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Spark jumps between coil terminals what is causing this

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Bad coils, or warn wires. Any cracks between coil contacts? if not, check wires

Posted on Jul 13, 2009


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I'm having trouble getting any spark

Check there is 12 volts + terminal of coil , Check the coil HT cable resistance is within specs , remove the center Ht cable from the distributor , hold it a 1/4 inch from the engine block, have a helper engage the starter , a good spark should jump from the cable to the engine block. also check the spark plug Ht cables and renew if not to specs.

Dec 27, 2014 | Cars & Trucks

1 Answer

2000 Honda CRV won't start, turns over, no spark

Do you have a spark at the coil? Try pulling off the cable, and with somebody inside to crank the engine, check to see if there is a spark jumping from the center high-voltage terminal. If you have no spark, you may have a bad coil or bad electronic ignition module.

Jan 12, 2014 | 2000 Honda CR-V

1 Answer

1993 Ford F-750. 7.0 fuel inj. PFI type. No start, has good inj. pulse,psi good etc. No spark, reman. dist.,coil and firewall ign. module has been replaced. Both modules tested ok. Wiring-Help!!! ...

Hi, I do not have wiring diagrams for the F-750, but I'm assuming the ignition systems are similar for all trhe F series trucks. Are you getting battery voltage to the coil when the key is in run and start? If not, first verify the fuse is good. If there is a noise capacitor on the positive coil wire, remove it temporarily while troubleshooting. If that cap is causing low voltage to the coil, replace it. If you still cannot get power to the coil, the problem may be the ignition switch. If you have power to the positive coil terminal, pull the coil wire out of the distributor and lay it on the engine where it has about a quarter inch gap to engine ground. Turn the key on and momentarily jump a ground wire to the negative coil terminal to see if it will release a spark. If the coil will release a spark this way, the problem is back in the distributor. Was everything in there replaced? Please let me know if you have questions.


Mar 07, 2011 | Ford F Cars & Trucks

1 Answer

I have a 1967 malibu and I am not getting fire to the distributor.

try this: turn key on, momentarily jump negative coil terminal to ground to see if coil will release a spark. If no spark, use a test light to check for voltage at positive coil terminal. If there is voltage, replace the coil. If no voltage, suspect ignition switch or fuse.
If coil releases spark, check breaker points operation. If points ok, replace condenser.

If you have questions, please let me know.

Oct 11, 2010 | Chevrolet Malibu Cars & Trucks

1 Answer

How ca you tell if the coil is bad

with key off, pull coil wire from distributor and hold it near a ground point. put a jumper wire from positive battery to positive coil terminal. Briefly jump the negative coil terminal to ground. Coil should release a spark to ground when ground is removed from negative terminal. Make sense?

Oct 05, 2010 | 1996 Pontiac Grand Am

1 Answer

I have a 1990 Nissan California Wagon, 1.5L 12Valve 4cyl Gas engine. I'm not too sure if it's the ignition coil, my engine cannot start on one (1) turn of the key, you need two or more or with a blip of...

If the coil is leaking oil, replace it. I'm not saying this will fix the car, but the coil should not leak oil. It's possible a crack in the coil will cause sparks to jump to the coil terminal rather than to the spark plugs. If you want to troubleshoot, have someone try to start the car while you watch/liosten at the coil to see if the sparks are leaking out to the terminal. If yes, perhaps the coil is your only problem.

Sep 03, 2010 | Nissan Sentra Cars & Trucks

1 Answer

Where is the negative side for my ignition coil?

In all the automotive vehicle the positive terminals are connected to the body/frame. the wiring which runs around for all the electrical part is always negative terminal.

Smilarly the ignition coil lead is one terminal & the body of the spark plug is other terminal.

That is the reason you see the spark jumps from the center to the lug in spark plug.

Jun 05, 2010 | 1997 Hyundai Accent

1 Answer

The Jeep has set for about 6 months. A week ago: battery dead, jumped it but would not start. I replaced the coil, jumped it and it started instantly and ran better than it has in years. Yesterday, I...

Check to see if you have spark at the coil. If you have spark at the coil and no spark at the plug, you probably have a bad distributor cap and/or rotor.

If there is no spark at the coil, you need to find out if there is voltage present at the B+ terminal of the coil.
No B+ could be anything from a bad ASD relay to a broken wire or burned fusible link.

If B+ voltage is present at the coil, the "NO-SPARK" condition could be caused by anything from a bad Crankshaft Position Sensor (CKP) to a bad Ignition Control Module (ICM) To a bad Electronic Control Unit ((ECU) - AKA Engine Control Module)

Nov 02, 2009 | 1989 Jeep Grand Wagoneer

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Wont start

If there is full battery voltage to "+" terminal of coil but the spark from the coil won't jump more than 1/4 inch the coil is likely the problem. If the coil has been replaced, be sure the wires are on correctly. The coil is triggered directly from the Powertrain Control Module. It may be bad if the coil checks out. If you find that there is significant voltage drop to the coil, find and correct the reason for the loss.

Sep 06, 2008 | 1996 Dodge Ram

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