hey guys my 91 xj 4.0 is flooding itself out. if it is dead cold it will fire right up but if u let it run a few mins and cut it off it will most likely not start back up and man u can smell the gas if u unplug the fuel pump relay it will crank and run real rich for a minute smokin like crazy then plug the relay back in and it will stay running but not good. before you ask yes i have changed the maf sensor and done a full tuneup fuel filter, plugs, wires, rotor button, distributor cap etc. Any ideas would be greatly appreciated

 

Check the TPS sensor and Idel air controler. Also check the condition of the fuel pump resistor on the front lh panel.

 

10-4 thanks

 

did this end up working very well

 

That was 11 years ago.

I would suspect it's most likely a split hose from the intake manifold to the MAP sensor.