Running ruff my van is running lean and when iput the ac on it runs really ruff

O2 sensor

check the exhaut may be plugged

Of coarse

Any Evap System code or failed component
will effect performance, as that is an unmetered
air source & the pcm will drive fuel trim rich from
a lean condition

then your car is running tooooo lean

possible maf sensor dirty or needs to be replaced try cleaning the maf with a brake cleaner also a vacuum leak will cause same problem

check for vac. leak or bad injector dumping fuel

fuel pump?

use carb cleaner spray on the inside of the throttle body.

use super unlead only to prevent buidup.

cold engine only.

hope this helps
thank you
jm

dont go changing bits ,then find it still doesnt work ??chances are they are right but take it to garage as an incorrect diagnosis will cost you money in the long run

I'm leaning toward a bad sensor, as in throttle body temperature, or coolant temperature sensor. The smell of too much fuel is probably from pushing pedal to start, which shouldn't be necessary on a fuel injected vehicle. What does it do if you leave your foot off the gas pedal during start? As far as fuel filter goes, if it hasn't been done in a while, I'd do it anyway just as preventative maintemance if nothing else.