I've been reading A LOT about fuel smell in cabin of car in Hyundais, somehow related to PCV hose, worse while idling or warm start. Can you explain what's going on?The history is that 2 weeks ago she'd had fuel pump replaced & then 5 or so days later began noticing fuel odor, which now seems to be coming from under hood & through A/C vents.She has asthma which is being aggravated by the odor.
Hello, can you please tell me the year and model of the vehicle. Also tell me if the CHECK ENGINE light is ON.
hello, I am looking into this.
Really? Are you researching this issue or have you stepped out of this chat, since it says both?
I don't want to leave negative rating; but so far, the service has been poor, to say the least. Inconsistent, slow, confusing, at best.
Different expert here . Did you need further assistance ?
Hi Jennifer, I am looking into the issue. Please give me some time. I will get back to you with information.
OK, thanks for the update
Is the check engine light ON?
If there is a fuel vapor leak the computer would have notify you with a check engine light.
There is a system in the vehicle that monitor the fuel leak and HC hydrocarbon vapors release into the atmosphere. It is called the EVAP system. The vapor canister is under hood.
Evaporated vapors from the fuel tank are collected in the charcoal canister, where the activated carbon surface captures and stores the vapors. Fuel vapors passing over and through the activated carbon surface are absorbed and the remaining volume of fresh air vents through the normally-open Canister Close Valve (CCV) and the vent system. When this canister is full or malfunction it will turn ON the CHECK engine light.
There are three things I would like to you do.
Please let me know if you have further question.
Inspect the hose for leakage and the PCV. Here is the picture and location. See #2.
I'm sorry, where is the hose? You're saying PCV, earlier you said CCV?
The pcv hose is attached at the end of the pcv. Did you see the picture?The ccv is different than the pcv. The ccv is part of the canister vapor system unit.
And where should I find the PCV? Yes, I saw picture, but it makes no sense to me? But, I can take to mechanic as long as I know where it is, what it stands for, and can speak intelligently about it.So, what does it stand for, where is it located and what's its function?
PCV stands for positive crankcase ventilation valve. The purpose of the PCV System is to regulate crankcase pressure and ventilate blow-by gases from the crankcase into the intake manifold. It is part of the emission system. The Hyundai's PCV system consists of the positive crankcase ventilation valve and an air supply hose. The PCV valve uses spring pressure to hold the valve in the open position while the engine is off. Basically the valve is to restrict any blow by fuel gases from escaping the atmosphere.
When you accelerate, there is a drop in manifold vacuum. This results in maximum crankcase ventilation. When the engine is at idle or cruise high manifold vacuum pulls the valve upward blocking the port to the intake manifold. This is because manifold vacuum pressure is greater than the PCV valves spring pressure.
The Hyundai Sonata with 4 cylinders - The PCV is located on the valve cover. It is next to the oil cap where you put the oil. Do you see a rubber tube there? Once you remove the rubber tube, you will see the PCV.
Here is a picture at the PCV rubber hose.