Question about 1997 Ford Taurus
Check for spark in cylinders 1 and 4 if none, replace coil pack. If spark is present replace spark plugs in cylinder 1 and 4
Posted on Aug 02, 2013
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Posted on Jan 02, 2017
It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.
Posted on Feb 05, 2009
Assuming the plugs and wires have been changed. I would look at the bottom of the coil pack. They tend to crack and short out.
Or if it's got coil packs they will also crack and short out.
Posted on Jul 26, 2008
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Posted on May 21, 2009
Did you check the condition of the spark plug? If the plug is good do a compression check; a very low reading could indicate a sticking intake valve (sticking open). The easyest and cheapest way to fix a sticking valve is to introduce 1/2 can of Sea Foam into the air intake manafold; just follow the instructions on the can except you will use 1/2 can instead of 1/3 can. That Yamaha motor from what I have found collects tons of gunk on the valve stems. Good luck.
Posted on Feb 19, 2010
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