I just did a tune up on my 3.4(plugs, wires, air filter, and pcv valve). I am still having issues with it not having any power over 3500 rpm. I bought a new fuel filter also but did not instal it yet. Is that my problem or do they have any other problem that is commen?

 

No lights at all!!!

 

its your egr mines in the shop for the same reason if it isnt that is a vaccum line but mine also had coils that were corroded