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Hooked up battery backwards on 1992 explorer, not getting any spark. Traced everything back to the coil pack. Could it need a new coil pack

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  • Cars & Trucks Master
  • 880 Answers

Most likely fried the ecm. run 12 volts to coil pack positive side a see if you get it to crank. oh by the way check that battery is installed correctly and that it is putting out 12 volts

Posted on Jul 20, 2013

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6ya6ya
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Posted on Jan 02, 2017

jasperoni
  • 203 Answers

SOURCE: mercedes c200 elegance 1996 model mis-firing on cylinders 1-4

I beleive your firing order is 1 3 4 2. 1 and 4 are companion cylinders-meaning the piston is up or down at the same time i.e. compression and exhaust stroke both pistons are up and even on the exhaust stroke the ignition fires in order to burn unburnt fuel/ h ve you checked your trigger. There is a good coil testing tool that is placed over the coil and has a magnetic pickup that allows you to see if the coil is being triggered-just because you have power doesn't mean that you will have spark. I would replace your ignition wires and look at your wiring harness very carefully- if it is very brittle and you see bare wires exposed that is your most likley problem because the trigger is working for 1 and 3 and has the crank senser input for all for spark plugs and the cam senser is used for ignition advance and your fuel injection system. try wiggling your harness and see if your coils start to work. wireharnesses are a major problem on mercedes benz vehicles of that era. I hope I have been helpful

Posted on Jun 18, 2009

  • 1986 Answers

SOURCE: No spark from coil pack

The most common reasons for them going out are not using dielectric grease properly when installing, and from washing your engine.

I believe this was a huge issue with Volkswagen vehicles

Posted on Aug 25, 2009

  • 1114 Answers

SOURCE: 2005 Ford Explorer cylinder 5 misfire, I changed

Keep in mind the spark plug wires is what transfers the electricty from the coil to the spark plugs #5 is bad then it is not going to receve proper curent.So usaly it is ideal to change all at the same time!don't forget to disconect battery to reset computer takes a couple of minutes to reboot the computer.Merry Christmas

Posted on Dec 26, 2009

alicantecoli
  • 22095 Answers

SOURCE: 2001 ford windstar-new coil pack,new spark plugs

head gasket?? blowing between two cylinders

Posted on Mar 19, 2010

cansmo
  • 2431 Answers

SOURCE: 1998 Ford Explorer, 4.0 SOHC No

You are at thhe right trail what controls spark is coil pack crank sensor sparkplugs and plug wire but the most important is power . I mean 12 volt connections and ground This includes checking fuses you need a simple volt meter doesnt have to expensive or fancy just to pick up 12 volts let start with fuses in the engine juction box (there not mark to what it belongs to) make sure none are open. especially fuse 19 and 24 , next go to the crank sensor make sure the tabs are snuggly on now to the coil pack there is a red and light green wire this comes from ignition and feeds 12 volts at the coil pack measure that voltage is it 12 volts if not correct it this is from ignition switch ( you can make a tool that feed 12 volt with a wire and a fuse in series and attatch it to battery and the primary wire this is known as hot wire) next go to the ECM wiggle the wires see if that get a connection going if not go back to the ICM here are the wire you are to measure the tan light green, this is from ECM and it is pulsed it measure 5vlts to 0 volts switched then measure the tan orange the same thing 5 volts to zero,then tan white again 5vlts to zero. any one of these 5 to zero fails you fix is the ecm

Posted on Aug 21, 2011

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The spark plugs receives power to spark from coil pack.Check the power at the coil pack and also check the voltage at the coil pack with meter.If the coil pack shows proper power as well as voltage then its fault in spark plugs.Otherwise its faulty coil pack.The coil pack receives power from battery.so also check the voltage of the battery it should be exact 12 volt.
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Thanks. you can rate this solution and show your appreciation.

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