2006 P71 hesitation??

Recently picked up an 06 P71 w/ 90500 miles. I just noticed a hesitation around 50-55 today that I hadn't felt previously. I have not had a chance to look at it just yet. I was just wondering if this is a common issue with these panthers or if anybody could help steer me in the right direction. Thanks in advance!

Any MIL codes showing up?...if so pull them 1st.

Have you done the easy things...Air-Fuel filters?

Check the spark plug wires...pushed down tight?

Then get into the Alum. Throttle Body...
I had to clean mine when replacing the Throtte Position Sensor (TPS)
Later My research lead me to bottom half of the Alum Throttle Body...
There is a "C" channel down there...commonly full of carbon...Packed
from Milage/usage....clogs the ventilation VCP

The engine will run ruff...if there is significant CARBON build up...

My two cents worth.

Hope this helps...

Wizzard1222 got it right.
Some people will delete MIL codes just before getting rid of a car because they couldn't fix the problem. I had one car where someone went through the trouble to pull the light so it looked like there were no codes. Check to see if any codes were left in. If you don't have a scanner, AutoZone, Advanced Auto, O'Reilly are some of the national chains that will do a scan for free.
The carbon buildup is normal, but can get excessive at times; cheap gas, poor blends.

You may want to go to www.crownvic.net for a lot more information.

I recently had the same problem from 40-60 mph. The "check engine" light came on shortly thereafter and revealed a bad electrical component over the spark plug (in my case #5). Have the code checked, good luck!

With 90K on the car, I would change the spark plugs first, providing you have no codes. The platinum plugs do not last to 100K! I had 2 cases where the plugs were worn out at 85K. Use Motor Craft spark plugs. Make sure you change them when the engine is stone cold and blow away the debris with compressed air. The job is not too bad, about 2 hours. Good luck.

Sooooooo, what was the fix???

You can also, examine the boots too. I have had a strong firing coil; however, the boot was faulty. Please by an HEI Ignition tester. They sell them for around $5-$6 at Advance, Oreilly, or Napa. Likewise, you can replace the fuel filter. You may find sediment in it, thus causing the stumbling.

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?????? I missed that phrase.....?????

Is that a new dialect from Ky....????

Quote:

With 90K on the car, I would change the spark plugs first, providing you have no codes. The platinum plugs do not last to 100K! I had 2 cases where the plugs were worn out at 85K. Use Motor Craft spark plugs. Make sure you change them when the engine is stone cold and blow away the debris with compressed air. The job is not too bad, about 2 hours. Good luck.

+1 - note, you plugs only have 4 threads and if ya strip one of the 8 then you are spending 900 bucks at the dealership IMO

Some more plug tips:

Make SURE you do it on a cool engine

Blow spark plug holes out with compressed air.

Use a spark plug socket. It has a rubber insert that holds the plug in place as well as prevents you from breaking it.

If it feels like it's gonna break, don't force it. Soak it with kerosene and let it sit for a couple of hours then try again.

If it's not turning easily, don't force it. Work it back and forth until it's finally out. If you force it out you could strip the threads.

If the plugs have never been changed, you should not have a problem. Most of the issues with plug blow-out are caused by a prior improper installation...either they were cross-threaded, overtightened, or not tightened enough. Factory manual specs 11 ft/lbs. Do the job with the engine COLD, use a torque wrench on install, and if you do use anti-seize, use VERY little and back off the torque spec by 10%.

I had something like this happen to my 2003. My spark plug blew out of the socket and stripped the threads. I had to re-thread and place a helicoil in there for the plug to fit again, if this is the case, make sure you dont get any metal shavings in the engine, more problems to come if you do. I then had to replace one of the pigtail connectors going to the coil cap as it was stretched and damaged, caused hard idling issues until i did. I then went ahead and replaced all the plugs, boots, and caps. Total cost for all this, $400-$450, though i did this out of my choice to make sure it was all working properly, you dont have to do this unless you want to or need to. Definitely check for carbon build up as mentioned, can also cause performance issues.