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Mercc2001996 will not fire on cylindes 1and4 have fitted new plugs and coil

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  • Cars & Trucks Master
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DIY? Tripple check your work. There is a bad connection somewhere. Good connections need bright metal on both connectors.

Posted on Apr 15, 2015

Testimonial: "Still no good checked ecu connections cut out and renewed bad wires have contiuity from ecu to both coils still only 2/3firing."

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Why is it only firing on cylinders 2 and 3?


If you have replaced the coil that is not firing then you need to check the module remove the ignition coil that is not firing and you will see the two spades that fit into the coil that's were you test if it if it will run on two cylinders take a test light clip one side of test light to one spade use the tip of the test light to touch the other spade and running or even cranking over it should blink if not replace module

Apr 08, 2016 | Cars & Trucks

1 Answer

2001pontiac sunfire 2.2


Hi barb,here's your firing order.

Feb 13, 2013 | Cars & Trucks

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1993 Nissan 300zx: Number 4 cylinder doesnt fire.


Please read about misfire diagnosis and repair here.

Oct 01, 2012 | 1993 Nissan 300ZX

1 Answer

06 ford fusion v6 has number 3 cylinder misfire. new coil, new plug still no fire


try switching plug and or coil with another cylinder to see if misfire moves, you might have got a bad replacement part.

Sep 03, 2012 | 2006 Ford Fusion

1 Answer

2007 Fit stutters when put in gear when in park ideals great new plugs in it it seems like it has a miss fire on one of the plugs


REPLACE FUEL FILTER,REPLACE AIR FILTER CLEAN FUEL INJECTORS SEE IF IT HELP THE PROBLEM. MISS IN ONE CYLINDER COULD BE BAD COIL OR FAULTY FUEL INJECTOR.

Sep 24, 2011 | 2007 Honda Fit Sport Hatchback

1 Answer

Need to know firing order on audi a3 1997 and the order from coil pack as we fitted new coil pack now car will not start car was running on 3 now new coil pack fitted nothing


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Fig. The 1.8L cylinder location as viewed from the front of the vehicle. The firing order is 1-3-4-2


The above is for an Audi A4 from 1997. I didn't find an A3, unfortunately, in the U.S. market, on the Autozone.com website.

Jan 08, 2011 | Audi A3 Cars & Trucks

2 Answers

1990 Subaru Legacy shorted out the ignition coil. I replaced it and in less than 1 mile,it shorted out the new one.


Subaru engines (including Legacy and engines of many other automobiles, GM, etc.) have returned to so-called wasted spark ignition systems since advent of the electronic distributor-less ignition (having been used historically in early engines with magneto ignitions). With this approach, the ignition systems are less expensive and usually quite reliable. At the same time, however, a shorted spark plug (cracked or carbon clogged, etc.) (or bad ignition spark plug wire) grounds both the ignition spark and the false spark being used. This means that it also grounds the corresponding respective ignition spark of the other 180 degree out of phase cylinder (that uses the same the same coil because the spark current is connected to the spark plugs of two cylinders). Since such a defect allows more current to flow in the spark coil to two plugs when the resistance of the spark plug gap disappears due to a cracked plug, etc, it seems likely to hasten coil burn out if the spark plug/plug wire defect is not corrected before installing the new spark coil.

To explain further, wasted spark means that when a cylinder is ready to fire, it gets a spark to its spark plug while part of the spark (from the same coil and current) as a sort of copy is also sent to another cyclinder at the same time but when the piston in that cylinder is exhausting its ignited gases 180 degrees out of phase from when its spark is needed. When the second cylinder is ready to fire and receives its "spark, the first cyclinder the also receivesa "wasted" spark "copy" of the one needed by the second cylinder. Economy is achieved in manufacture because otherwise electronics would have to turn on and off four different spark coils to distribute four different sparks as needed to the four cylinders. With wasted sparks (which are cheap), because the spark current of one coil is connected (internally in the ignition coil unit) to two cylinders that are in the same position but 180 degrees out of phase in firing, the system can turn on and off two spark coils twice as fast with half the electronics and fire two cylinders that are 180 degrees out of phase. A four cylinder engine thus uses only two coils, a six cylinder engine, three coils, etc., in a wasted spark system.

Jul 27, 2008 | Subaru Legacy Cars & Trucks

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