Does anyone have any info. on the fuel system on a 7FGU25 serial 79508? It idles rough and cuts out when you give it the gas and then comes out of it if you hold the gas pedal all the way down. Smells rich at idle. unable to adjust the carb. enough to get a good idle. Is there a map sensor on this engine, looks like maybe one mounted by the carb.? Thanks. Keep those trucks a rollin. s.tjones at yahoo dot com