Question about 2004 Mercury Sable
While driving, car might stall for a second (like hiccups) sort of "drags" and continues on
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Posted on Jan 02, 2017
make sure that the gas cap have a rubber gasket in it if it has accidentaly dropped off while you removed to fill the tnk it will not seal properly and create a vacum leak causing the ecm to turn on the light.
or did you have an accident or did you run over any thing that could have damaged the vapor canister at the bottom of the vehicle and if this is the case you will see the light on because a damaged canister can cause a vacum leak
Posted on Nov 11, 2008
SOURCE: 2001 Mercury sable bad idle
CHECK THE PCV VALVE HOSE THAT CONNECTS AT THE BOTTOM OF THE THROTTLE BODY, THESE HOSES ARE KNOWN TO DETERIORATE AND ALLOW UNMETERED AIR TO ENTER THE COMBUSTION CHAMBER, WHEN THIS OCCURS THE OXYGEN SENSOR'S SIGNAL TELL THE PCM TO INCREASE THE PULSE WIDTH OF THE INJECTORS CAUSING THE VEHICLE TO ALMOST STALL.
Posted on Feb 27, 2009
I had a similar problem. I found the filter cartridge below the pcv valve had carboned up, and after the crank case pressurized, oil was forced out the pcv supply line to the throttle body. The idle air control valve solenoid got oil in it and caused my problem, but only when it was cold. The pcv cartridge is accessed by removing the pcv valve and the rubber fitting that the pcv valve mounts in. It can then be fished out with a pick set, and it is a pain because you can't see it, but you can get you hand back there. I hope this helps you.
Posted on Feb 28, 2009
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
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