Question about 1998 Ford Expedition

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98 Expedition # 3 Misfire

I had my check engine light go on last night i took it to the local Autozone to havethe diagnostic test done it shows a misfire on # 3 they told that could be a number of things. Also i smelled something that smelled like fireworks coming thru the vents and noticed the smell on the passenger side ofthe motor couldthis be related? I could feel the truck shaking a little bit too when i would step on the gas.

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I just had the same problem and our mechanic said that 95% of the time if you changed the spark plugs and wires it would eliminate the problem. He also said that 1998 Expeditions were notorius for leaking anit-freexe into that particular spark plug by the hose that runs above it. We did as he suggested plus tightened the clamp on the hose to keep the anit-freeze from dripping and have had no problems since. The check engine light went off and it runs like a champ again with 135,000 miles!

Posted on Oct 16, 2008

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Bad spark plug wire coil pack that the most common thing smell and shacking sure its not running on all cylinder to find out what broken start the engine disconnect at coil pack cylinder number 3 be carefull not to get a shock disconnecting the wire if lots of spark to it back disconnect wire at the plug when removing it should here spark jumping if good change the spark plug it should fix it if not let me no good luck pierre

Posted on Sep 17, 2008

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