SOURCE: Change the spark plugs
there are 4 large wires at the front of the engine on the cylinder head, carefully remove them by twisting the rubber boots back and forth until they come off, under those are the spark plugs, u will need a 3/8" ratchet and a short socket extension with a 5/8" spark plug socket on it, put the socket over the plugs and remove them reinstall in reverse order, 10 minute job on an escort.
SOURCE: 1998 ford f150 spark plug wiring diagram
try this website for any diagram for anything on your car or any car you want to work on: autozone.com
SOURCE: changing spark plugs on my 96 ford contour
A set of spark plugs usually requires replacement after about 20,000–30,000 miles (32,000–48,000 km), depending on your style of driving. In normal operation plug gap increases about 0.001 in. (0.025mm) for every 2500 miles (4000 km). As the gap increases, the plug's voltage requirement also increases. It requires a greater voltage to jump the wider gap and about two to three times as much voltage to fire the plug at high speeds than at idle. The improved air/fuel ratio control of modern fuel injection, combined with the higher voltage output of modern ignition systems, will often allow an engine to run significantly longer on a set of standard spark plugs, but keep in mind that efficiency will drop as the gap widens (along with fuel economy and power).
When you're removing spark plugs, work on one at a time. Don't start by removing the plug wires all at once, because, unless you number them, they may become mixed up. Take a minute before you begin and number the wires with tape.
Be sure not to use a flexible extension on the socket. Use of a flexible extension may allow a shear force to be applied to the plug. A shear force could break the plug off in the cylinder head, leading to costly and frustrating repairs.
SOURCE: what size gap does a 1998 ford ranger spark plug
4.0L = 0.052-0.056
3.0L = 0.052-0.056
2.5L = 0.042-0.046
SOURCE: 1998 ford ranger, number 3 cylinder mis fires.
When you change the plug what color is the tip of the old one? This could be the answer to your problems. It should be a light beige or tan if everything is working properly.Just take one of the old plugs down to your local garage and get the mechanic to have a look at it. He'll be able to tell you why it keeps misfiring. Hope this helps.
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