rough idle, please help

[skipr]

Did a complete tune up (new OEM wires, ac delco platinum plugs, dist. cap/rotor,) I have not cleaned MAF or IAC. thats what caught my attention in your post. My symtoms are the same but the P0305 is very specific to a misfire in #5. I thought it was clogged poppet, there is a TSB out extending warranty to 10 years, 200,000 miles on the injectors.But the dealer refuses to even consider that being a cause.They claim to have tested for that, but they can't seem to remember how they tested or the procedure taken to rule out fuel system.

[Fireplug]

Let it idle for about 30 min and the turn it off and pull cly 5 plug what does it look like???

[skipr]

Originally Posted by Fireplug

Let it idle for about 30 min and the turn it off and pull cly 5 plug what does it look like???

Idle for a half hour? That plug is gonna be a hot MF. I'll try it, thanks

[GMCMudBogger]

Same prob here, Truck runs real good otherwise, get to stoplight and will idle fine then stumble and stall, sometimes before it stalls will surge to try at keep it alive but will die, idles fine in park or neutral, but I dont like put in neutral or park at light since will die when loaded upin gear, Sucks huh!