So My 88 cherokee 4.0 has been leaking out of the back injector. I replaced all the o-rings today and now the jeep is running worse than ever! It is barly running, back smoke is coing out the tail pipe, and it back fiered. It is not leaking fuel any more and I used dielect grease when I put it all together. Any Ideas....?

 

You pulled the vacuum line off the map sensor.

 

I looked at it and I see the vacum line still connected to the map sensor but, There is a line that is un-connected and it looks like it should feed into the throttel body. Is that the same line?

 

Yes indeed it is. Plug it in and I'll bet it runs good

 

Man how easy was that! Thank you so much!!!! I feel like such an idot, but I glad it runs. Thanks!

 

Your not the first I helped thru the same problem lol

 

Its commonly overlooked, I know I did when I did a head gasket for someone lol

 

LOL. I am sure I will do something like this again. Glad to know I am not the first.