Is check engine light on?
Check fuel pressure
check for codes if any
check timing
check exhaust back pressure (checking if catalytic converter clogged )
if all good
disconnect the O2 sensors and give it a try drive around and if you all better replace O2 sensor
DO NOT use a universal O2 on your truck it will not work correct
good luck and let me know
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Wednesday, November 19th, 2008 AT 4:53 PM