Question about 2000 Mercury Mountaineer
The vehicle will only OCCASIONALLY start. engine light diagnostic done and came back with an o2 sensor replacement needed. Would an o2 sensor cause the vehicle to no crank? I conducted a batter test (good) alternator (good) and spark plugs (good) starter also (good)
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Posted on Jan 02, 2017
SOURCE: My mountaineer won't start.
If the engine is turning, but slow, she may need the battery terminals cleaned, if it has sat for over a year, yes, it may need a new battery. If the engine is turning over and she is not cranking up. Standard rules apply... does she have fuel? does she have spark, does she have compression? First thing is easy, get a can of starting fluid and give her a spray in the air filter area during cranking, if she pops off you have spark, which means no fuel. If it does not try to hit, that means no spark and more trouble shooting will need to be done. If it starts on starting fluid, you may have a bad fuel pump. AS gas turns to gunk as it dries up. And that may have gummed up the pump and filter. Hope this helps FixYa up.
Posted on Sep 12, 2011
SOURCE: 2000 Mercury Grand Marquis
if the moisture was on the outside of the plug most likely water got into the hole. this causes high stress on the coil and causes them to break down. If the plug was replaced and the symptom returned
i would replace the coil.
Posted on Dec 21, 2008
SOURCE: my battery light is on
Sounds like your voltage regulator is acting up, and at times will not let alternator voltage reach the circuit. At this point car stars drawing on battery alone (triggering battery light) and working until it is out of juice. Before you buy a new voltage regulator, make sure that its contact points on the alternator, and the plug from it to the vehicle circuit is clean, shiny and making good contact. These parts, due to their location tend to collect dirt and moisture, leading to an intermittent performance before they stop working completely.
Posted on Oct 02, 2010
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