Hello I am new to the forum and could really use some help. I have a 94 Mazda B3000 Automatic with 180,000 miles. Recently had a problem with error code 327 and fixed that with a new EGR sensor. Code went away but the truck idles very rough and gets 13 mpg. No new codes have been thrown. Also it smoothes out a bit when driving until I get into overdrive and the RPM goes below 2000 and it gets worse. I cleaned the EGR valve and checked that it is opening at about 9 to 10 psi. Today I cleaned the MAP but still no change. Can anybody shed some light or point me in a direction? I would appreciate any help you can give.