help, need code assistance

[misterKTM]

Something is definately aria...idle is very rough, and bad cut-out stumble if engine is lugged below 1300 rpm. Weird thing is it runs/pulls good right up to 5500 rpm. Is there a way to get fault codes to display on the speedo ? Or do I need to get a code reader ? Where does the code reader plug in at ? Any suggestions on a good one ? Thanks for any help.

Rob

 

[misterKTM]

one other sympton I should throw out..I've heard some pinging in association with the low rmp lug stumble and cut out.

 

[JonM]

http://www.c4vettes.com/ecm.htm

 

[misterKTM]

Wow - Thanks Jon. Spot on, exactly what I was looking for. I'll check things out tonight and hopefully get a starting point to check connections and sensors etc. Dang, that is good stuff. Thanks a bunch!!!