94 cougar xr7 with 4.7 running problems

Hi all

I just bought this car about a month ago the guy that owned it was driving it and it devopled a stumbling problem so he parked it. It has been setting for 3 years so I bought it for $100. it does have a stumbling problem if you step on it medium to hard but if u take it easy it is ok. then about a week ago i ran it low on gas just made it to the gas station put gas in and now every once in a while and getting more ferquent when u step on it it gets to about 2500 to 3000 and real bogs out and it will not pick up speed you let up and try again it might be fine or if u shut the car off then it might be ok or it might not be. the check enging light is on need to get codes out but i have been through school for auto repaire and have worked in the feild for 10 years. but this doent act like a computer problem becouse it does it one time then not the next :banghead:

update. I just replace the fuel pump sock and the fuel filter and replace all the plugs cleared the computer out and no service engine light on. but it still will not get over 2500 rpms and it loops and tack drops 2 arounf 1000 rpms and no trouble codes have came up yet. put in 10 gallons of good fresh gas also but still doing it please help

Jim

found the problem the upper radaitor hose was rubing on the wires for the right coil pack and was shorting it out