Question about 2005 Mercury Mariner
I had a tune-up and oil change but oil light comes on when stopped at a red light. Goes off when driving. ??? Seems to run rough / labored at stop light or idling.
Posted by Anonymous on
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Posted on Jan 02, 2017
I am a Ford tech (35 years) and this is the cause of the problem in about 90% of the cars I see with this problem.
Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Posted on Apr 29, 2009
Check your PCV valve tube (to the right side of the top of the engine. When mine did this, the tubing for the PCV valve had dry rotted and cracked, thus losing pressure and stalled the car. Ford parts department has these at any dealership if that is the problem.
Posted on Jun 20, 2009
there are two types of displays heres both.hope this helps.for base instrument cluster.
1) press and release trip/reset button until setup menu hold reset displayed
2)press & hold trip/reset untilreset for sys check or sys check hold reset is displayed
3)release trip/reset button
4)press and release trip to scroll until hold reset if new oil is displayed
5)press and hold resetuntil oil life set to 100% and let button go you are done.
if you have a message center dash display then do this one. 1)push and release setup button until you see press reset to begin (2)press& release reset button until hold resetif new oil is displayed.(3)press and hold reset for 2secondsuntiloil set to 100%. done. hope this helps.
Posted on Jan 27, 2010
Sounds like you might have a stuck open EGR valve. Is the check engine light on. I would replace the fuel filter if it hasn't been replaced, also check the air filter.
Posted on May 31, 2010
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