99 SVT 2.5L with 99k miles.
I just had my car in to check the CEL and it returned 4 codes. I don't have them handy but I will go to AutoZone today after work and get all the exact codes involved and plug them into this thread. I did have my CEL on for about 4 months now. When it originally came on, Ford told me I needed all my cats replaced which would have been around $2,000+. I said the heck with that. Recently, I remember one of the codes stating that the EGR flow was excessive.
Here's what I've done so far. Took the car to a muffler shop.. they did a temperature test on different parts of the exhaust. One area was close to 450 degrees. They guess that I a clog was around that vicinity. It was just after the cat closest to the firewall and before the main cat.
I obviously need to post more information here as to what the codes are. Will the EGR being clogged cause a rough idle? Sometimes the idle will bounce when I come to a stop and it will even stall the engine. I'm going to clean the EGR today when I get home. I found pics on
HOW TO w/Pics thread and it looks easy enough. I have already cleaned the throttle body for a sticky gas pedal but I never removed the gasket to expose the EGR chambers. Since it's free, I figured what the heck.
Now if this doesn't fix the rough idle then I'll be looking into the most cost efficient way to unclog or replace the cat.
