So... I have had an intermitten problem with my idle for about 4-5 months now. I idle problem start around october or november when my front o2 sensor went bad. I was having a really bad chuging during idle and when I went to take off I had to baby the gas to get any power at all, if I pressed the gas too much it would just sit there and not do anything. I replaced the o2 sensor and this problme cleared up, but I was left with another problem. My car seems to want to die every 10-15 seconds maybe. It idles around 800rpms consitantly but every so often the idles will drop down to about 500 or 600 for a second and almost die, and then jump back up to about 1200 or 1300. It's never actually died and when I take off of drive its fine. I have been throwing a code lately, I believe its the P0700 that might not be the right code but the code description in auto tap says fuel system too lean. I am pretty sure that I dont have a vacuum leak, one because my vacuum gauge is exactly as it has been for the past 3 years, and two because I have sprayed all over the vacuum lines with carb cleaner and havnt gotten any idle surge at all. I've tried the ground wire upgrade, the extra + from the alt to the fuse box, replaced the fuel filter used injector cleaner several times and I just cant seem to figure out what the deal is. When the code comes on its only on for a little bit, maybe two separate drive sessions and then it goes off again, thats why it frustrates me so much. Any ideas would be much appreciated. I had a friend suggest the fuel pump relay and the fuel pump spd cont relat in the engine fuse box as possible problem causers and am replacing both of those tonight. Let me know what you think guys, I am at a loss