Question about 1994 Mercury Grand Marquis
Mercury stalls when in line and stopped
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Posted on Jan 02, 2017
SOURCE: 1994 Topaz engine stalling
Normally this kind of a problem is a fuel block...there so many other ways to block...other than the filter
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Posted on Aug 15, 2008
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
its the tube going from the egr valve to your exhaust it have carbon build up and you either have to replace it or get a metal coat hanger and clean it out.
Posted on Sep 26, 2009
sudden failures are usually the blend door actuator. Unfortunately, you have to remove the dash to get the actuator out. It sits on top of the heater box in the second picture below. I have pasted the procedure below from autozone.com. Please see my tip at http://www.fixya.com/cars/r6235876-no_heat_fan_blowing_cold_air . If you get stuck, please get back to me, and thanks for using FixYa.
Do not rotate the steering column shaft.
Posted on Dec 25, 2010
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