hey my tailpipe keep shooting out black soot. It has no converter install its just has a muffler. im having other problems but looking at this while im down I got another link to to my main problem here

https://www.cherokeeforum.com/f2/95-...1/#post2947882

 

Easy enough to check the MAP tube;

There is a brittle little tube. It comes out of a rubber plug, low on the engine side of the throttle body. It runs back to the firewall, then up to your MAP sensor sort of high up there near center on the firewall. CRUCIAL!! The MAP will tell the ECU to dump fuel with less/no vacuum. Any crack or blockage and it will be pig-rich. (black smoke, fouled black plugs).

 

I changed the MAP sensor because it gave me a 14* on the CEL (1 click pause then 4) is there something i have to do to restore my jeep so it will start