So my car was running normal last night, the CEL came on while I was sitting in my car at home and I didn't check it until today. I was driving and the car runs horrible, it stutters when I try to accelerate, it lopes horrible while I'm stopped and when I go you can still feel the stutter.

Well ECU codes were, 5-3 Right Bank 02 sensor,
8-6 Evap canister purge valve/selnoid valve
6-4 Cyl. 5 Misfire,
7-6 Undefined

Anyone know what 7-6 really means? ANyone took theirs to a dealer or something? I checked the stickys but it skips from 7-5 to 7-7 with no mention of 7-6.

Oh and I was driving earlier today and the CEL was flashing, while I was driving, it wasn't doing any kind of pattern like a code it was just steady flashing. Whats that all about?

0706 fuel injection system system lean or rich (right bank)

You might have a bad fuel injector in cylinder #5. Replace that and clear the codes and see what, if any come back.

Hey thanks, SICK MAX!!!

Anyone have any idea why the CEL would just start flashing while I'm driving?

Blinking CEL (as you saw) indicates a "severe" failure has been detected by the ECU - as in continuing to drive could cause damage to your engine. (if I remember correctly).

also a misfire issue causes a bllnking cel if im not mistaken....at least it was like that on my g/f's altima

On a related note, I just changed my spark plugs- NGK copper V-Power, torqued em properly, had no problems at all during the process. Now, my CEL is flashing randomly while I drive too. Checking the codes reveals nothing- just 5 long and 5 short, indicating no probs. What the hell? The car runs smooth, just as it did before I changed the plugs. (wasn't able to start a new thread).