Fuel problim

[Guest]

i can smell gass st times and it is running verry bad missing, and stumbles alot, no power at all

how do i check the injectors?

what else can i check

[Guest]

check the ignition system first to be sure it is up to snuff--wires, plugs, coil packs and module, then look at the fuel pressure regulator--they commonly fail and it sucks fuel into the air filter housing.