a worn ignition switch (The part that turns when you turn the key).They wear out causing a very intermitant connection some times it works and some times it doesn't ,Going over a small bump in the road is often enough to break the connection causing the engine to stop.
Start the engine and try gently wiggling the key and see if it dies.....
Hope this helps.

Jul 21, 2009 | 1988 Jeep Cherokee

2 Answers

Doesn't start


I assume that when you started the car the starter was running and the engine was cranking.
Remove the #1 boot from spark plug 1. Insert a screw driver to the booth, bring the screw driver near the engine body (about 2 mm) and let someone start the engine. If there's no spark, replace the ignition coil. If there's a spark, check the ignition timing with a strobe light.

Before changing the ignition coil, make sure that the wires connected to it are alright. Remove them from the coil and switch on the engine. Measure the DC volts from the wires. You should get a 12 volts reading between them.

Feb 25, 2009 | 1995 Suzuki Sidekick

2 Answers

I have a 2005 cobalt that I bought used. Everything seemed fine. Lately when I try to start it nothing happens when I turn the key. The lights come on and are bright but it won't turn over and the radio...


Priority Action Part Type Cause 1 Inspect Battery Damaged or faulty battery and/or connections. grey_line.gif 2 Inspect Coil - Ignition Damaged or faulty ignition coil or ignition coil circuit. grey_line.gif 3 Inspect Fuel Filter Clogged or dirty fuel filter grey_line.gif 4 Inspect Fuel Injector Pressure Regulator Faulty fuel injector pressure regulator or circuit. grey_line.gif 5 Inspect Fuel Pump Improperly functioning fuel pump or circuits. grey_line.gif 6 Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). grey_line.gif 7 Inspect Control Module-Ignition Faulty ignition control module or circuit. grey_line.gif 8 Inspect Solenoid Switch Damaged or faulty solenoid switch or solenoid switch circuit. grey_line.gif 9 Inspect Starter Damaged, worn, defective, or faulty starter or starter related circuit. grey_line.gif 10 Inspect Neutral Safety Switch Damaged or faulty neutral safety swittch or circuit. grey_line.gif 11 Inspect Fuse Corroded, burned, or shorted fuse may be interupting power source. grey_line.gif 12 Inspect Fusible Link Corroded, burned, or shorted fusible link may be interupting power source. grey_line.gif 13 Inspect Battery Cable Corroded, broken or poorly connected battery cable. grey_line.gif 14 Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor. grey_line.gif 15 Inspect Distributor Cap Loose or cracked distributor cap grey_line.gif 16 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. grey_line.gif 17 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. grey_line.gif 18 Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector. grey_line.gif 19 Inspect Ignition Switch Worn, damaged or faulty ignition switch or circuit. grey_line.gif 20 Inspect Spark Plug Fouled, damaged or broken spark plug(s). grey_line.gif 21 Inspect Belt Incorrectly routed, adjusted(tensioned), missing or worn drive belt(s). grey_line.gif 22 Inspect Timing Belt Slipped or broken timing belt. grey_line.gif 23 Inspect Timing Set Slipped timing chain or worn timing gear(s). grey_line.gif 24 Inspect Fuel Tank Contaminated fuel from rusted or deteriorated fuel tank. grey_line.gif 25 Inspect Ignition Timing Incorrectly adjusted engine timing.

Nov 29, 2008 | Chevrolet Cobalt Cars & Trucks

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