So I'm pulling a lean, misfire code, idling rough, garbage mpg (best right now is 17 on a long highway trip.) Not loosing power or any crusising preformance.
I checked all my vacuum hoses and my and terminals are clean. I check the battery on and off and it'* at 13.7V.
When I unplug my MAF it idles much smoother. I changed the MAF and there is no change in the rough idle. I'm getting 14V at the MAF positive and 5.0V at the MAF Signal.
Sometimes at idle the V'* drop off when I'm sitting at a light.
What else should I be looking for? Thanks

Look around for a vacuum leak. Around injectors, gaskets, etc.

I had that problem last summer, too. I replaced the fuel filter and all was well. (Of course, I twisted the fuel line during the repair, but I know you're smart enough to not do that.)

Could also be some bad gas. On the way to the auto parts store for a filter, stop for a fill-up and see if that helps any.

Just an update. With a nice warm day I went to work. Changed the fuel filter with a nice WIX. cleaned my battery terminals hardcore. Here'* where the tricky part came in. Changed my injectors that I had cleaned and new O-rings. Put everything back together, no dice. I guess the injectors weren't ment for my car. I'm guessing maybe an 00+ L36. Put the original ones back in and she purrs like a lion. No lean code and smooth idle. Can't wait to take her for a spin.
Thanks for all your help again.

Ahh, different injectors. Ya, if the new injectors are a different size, then they will flow at a different rate then the PCM expects.

I do have a write up coming though.

Very good, let me know when it'* done.