01' Crown Vic EGR valve cleaning (how to)
Here's a $$ saving FYI for all you backyard mechanics. I had a "CHECK ENGINE" and was told it meant my EGR valve was stuck. I was also told it might be possible to clean it good versus replacing it. After researching it on the web, I found it was a job I could probably do. The valve was replaced about 3 years ago so I was hoping to save some $$ and here's what I did and what you'll need:
A new EGR valve gasket ($2) or if your feeling lucky just re-use the old one.
1/4" drive socket extension to remove the engine cover.
WD-40 or Liquid Wrench sprayed on the 2 bolts and manifold to valve nut (wait 10 mins or more)
1/2" socket to disconnect the negative/ground battery cable. This will also reset the check engine light.
Unplug the vacuum hose. A small socket to loosen and move (not remove) bracket over the manifold nut. It may be a 3/8" socket.
1-1/16" open end wrench to loosen the manifold nut. Loosen the manifold nut
10mm socket to loosen the 2 bolts.
Loosen the manifold nut completely and remove 2 bolts.
Spray valve and manifold liberally with carb/choke cleaner. Use a battery terminal type wire brush to clean inside the valve and manifold. Spray, scrub rinse and repeat until clean. I didn't have a wire brush so I used a rag wrapped around a 1/4" extension. I found the manifold to be extremely dirty so this took a while. I sprayed a bit of WD40 inside the valve and then turned it upside down to drain excess and sprayed the threads on the bolts and nut.
Finger tighten the 2 bolts, leave loose. Finger tighten the manifold nut as much as you can. Evenly tighten the 2 bolts then the nut. Replace/secure the bracket and vacuum hose, battery terminal. Start engine and let idle. Does it idle smoothly? Does the check engine light stay off?
I also read where cleaning the valve may also improve air emission readings. Hope this helps someone else save $$, good luck!