1998 GMC Envoy rough idle after schanging fuel pump

1998 GMC ENVOY
98,157 MILES • 6 CYL • 4WD • AUTOMATIC
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HUMANAFTERALL
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my fuel pump went out a week ago, soi took it in to get replaced. after getting it back i noticed there was a little drop in idle speed when stopped. it has gotten a liitle worse since then. i never had any problem before this. i cleaned the injectors, no results. any ideas
Mar 28, 2008 at 9:03 AM
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LEGITIMATE007
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http://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm

go here to check your fuel pressure
Mar 29, 2008 at 10:10 AM