stumbling around and worse as it gets hotter here in Phoenix

[gmhowe]

96 LT1 CE, rarely gives me issues but lately has started stumbling and have to give it more gas to stop it but as it gets hotter here in Phoenix ( today its 112 ) stumbles more at low speeds and high speeds. I have a new fuel filter and plugs but just to damn hot to work on it. 85 is in the garage awaiting me to put in AC compressor but again its too damn hot.
any other things I should check out on my 96 ?
Thanx in advance again
Gordon

 

[GWinter]

No code ? I would check temp sensor and TPS

 

[gmhowe]

Once again the simplest of things, found 2 vacuum lines that were totally brittle and turned to dust when I touched them, replaced them and all better now. But will change the fuel filter anyway, not sure if I will attempt to change the plugs since looking at the 96 there is a lot more crap around where the plugs are..And I thought changing plugs on my 85 was a PITA, and no codes GWinter, but thanx for the advice
Gordon