To change the back three spark plugs is tough!!! First you will need to remove the air intake boot that goes into your intake manifold along with the thin PCV valve line that goes into the air boot. The second thing that you will need to take off is that black plastic guard that runs along the very top back of firewall. It is held in by 3 plastic screws. This is the best access you will have to it. You will need a medium sized extension and a large size extension. You will have to use them in different variations to get the plugs out. It will take some time but just feel around and you'll be able to get them. The rear spark plug on the far passenger side may be easier reached by going underneath of the car and up through the wheel well or you could take off the distributor cap and get it that way. But bny removing the distributor cap may throw a wrench into your gears by mixing up your timing. Hope that helps
Once you have old plugs out make sure and replace with Platinum plugs that last 50,000 miles. Then only have to change plugs every 50K.
GOOD ANSWER FOR THE MOST PART, HOWEVER, IT WILL SNOW VERY HARD IN HADES BEFORE YOU EVER GET THE LAST PLUG BY HE PASSENGER SIDE (UNLESS OF COURSE MR. FANTASTIC COMES OVER TO HELP)...
TO GET THAT LAST PLUG OUT, YOU WILL BE LEANING BACKWARDS ON YOUR FENDER WHILE REACHING BACKWARD AND DOWNWARD AND FORWARD AT THE SAME TIME IN ORDER TO GET THAT PLUG OUT, AND IF YOU THINK THIS IS BAD, WAIT TIL YOU HAVE TO PUT IT BACK IN....
BY THE WAY, DONT FORGET TO GAP THE PLUGS FIRST, YOU DONT WANT TO REPEAT THIS ANYTIME SOON...
I unbolted the back 2 motor mount bolts by the passenger side front tire. Then put a floor jack under the motor so it would roll forward when raised. still a little tight but worked great for me.
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The easiest way is to take vehicle to a machanic and have him do it.
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No you shouldn't have to. It will make things a little harder if you don't. I change my spark plugs on my 93' Continental and I never take anything off to do it. 1998 is the first year they used coil on plug system. If you have coil on plug, you will have to remove the plates covering the coils , then slide off the coils and use an extender to reach the spark plugs. This is what I have to do on my 1998 continental.
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