California smog analysis, ask a smog tech

[claych]

The above has been around for a long time ,posting here to help Folks understand 5 gas interaction.
Looking at the 2 V.I.R's & the mentioned severe stumble...
Have You replaced the fuel filter? I would also perform
fuel pressure and leakdown tests.
Granted, the injectors could be suffering from poor spray pattern
and solenoid wear, but hey simple (cheap) stuff first !!

[mightymaximus]

Have You replaced the fuel filter? I would also perform
fuel pressure and leakdown tests.
Granted, the injectors could be suffering from poor spray pattern
and solenoid wear, but hey simple (cheap) stuff first !!

I did replace the fuel filter a few years ago, as well as drop the fuel tank to check out fuel pump. The tank was super clean.

I will have to get the tools to perform a leakdown, and fuel pressure test.
It seems a lot of the mechanics in SD, don't want to touch my truck as they can't see high dollar repairs coming from me.

If I was back in Nevada, I could just ask any number of friends, and take my time fixing it. Here in CA, it feels like the green police are hiding behind every corner to penalize those who don't replace their older vehicle for a Pruis.
Thanks again for the suggestions.