o6 trailblazer it is missing and cutting out at idle,i can hit the highway 50-80 it runs great never cuts out or misses.come to a stop and it may or may not do it again.it starts fine and can drive it but it is matter of when is it going to do it again? it isn't throwing a code.it has 88,000 on it.i need a little help Please!!!!!!!!!!

 

update: i can unplug the variable timing solenoid (that i have changed) and the camshaft positioning sensor and it doesn't change the idle when it is idling right .i think it should die but it doesn't it doesnt even cause a light to come on nor does it throw a code. i know it's not a fuel issue cause i ran it out and filled with 100% gas no ETHANOL. i'm thinking it's the
engine control module. now the radio has gone crazy it doesn't want shut off.

 

it is missfiring on 2,3,and 4 a friend of mine thinks it is the intake manifold because its plastic and he thinks it may have a crack in it . has anyone else had a problem with an intake?

 

well i may have fixed it! #4 plug well had water in it coil boot had water on it and in it the plug was severely rusted.i put all new plugs in it took shop vac to all plug holes.swapped all coils around so i could check and see if i still had a misfire and if it would be on the #4 coil that i put on #1. i then cleaned the throttle plate,put it all back together filled it with fuel added some sea foam and it the road it has been three days and still no misfire. im glad i left that intake alone.