I am having a similar problem. Truck idles just fine. Take it up the road, and as you apply the gas it hesitates. I have tore it down to the injectors, thinking they were junked up.
I am at a loss with mine as well. I get a code fuel to lean. I have changed the O2, may have wasted my $$$.
I am going to check the TPS and spray some cleaner on my lower air intake. I dont know what else to look for. I already cleaned the MAF.