Engine runs bad after head gasket change *info. added?

*I have a 92 Ford Taurus V6 3.8 with around 55-60,000 miles.* I replaced my water pump, thermostat, head gasket and all the other gaskets, torqued everything that needed to be, did the oil/filter change, and flushed out the radiator. I cannot figure out why the car is running bad. I can get it started and when I test drove it, as I took a turn the car died. It seemed like every couple blocks I would drive it would die. It sounds like there is a vacuum leak, I have tried the soap and water but I didn't see anything on the lines. Please help, also, could the fuel filter be part of the culprit? My guess is either the EGR system, vacuum leak, or fuel filter, any other suggestions? Thanks.Engine runs bad after head gasket change *info. added?fuel.filter/fuel.pump
Engine runs bad after head gasket change *info. added?
if you have adjustable tappets make sure that you have not overtightened any.

otherwise, recheck every connection that you disturbed

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