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Re: ignition ccoil replacement 4 and 6
The last number in a po30 code is the cylender with the missfire. you say you have po306 and po302 which means #6 and#2 are missfiring. if you stand in front of car the passenger side has 1 through 4 cylenders starting with # 1 in front and # 4 in rear and driver side has 5 through 8 starting with # 5 in front and # 8 in rear. passenger side 1 2 3 4 - driver side 5 6 7 8. if you have indavidual coils on each plug then just unplug the coil and take the single 7mm screw out that holds it in place and the coil will come straight up off the plug
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they should have lasted longer. there are special tools to diagnose the ccoil packs. sometimes I use a spray bottle filled with water and I spray the coils packs if they are sparking then they are bad .
I got code PO 305 on a 2002 Mercury Grand Marquis, what is the spark
plug wire part called This will have a direct coil over ignition with a coil over each spark plug. The coil is the electrical part over the spark plug. The coil also has a rubber part that is called the boot or spark plug boot. The boots can be purchased separately but the coils will come with new boots.
is it #5 coil,
Have you checked to see if there is any spark coming out of the number 5 coil?
and should I replace the coil and
spark plug and what should the spark plug be gapped at?
When was the last time the spark plugs where changed? It may be due for all the spark plugs to be changed. The spark plug gap is usually listed on the emissions sticker under the hood. It should be .050 - .056 or very close to that.
unplug the coil on the plug your replacing, unbolt the coil there are 2 small bolts holding it in place twist and lift it from the plug re install. suggest you replace the plug as well. hope this helps
do you have the 1 coil for each spark plug if so they are easy to change disconect the wire clip to the unit and take the small bolt out then just lift off the old coil replace the plug make sure to check your gap and reinstall very simple
cheers and best of luck