Question about 1999 Mercury Mountaineer
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Posted on Jan 02, 2017
SOURCE: 2002 Mercury mountaineer
you may have a bad coil---take a pair of rubber handle plyers & remove the spark plug wires 1 at a time---when you pull off a plug wire you should notic the truck runs even worse---the one you pull off & it doesnt change the way it runs--that is the cylinder that has the problem
Posted on Jun 28, 2008
IIRC these are a coil over design. meaning the coil is over the plug. the coil should have one 8mm bolt holding it on the lower intake manifold. remove the coild to get to the spark plugs. look by the fuel injectors, coil should be just next to it or very close. coil usually says motorcraft on it and circle in design.
Posted on Feb 09, 2009
SOURCE: I have a 1997 mercury
youll need to check the vacuum lines on the 4.6 engine in the back where the pcv valve is look when running , the engine is the pcv hose collapse? is there any vacuum hose leaking at idle, this will cause a lean misfire upon accleration. okay no vacuum leak let the vehicle cool off.when this vehicle is cool you are going to run a test you can do this you did a tune up. start the engine test the EGR the top of the valve. does it get hot? feel for it . does it get warm. I mean like it get hotish. this valve can be stuck open. okay , do this on the EGR is a hose pull it off does the idle from rough go away? if it does this is the problem.You did everything right you need to solve for vacuum leak use your ears
Posted on Apr 28, 2011
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