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My 2005 Mercury Sable Ls V6 3.0L check engine light has come up and im trying to figure out what it is. When my car idles its rpm is at 750 (lower than usual) and when i accelarate it jumps to 3000 hovers around 2000 then falls too 1000. It also seems that ive been burning more gas latly in shorter trips as well as a louder engine any ideas?

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  • 134 Answers

Check the MAF sensor as well as the O2 sensor. With bad O2 sensor it is possible to have low rpm and loss in fuel economy.

Posted on Apr 25, 2013

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: 2003 mercury sable, not idleing right

I was looking under the hood, and noticed that i could hear air rushing around. I found that a vacum hose had decayed and cracked. After i replaced that, everything has been fine

Posted on Jan 13, 2009

Shadowmaru
  • 33 Answers

SOURCE: 1989 Mercury Sable, 3.0L V-6,

Check your vacuum hoses (They are 3/8" Rubber hosing on the right side of the engine, you will need to remove the air intake piping (Also remove the throttle body to make accessing them easier) This is the #1 cause of high idling in the 3.0 OHV and 3.0 DOHC sable engines.

Posted on Feb 11, 2009

  • 4 Answers

SOURCE: 2000 accord v6 engine idle goes up and down after start up

I am having the same issue after I changed my battery today. Upon doing some research it seems like there is some way of aiding the computer with proper idling. I haven't done it yet... plan on going to the dealership where I got the battery, but from my understanding you disconnect the negative line from the battery for a few mins, reconnect, and then apply gas at 3000 rpm for a few mins until the fan kicks on. AND this will help reset your car to proper idling. Good luck

Posted on Aug 31, 2009

  • 142 Answers

SOURCE: idling to high and engine revs from 1000 to 2000 rpm

lower the idle switch,might have to have mechanic do it if u dont know where it is,wont cost alot,very easy

Posted on Oct 18, 2009

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Go to an Autozone, Advance, or Oreilys parts store for a free scan. There is a good chance that the trouble Code light will identify your problem.

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You has a vacuum leak on the engine.

In order to troubleshoot this, you must start with a clean engine wipe down.


The major offender parts are


air intake gasket on the manifold

air tube after the mass air flow sensor

rubber seal under idle air control IAC motor

===

Warm up the engine for 15-20 minutes (LEAVE THE engine at idle) then spray a little Barmen carburetor clear on the potential air leak location (ONE AT A TIME) and listen for a surge in rpm.

If the engine speed go higher that's mean the carburetor clean (ADDITIONAL FUEL) got into your engine and that's the gasket you need to change.

There may be multiple leaky spots so take your time and check all rubber gaskets,sensor and hose that are lead into the intake manifold.

When you finish fill up with one tank of Chervon to clean out the injectors.

Please post more information after your inspection.

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Mercury had a recall on 3.0 duratech motors in 2000 and 2001. If you get a fuel smell at startup then you might have a bad lower intake gasket, it could cause a miss if seal is cracked. Article No. 01-4-3 you can get it on AllData.

Also, check the PC rubber L piece that runs from the PVC valve to under the throttle control - it could be busted.

Make sure ignition wires are not cracked. If you haven't tuned it up in over 30-40K consider doing that.

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1989 Mercury Sable, 3.0L V-6, Auto Trans. Engine Idles at about 2000 RPM.


Check your vacuum hoses (They are 3/8" Rubber hosing on the right side of the engine, you will need to remove the air intake piping (Also remove the throttle body to make accessing them easier) This is the #1 cause of high idling in the 3.0 OHV and 3.0 DOHC sable engines.

Jan 17, 2009 | 1989 Mercury Sable

3 Answers

2003 mercury sable, not idleing right


Can't say for sure but if you take it to autozone they will diagnose it for free. Mine turned out to be a bad coil pack

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