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2005 sable: dohc..leak..sputtering..my mechanic cant seem to figure…

Customer Question
So I have a 2005...
So I have a 2005 sable 3.0 DOHC with 50k miles. I just had the AC unit checked and recharged after a sudden leak. Now the engine is "hickupping" or "sputtering" and my mechanic can't seem to figure out what the problem is. Any advice would be appreciated.
Submitted: 8 years ago.Category: Mercury
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Answered in 15 minutes by:
6/15/2010
Mercury Mechanic: Amedee, Mercury Technician replied 8 years ago
Amedee
Amedee, Mercury Technician
Category: Mercury
Satisfied Customers: 28,313
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Verified

Hello there!

 

When was the last time the engine was tuned up? No, not just plugs, but a full tune up! The whole nine yards! Any part of the secondary ignition will do this including the ignition coil or coils! This sounds like a classic ignition misfire! They usually go bad under a load like under acceleration, but can be noticeable at any time. It is very important to have your engine equipped with good tune up parts or you may be causing damage to other components of you car like the catalytic converter which can be expensive!

 

Possible causes:

 

Ignition misfire causes by any bad tune up part and or ignition coil or coils.
Bad spark plugs, spark plug wires and cap and rotor (if equipped)
Wrong tune up parts spark plug, wires etc...

 

The quickest way to check the ignition components, is by looking closely for leaking secondary voltage. Visual look at all the tune up parts to see if you can see any sparks coming from any of the wires or coil (or coils) when the vehicle is running. If not, you can put your hand on the coil/coils and wires when the engine is running and see if you feel any small voltage leaking form the tune up parts.

 

It will leak secondary ignition voltage from the tune up parts caused by high resistance from carbon tracking if they are bad. This is very common if the tune up parts are not changed regularly!

 

If any is found, the tune up parts are simply bad and will need to be replaced! If none is found than you can spray a mist of water on the tune up parts when the engine is running and see if that causes the engine to stumble or run rough at all. Again, if it does, the tune up parts are bad and will need to be replaced!

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Customer reply replied 8 years ago
The car has never been tuned. I bought it with 17k miles on it and according to the manual the plugs should be good for 90k miles. This issue occurred only after the ac system was checked for leaks and recharged.
Mercury Mechanic: Amedee, Mercury Technician replied 8 years ago

Maybe it is just a coincidence? Maybe he accidentally bumped the tune up parts while he was in there?

 

I will leave this question open.

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Mercury Mechanic: Thomas, Mercury Technician replied 8 years ago
Thomas
Thomas, Mercury Technician
Category: Mercury
Satisfied Customers: 1,543
Experience: Auto mechanic with 15 years exp. and Ford certified
Verified
Hi, my name is XXXXX XXXXX your mechanic check for diagnostic trouble code?

Edited by Thomas on 6/16/2010 at 12:14 PM EST
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