I have a 92' Cherokee w/ 4.0 and a AX-15 5 speed with somewhere in the neiborhood of 170K on the odo that's started to give me problems as of late. First off it starts really rough after it's been sitting a while (more the about 12 hrs.) and when it does start it sounds like it's only hitting on 5 for 30 seconds or so but then it smooths out and runs great. The other thing is a very gassy smell coming out the tail pipe...like it's running REALLY rich. I haven't noticed a huge drop in fuel ecconomy though. The #4 plug is ashed and I'm thinking the smell from the back is most likely coming down from that one. So that's got me thinking a bad fuel injector, but I was also wondering what, if any, of the emmisions control sensors might be causing it. Any help or experences would be greatly apperciated.
Patrick
Patrick