Question about Cars & Trucks
Replaced coil pack and module same rersult
Posted by Anonymous on
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Posted on Jan 02, 2017
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
You can by a new Coil pack from Auto Zone for less then the dealer's cost and Auto Zone can give you the step by step instructions for you to replace the coil pack free of charge and will take about 1 hour if your good with common tools. Auto Zone also can scan your car for DTC codes Free of charge to ensure that it's the coil pack. The other common problem that will also seam like a bad coil pack is a bad ignition module which is what I am leaning towards since it's three of the cylinders you mentioned, most of the time it's just one of the two coils that will go bad which would only make two of the cylinders go dead. Check the wires to the electronic module first and then the switch the coils and see if the same two cylinders are still dead, if the same cylinders are still dead. Good chance that it's going to be the module and if the other two cylinders go dead and the dead ones come alive then it's going to be the coil pack. Good luck and here is a you-tube link to the ignition module and coil pack replacement procedure. keep me posted, be glad to know you got your car running 100% again . http://www.youtube.com/watch?v=8XgHM1i5jK8
Posted on Oct 27, 2009
go to autozone.com and set up a free account. You will then have access to vehicle repair guides and can get all the info and diagrams you need, plus help with troubleshooting! Hope this helps!
Posted on Jan 02, 2010
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