I have a 2000 Grand Cherokee. Recently I got codes P201-P208(all 8), P121 and P108. I noticed it misses, and sometimes dies. Once before it acted like that I put dry gas in and it seemed to fix it. I ran two bottles of dry gas thru, but it still acts up. Any idea of a common issue that might cause all these codes?

 

This Jeep is giving me plenty of mechanical experience. I changed the front end twice, four wheel drive works, but the noise was so bad in the front, that I took the front drive shaft out for the summer. I have to pull apart the differential and see what the noise is about. Now I'm getting all these codes.

 

Erase codes then drive again then recheck codes and repost.

 

I cleared out the codes, and still have evap incomplete, but the only active code is P108, MAP sensor. I have a vacuum gauge and a voltmeter, so I'll see what I can find.