Need spark plug wire diagram for 2.5 mercury mystique

You can find wiring diagrams by vehicle make and year at auto parts stores like auto zone and pep boys.

Firing order of 1998 mercury mystique

Cylinder 2 is misfiring. Spark plug could be faulty or spark plug wire could have broke internally if you didn't replace them at the same time. Swap cylinder 1 and 2s spark plugs clear code and drive again. If Same code comes back plug is good look at wire if code p0301 come up the spark plug is no good

The ignition control module on your car is located right on top of the engine. Follow your spark plug wires up to where they all plug in to a small black box often referred to as the ignition coil. Thats it. The ignition control module is integrated into the coil on this car. Hope this helped.

Please go to this link for misfire diagnosis and testing.

Find the emissions sticker- usually either on the radiator mount or on the underside of the hood. This permanent sticker contains all the vital information you need- firing order, spark plug gap, timing, etc....

I hope helps with this...



Good luck (remember rated this help).

You didn't post your engine size so please pick the applicable motor:






Firing order and spark plug wire installation for the 2.5L engine





Firing order and spark plug wire installation for the 2.0L engine

ignition timing or valve timing?

ignition timing not setable.

info:
The ignition system consists of an ignition coil, spark plug wires and spark plugs.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is digitized by the powertrain control module. This digitized signal is then used to position the closing time of the primary circuit of the ignition coil.
Ignition angle is determined by the powertrain control module in response to engine operating conditions. Once ignition angle has been determined, the powertrain control module interrupts the current to the primary circuit of the ignition coil thus triggering the ignition spark which is supplied to the cylinders through the spark plug wires and spark plugs.
The ignition coils are triggered by the powertrain control module in pairs (cylinders 1 and 4 and cylinders 3 and 2) sending one ignition spark to the firing cylinder and one ignition spark to the corresponding cylinder on the exhaust stroke. This make sures that any unburnt fuel residues remaining in the cylinder on the exhaust stroke are re - ignited to provide cleaner exhaust emissions.
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Here's the firing order: