Correct no AC just the vent.
Prob need to get a CO monitor to see if carbon monoxide is building up inside!
After purchasing a new Ford Ranger PHEV 2.3L (petrol), In addition to the smell of a new engine, a rather pungent, chemical smell was noticeable in the cabin from time to time. At first, I thought it was exhaust fumes, as it was especially noticeable during traffic jams. After a while, I realized it was the evaporative windshield washer fluid. When braking and driving slowly, the liquid inside the reservoir splashes around and there is not enough air flow to blow it out of the hood, then the fan sucks it all in the cabin. Also, on the right side, where the washer fluid reservoir is located, there is a lot of heat from the engine, which further accelerates the evaporation process. Experimentally, I pumped out all the fluid, and the smell disappeared. Then I filled it with good quality washer fluid, and the smell became less noticeable, but I can still smell the chemicals in the cabin from time to time. Today, I tried to find where the evaporation might be escaping from the reservoir. I started blowing air through the filler neck and found the hole where the evaporation is coming from. It seems this hole was made specifically to prevent negative pressure from building up in the reservoir when the pump is running. But I think there should be a valve there that allows suction but prevents vapors from escaping. If not, probably I should make one myself.
