Hello, Im new here and just picked up an 04 RX8 with 73k miles on it. She was starting a little rough so I replaced the spark plugs and when that didnt help, I replaced the battery.

After I replaced the battery today it started fine, but doesn't want to hold an idle RPM speed and just dies. If I give it some gas it is fine, but when I let off, no idle. Very annoying driving in traffic today.

I have done a search and have cleaned the maf, done the 20 brake pedal press, but nothing seems to work. Any ideas?

 

I would go ahead and change the coils and leads if you don't knw when they were last changed. You may have to go through a few drive cycles before the computer relearns how to idle the engine. The 20 stomps on the brake pedal usually does the trick, that's why I suggested the coils and wires.

Read this: https://www.rx8club.com/new-member-f...t-here-202454/

 

Check the catalytic for clogging too...just in case