28-02-2025
Why does it take so long for my car to fill with gas?
A: The first thing to do is look for an obstruction in the fill pipe. It the pipe is undamaged, then the next step is to inspect the evaporative emission system.
The gas tank has a vent as part of the evaporative system that allows gas fumes to be burned during combustion. If the vent valve is clogged, the tank will fill very slowly. This can be caused by a faulty vent valve, dirt and mud buildup or even spider webs.
Q: I have a 2023 Dodge Charger SXT RWD with original equipment and wheels. The tires are 17-by-7-inch wheels with Michelin Energy Saver P215/65R17 tires. I will be changing to the factory optional on SXT trim, 20-by-8-inch wheels with Michelin Pilot Sport All Season 4 P245/45R20 tires.
I have inquired via email to the service departments of two Chrysler Dodge Jeep Ram dealers but have not received a response. With the tire size change, would you know of any size codes, module or software updates that would be required to have the speedometer, odometer and transmission shifting be accurate and work properly? Is there a special tool for this?
A: The new tire/wheel combination is about a half inch larger. As an example, with the speedometer reading 65 miles per hour, your car will actually be traveling at 66.6 miles per hour.
I have an Innova tablet scan tool. I would describe this tool as a serious DIY, almost pro-level scan tool that has the capability to change tire sizes.
Q: I am wondering about your overall opinion on the Chrysler Voyager minivan. I am searching for the basic minivan to get from point A to point B. I do not need the luxury of the Pacifica. There is not much to choose from with minivans these days.
A: The Chrysler Pacifica and Chrysler Voyager are essentially the same. The Voyager was produced more for fleet use, although I understand it is coming back to the retail market for 2025. My bigger concern is that the company itself seemed to be struggling with declining sales and profits in 2024. The company has taken action to address these challenges, so time will tell.
If I were to rate minivans, I would put them in this order: Toyota Sienna, Kia Carnival, Honda Odyssey and the Pacifica/Voyager.
Q: One of my friends has a 2015 Nissan Altima. When he tries to turn on the car, the dashboard shows "key not detected." Do you have any suggestions on what could be wrong and how to fix this?
A: I would start with replacing the battery in the remote fob.
If that doesn't work, try the spare fob if one is available. If the second fob works, the first fob may need programming.
After that, the next step is proper diagnosis of the problem. This includes testing the receiver and possible antenna issues.
Q: I have owned a 2001 BMW M Roadster since 2011. I am the third owner, and it only has 28,000 miles. I have all the service records, and it has been maintained steadily throughout its life. The DSC (traction control) and ABS warning lights are on. The diagnostics revealed a faulty steering phase angle sensor. It has been replaced, but that did not resolve the problem. I was advised that this particular DSC electronic module has gone bad and needs to be replaced as well. My mechanic (whom I have used for years to service this car as well as my daily drivers) is having difficulty locating this part. It is no longer available from BMW, and reconditioned ones are not readily available. Any suggestions?
A: Short of buying a used part on eBay motors (there seems to be several), perhaps try rebuilding the faulty part. Readers have told me they've had good luck with UpFix. ( From talking to the technicians at Upfix, they seem to be able to fix any electronics.
Q: I have heard that you offer (and know of places that offer) inexpensive VIN etching for automobiles. Please let me know how and where I can have that done for my cars, and if it's worth it.
A: The theory behind VIN etching is that if the vehicle identification number is permanently engraved on a car's windows, it may deter thieves from stealing your car. Studies are mixed on whether it actually works. You could try your local police departments. I know in the past I have seen some perform this as a community service with minimal cost. I have also seen DIY kits for $20 online.
John Paul is the AAA Northeast Car Doctor. He has more than 40 years of experience in the automobile industry and is an ASE-Certified Master Technician. Write to John Paul, The Car Doctor, at 110 Royal Little Drive, Providence, RI 02904. Or email jpaul@ and put 'Car Doctor' in the subject field. Follow him on X @johnfpaul or on Facebook.
This article originally appeared on The Providence Journal: Why does it take so long for my car to fill with gas? | Car Doctor
