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I just got all my coil packs replaced and now when at normal temp when i come to a stop it idles under 500 and sumtimez shuts off if i sit for a little bit it comes back up over 500 wats the deal????

Maybe you left an air hose disconnected or lose? Or any other connector?
I guess you already check the coils if they are well connected. If one is failing, you can also unplug one at the time to see if you find the one bad.

Assuming the battery was disconnected for the install, did you go through the re-teach procedure for the computter?

Quote:

Originally Posted by gone postal

Assuming the battery was disconnected for the install, did you go through the re-teach procedure for the computter?

Idk if the battery was disconnected but what is the procedure to reteach it to idle correctly??

It's in the owner's manual, if you don't have it, Bucko has posted a link to an online manual in a couple of threads.

Here is what my 2005 owners manual states about this:

Because your vehicle’s engine is also electronically controlled by a
computer, some control conditions are maintained by power from the
battery. When the battery is disconnected or a new battery is installed,
the engine must relearn its idle and fuel trim strategy for optimum
driveability and performance. To begin this process:
1. With the vehicle at a complete stop, set the parking brake.
2. Put the gearshift in P (Park) (automatic transmission) or the neutral
position (manual transmission), turn off all accessories and start the
engine.
3. Run the engine until it reaches normal operating temperature.
4. Allow the engine to idle for at least one minute.
5. Turn the A/C on and allow the engine to idle for at least one minute.
6. Drive the vehicle to complete the relearning process.

•

The vehicle may need to be driven 10 miles (16 km) or more to
relearn the idle and fuel trim strategy.

Go here for a PDF copy of an owners manual:

https://www.fleet.ford.com/maintenan...ls/default.asp

Quote:

Originally Posted by Bucko

Here is what my 2005 owners manual states about this:

Because your vehicle's engine is also electronically controlled by a
computer, some control conditions are maintained by power from the
battery. When the battery is disconnected or a new battery is installed,
the engine must relearn its idle and fuel trim strategy for optimum
driveability and performance. To begin this process:
1. With the vehicle at a complete stop, set the parking brake.
2. Put the gearshift in P (Park) (automatic transmission) or the neutral
position (manual transmission), turn off all accessories and start the
engine.
3. Run the engine until it reaches normal operating temperature.
4. Allow the engine to idle for at least one minute.
5. Turn the A/C on and allow the engine to idle for at least one minute.
6. Drive the vehicle to complete the relearning process.
o The vehicle may need to be driven 10 miles (16 km) or more to
relearn the idle and fuel trim strategy.

Go here for a PDF copy of an owners manual:

https://www.fleet.ford.com/maintenan...ls/default.asp

I put a stock air intake on tonite and that helped a little I will try this procedure tomorrow.

Put di-electric grease on the COP boots if you haven't done so already. You can lose some spark going to the plugs if you don't use it.