2002 Vulcan - P0174, low power - Page 2 - Taurus Car Club of America : Ford Taurus Forum
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post #11 of 13 (permalink) Old 01-22-2019, 10:59 AM
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Also, I didn't see any mention of fuel injectors above.

Have you checked these to make sure that they are all working?

A clogged injector might be responsible for this, too.

I'm that guy. Don't be that guy.
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post #12 of 13 (permalink) Old 01-22-2019, 11:01 AM Thread Starter
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Originally Posted by Jim Beckett View Post
Also, I didn't see any mention of fuel injectors above.

Have you checked these to make sure that they are all working?

A clogged injector might be responsible for this, too.
I've done the "use a screwdriver as a stethoscope and check for clicking" shorthand test, but nothing more involved than that.
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post #13 of 13 (permalink) Old 01-22-2019, 11:35 AM
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If I were in your shoes, I would attack the problem like this:

Do a compression test on the bank 2 cylinders, and check the spark plugs, wires and coil to make sure they are performing as expected, and not arcing/grounding out, or having any carbon tracking issues.

If you find a cylinder that is significantly lower on compression, then the next step is to perform a leak down test to determine where the compression is going. This will determine whether you have a tough repair ahead, or a relatively easy one.

If the compression on all of the cylinders seems reasonable and you didn't find any issues with the spark, then that leaves fuel and air.

At this point, I'd pull the upper intake manifold and carefully test the fuel injectors.
(Unplug the coil, and remove any other potential ignition sources, to make sure you don't set yourself on fire!)

Inspect the UIM carefully making sure that there are no holes or cracks in it, and then reinstall it using new gaskets and seals.

If you made it this far, I would hope that you would have found and corrected your problem. I can't think of anything else that would manifest itself as you have described.

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