2004 Freestar 4.2L codes missing badly

My Freestar that ran like a dream the last several years. It suddenly started missing badly and engine light came on.
Codes -
p303- ignition plugs wires coil/ vacuum leak/ injector/fuel pressure

p0401- egr and all sensors

p0316 crank sensor an wheel

Ended up replacing plugs, wires, and coil. Back to Running A-1 again.


Rear plugs were a little challenging. Must remove the wipers, and cowels to access and feel your way to the plugs in a very tight area between engine and firewall. Would of been a little easier if it was warmer than 20 degrees outside. But not as tough as it looks. Took about 3 hrs total.:)

I give you an A+ for working in the cold weather. Funny how the cold weather brings out the worst in engines. Now don't forget to have the battery tested also when you get time.
Just out of curiosity, how many miles since the plugs and wires were changed?

The plugs in the rear might be easier toget to from underneath the Van.

I give you an A+ for working in the cold weather. Funny how the cold weather brings out the worst in engines. Now don't forget to have the battery tested also when you get time.
Just out of curiosity, how many miles since the plugs and wires were changed?

My van has 94k on it. This was the first time for new plugs and wires.

The plugs in the rear might be easier toget to from underneath the Van.

Have you done it this way before??

I have to change my plugs in my '04 as its been about 40,000Kms. I of course want to get it done the easiest way so thats why I'm asking :grinno:

Have you done it this way before??

I have to change my plugs in my '04 as its been about 40,000Kms. I of course want to get it done the easiest way so thats why I'm asking :grinno:


The Spark Plugs have easier access under the Wiper Cowl from the top.

There is also a tsb on pcm water prevention modifying the cowl replacement