Question about 1993 Jeep Cherokee Country

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Not getting continuous power to the coil for spark

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The coil is not suppose to have continuous power

Posted on Jan 30, 2009

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Posted on Jan 02, 2017

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Not getting a spark out of the coil?


The proper procedure is to first check that the coil is getting power to the positive side of the coil with key in on. It must show power.

If the coil has power to it, then check if the controlling device is turning the primary to the coil off and on-this is what the Ignition control module (ICM) does. Or in some cases a "power transistor" is used to control the coil primary (some imports, for instance).

The ecu signals the ICM (or the power transistor) when it wants the coil to deliver a secondary surge through the coil leading to a spark. The ecu (or pcm) must get a signal from the crank position sensor so it knows when to time the spark.
So if no spark, check if coil primary has power, then check secondary coil operation-if no secondary (no spark), possibly bad coil, bad ICM, or missing the crank position sensor signal.

Jan 22, 2018 | Cars & Trucks

3 Answers

2005 Silverado 4.3 No Spark at coil, Where do I Start ?


Since you have replaced all of the parts, perhaps the problem is the wires. Check continuity of critical wires. Are you getting power to the computer, ignition module and coil? Check continuity of wires from computer to ignition module and crank sensor. Check for bent pins and pushed back female terminals in connectors.

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Jul 31, 2017 | Cars & Trucks

1 Answer

Is a special tool required to change spark plugs in the 3.2L engine?


you will need 5/8 spark plug socket as well as a long extension to replace spark plugs.That you can get at local auto part stores.Plugs are on either rocker cover....there are 3 ign coils on each rocker cover that need to be removed then remove the plugs You will need a 5/8 spark plug socket as well as a long extension to replace them 8mm socket holds the individual coils on.
------------ ON 3.2L there are acually no spark plug wires, the engine acually has whats called, coil over plug which means the the power to make a spark plug spark, happens right over your spark plug. Now in order to get to the spark plugs which are under the coils you have to first unscrew the screws, there'll be two phillips head screws per coil, after that just pull the coil out, it should be about 3 inches, the spark plugs are at the bottom of the hole that you just uncoverd, you'll need an extesion for your socket in order to reach them, take them out, replace, put the coil back on top making sure that its seated ontop of the spark plug, put the two screws back in, tighten and your done with one, continue for all.
---------------- this should help.thanks.Helpmech.

Mar 01, 2011 | 1997 Isuzu Rodeo

1 Answer

Car stalled at30mph and wont start back up


  • Cranks but no start condition-do below to determine whether it's fuel or spark issue:
  • Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.
make sure it is getting enough gas pressure

Dec 05, 2010 | Geo Prizm Cars & Trucks

1 Answer

No spark


your distributor sends trigger signal for coil, based on cam and crank position sensors test distributor output and sensors you can get info on troubleshooting from repair manual (purchase from parts store) under troubleshooting section in manual. You will need multi tester with continuity setting and dc volt setting.

Feb 04, 2009 | Ford Fairmont Cars & Trucks

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