Question about 1998 Ford Expedition
Spark plugs number starting on the passenger side, front to back, #1 to #4 and the driver side #5 to #8 front to back.
Posted on May 21, 2018
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
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.
Posted on Dec 10, 2008
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.
Posted on May 13, 2009
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.
Posted on Nov 29, 2009
Tips for a great answer:
Aug 16, 2012 | 1998 Ford Mustang
Feb 02, 2012 | Ford F-150 Cars & Trucks
May 06, 2010 | 1998 Ford Escort
Feb 17, 2010 | 1998 Ford Taurus
Apr 09, 2009 | 2002 Ford Thunderbird
Mar 23, 2009 | 1998 Ford Escort
Sep 16, 2008 | 1998 Ford Ranger SuperCab
88 people viewed this question
Usually answered in minutes!