98 contour barly runnning
 

have a 98 contour the other day drove it fine then i stoped and the darn thing stalled would run but barly only if i floored it acting as though it has a missfire i checked all spark plugs good to go changed fuel filter and did samething. checked the fuel pressure it was 28 pounds. so put a new pump and sock started it up it ran better but when i floored it it would bog out and die and it would only idal for a few seconds.if i played with the peddle a little it would run fine but floor it it would bog out. does it soud like the timing belt might of jumped to anyone reading this?