Hey all, I have a 91 cherokee 4.0. It ran fine yesterday but today when I went to start it sped up smoothly to 2000rpm then started to stumble and fart its way down til it died. I tried to baby it to keep it running but that makes no difference. Sometimes it would hang on (farting and sputtering) at about 2 or 300rpm for a few seconds then die. I don't know what happened over night but a gremlin moved in. Any thoughts? I dumped some sea foam in the tank a couple of weeks ago maybe it shook some stuff loose and got into the fuel pump. I DID already change the fuel filter also along with plugs and wires.