So here I am thinking its my clutch its my clutch and it might be something else. I'm not worried about the clutch issue because it does need to be replaced so no harm done buying the clutch and rear main seal.

Here's the problem I'm having. I haven't started the car up in almost 2 days. I started it up 5 minutes ago and it was idle just a little over 1k like usually till it starts warming up. Around then my air/fuel mixture was at .800v-.830v (Rich) at start up. Then as the car started to warm up it would idle fine around .500-.700v (stoich) but then drop it lean condition .083-1.35 then back to stoich range. It kept doing this back and fourth evey 5 seconds or so. Everytime it went into lean conditions the car begin to shake like crazy.

What could this possibly be? My check engine light has been on but I check the codes and I have a code 12 "direct power input to the PCM has been disconnected within the last 50 key-on cycles" which is was me disconnecting the battery. The the other code is code 32 "EGR System Failure" which goes on and off and its been there since 2 days after I purchased the car back in April and have had no problems. So those are the only 2 check engine codes I have.

What would cause this too happen? I just put gas in it 2 or so days prior to me thinking its my clutch slipping. I've always put mid-grade from the same gas station as always (BP).

I don't want to drive it now that I know its running lean.
Fuel or spark related? I would think it would throw a code but nothing has come up.

What causes lean conditions? Please help!

Motor has 122k.

Update... I decided to do a few more tests.

Once the car is completely warmed up conditions seem normal... it stays around stoich. As soon as I turn on my AC car begins to shake and drop to lean conditions then come back up to stoich but slowly go to lean conditions again. Car starts to shake like crazy. Whenever its rich or stoich the car doesn't tremble as much.

With the AC off it was going from rich to stoich. Stayed that way for about 2 minutes so when I was about to go ahead and just take it up the road and back it started dropping into lean again. I didn't put it in any gear yet still there sitting in neutral in idle.

Something I noticed before. When I was driving the car everytime I went to shift (clutch down/foot off the gas) it would go into extermely low lean conditions... is this normal? Once I pushed the gas it go back up to stoich then rich.

Trying to see what anyone's take on this. I do have spare injectors but before I even go that far into it I want to see if there's any other possible causes. Just find this strange. Car was running fine for months till now.

I have replaced the spark plugs a few months ago... wasn't that long ago. I've had the car since April of this year. Did not replace the wires though. I'll get up tomorrow and pull the plugs to see if I find anything strange.

I'm hoping its nothing major. Any help would be appreciated.

That AF voltage is *supposed* to cycle lean-rich-lean-rich. When it *doesn't* then there is something wrong.

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