i have an 89 4.0. my injectors started leaking so i replaced them. after replacement my jeep was running to rich so i double checked fuel pressure and it was good (31psi-39 psi) so i ordered more replacement injectors and it is still loading up. any suggestions?

 

You better make sure all your vacuum hoses are hooked up. Also check the o2 sensor and egr valve. Your 4.0 shoulnt load up being computer controlled.

 

how are your plugs and wire..dist cap and rotor?

 

I have a fuel prob also my jeep ran great and i put that stupid GUMOUT stuff in my tank and now it runs like crap

 

how mant tanks have you ran thru it since?

 

probably 1.5 full tanks of pure gasoline. no ethanol

 

all are brand new

 

vacs are all good. o2 is brand new. wires plugs rotor < and dist are all brand new also. havnt tried egr.