missing when stopped in gear. on 1991 Chevrolet 1500 Pickup

missing happens when stopped but does not die, but runs just fine otherwise. I have replaced the EGR valve, o2 sensor, fuel pump/filter, oil sending unit. What else can I try?

by in Sachse, TX on April 15, 2009
2 answers
ANSWER by on April 16, 2009
STOP TRYING PARTS before you go broke and your truck is still not fixed. Have your vehicle diagnosed!
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ANSWER by on September 16, 2009
you might have a bad iac valve or a bad egr silinoide
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