98 chevy pu miss
new to this forum, hoping somebody can help. here goes.
I have a 98 chevy 2500 pu. w/ about 150,000 miles on a 5.7vortek.
started feelin a miss bout a week ago. changed plugs & wires. no help. A friend has a snap on diagnostic unit. showed misses on cyl. 4 & 8. but no other problems except some o2sensor activity. low activity i think it was, also the check engine lite is NOT on.
when im stopped at a light, it feels like it wants to surge forward. in neutral u can really feel the misses bad. when im driving i also feel it surging, or cutting out, and it has no get up and go.
my question i guess is, what else can make it miss like this. thinkin fuel injectors.but the snap on unit said they were ok. please help.