1998 V70 XC Poor idle and bad mileage after car wash

SA22C · Post by **SA22C** » 16 Nov 2015, 15:31

Hey folks,

I recently took my car to the car wash and it had one of those undercarriage sprayers meant to get salt and whatnot out of the wheel wells. After running through the wash, the car has developed a lumpy idle (fluctuations of 100-200 RPM along with a marked increase in vibration.) Alongside this lumpy idle comes very poor fuel mileage, somewhere in the range of 10 MPG if the real-time dashboard fuel economy tracker is to be believed.

I checked the codes and it appears that P0130 and P0172 have been thrown.

Should I be looking for a massive vacuum leak somewhere? Or did the wash maybe dislodge the wires on the O2 sensor? I'm not sure where to look for the vacuum leaks or the location of the o2 sensors, so any assistance would be greatly appreciated.

Thanks!

Post by **Ozark Lee** » 16 Nov 2015, 17:05

It may just have moisture in the distributor cap. If you can I would suggest that you just drive it for a hundred miles or so and see if it drys the ignition out. I have had the same problem after cleaning grease off of the engine at the hand sprayer car wash and it clears up pretty quickly.

...Lee