Question about 2001 Mercury Sable
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Posted on Jan 02, 2017
SOURCE: I have a 2002 Mercury
You have a vacuum leak some where. Engine uses vacuum to burn gas vapors in gas tank. This is the EVAP SYSTEM. This system can detect a small leak or large leak. (gas cap light.) But there are also other items on the car that use vacuum to do work. The PCV circuit . This vents the engine's crank case. Also power brakes and some ac/heater controls. Now it sound like a good size vacuum leak if car idle is "high". I would say open the hood and listen. When car first starts idle should be around 1500 rpm or so. If you have a tachometer in car. then as it starts to warm up the idle should start to go down. Then listen for a hiss around the center of engine compartment. the black tube and ribs looking thing is your intake where vacuum ports would start. Check line or hoses to see if cracked or broken. Ford/Mercury like to use hard plastic for lines and become brittle after a while and break.
Posted on Dec 19, 2010
Barring any vacuum leaks, P0401 is indicative of a bad EGR valve. Hope this answers your question. Best of luck.
Posted on May 30, 2009
It sounds like the misfire monitor turned the check engine light on. What you are saying is the vehicle ran rough when started cold and as it warmed,it straightened out, but the check engine light stayed on. If what was causing the miss has corrected itself,you can try disconnecting the battery and let it sit for about ten minutes. Then reconnect the battery.This may allow the PCM to reset and the light to go out.
If the concern happens again tomorrow,you need to have the code pulled so you can get to the cause.
If you want to send me the code,I will be happy to look it up and give you some information. If you decide to do this,send me the engine size too.
Good luck,I hope this helps,Chuck
Posted on Dec 22, 2009
this is a difficult one..
check for vacuum leaks by possibly a visual inspection and then spraying starting fluid around hoses , intake and so on..if any change, you might have found a vacuum leak/bad gasket.
otherwise, DO clean the Idle Air Control Valve 1st.
then check and clean EGR valve next..
Posted on Sep 30, 2010
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