Car Doctor: Suggestions for year-round convertible

Favorites mentioned are a BMW 4 series, that is a unequivocally good hardtop convertible, and a Jaguar F-Type with a 340 horsepower V-6 and all-wheel drive.

Q: we would like to buy a midlife-crisis sports car, though would like to expostulate it year round, even in a snow. we would cite a vehicle with all-wheel-drive, any thoughts?

A: There are a integrate of good choices. Two of my favorites are a BMW 4 series, that is a unequivocally good hardtop convertible, and a Jaguar F-Type with a 340 horsepower V-6 and all-wheel drive. Even with all-wheel-drive we unequivocally need winter tires.

Intermittent quick idle

Q: My nephew has a 1998 Chevy with low mileage that was hereditary from another relative. The problem is an few quick idle.

Most of a time a idle speed is a sincerely normal 800 RPM. But infrequently it runs during 1800 RPM and can go as high as 2400 RPM. we have pulled adult on a gas pedal and checked a wire underneath a hood with no change.

The scold emporium checked a idle control and pronounced it was fine. we am disturbed that it will run divided or repairs a involuntary transmission. What can we have them check?

A: A opening trickle can means a high idle. Possible sources are a PCV hose as good as a intake manifold, both can means opening leaks that can means a idle speed to jump. The other common emanate is a coolant heat sensor. This sensor or a compared wiring can be intermittently faulty. When this happens a mechanism thinks a engine is cold and speeds adult a idle.

Normal shifting

Q: My new-to-me 2013 Nissan Rogue doesn’t change when it is cold. It seems to stay in initial gear. Once it warms adult it seems fine. we purchased a vehicle from a co-worker, so there is no warranty.

Any thoughts and is this going to be costly when it fails?

A: Your Nissan Rogue and many Nissan products don’t indeed change gears. The delivery is referred to as a CVT or invariably non-static transmission. This form of delivery has an gigantic series of effective rigging ratios to optimize energy and/or fuel economy. Based on my believe with late indication Nissan products, we would cruise this evil normal and zero to worry about.

Chattering transmission

Q: Over a past year my Honda Accord has been presenting a sign of what feels like a delivery “chattering” when we step on a gas. This customarily happens in reduce gears.

I’m certain that we saw a question/answer in your mainstay recently addressing this problem. We would like to locate this emanate underneath a extended guaranty that is adult soon. The dealership says that it has no believe of this form problem. Any ideas?

A: The chattering problem on some Honda products has been marinated with a delivery liquid change and a mechanism update. we would ask a dealership if there are any updates accessible to heal this problem. The sign we report could also be a commencement of an engine misfire and is positively value looking into.

Pesky engine light

Q: I possess a 2004 Dodge Ram truck. The check engine light comes on and afterwards goes off and it is now behind on.

I had a exam that showed a formula of PO138 that indicates a problem with a oxygen sensor. we transposed a oxygen sensor and afterwards a light came behind on. we contacted a automechanic that services my car and was told this is standard and it doesn’t always scold a problem and it could be a mechanism issue. What do we think?

A: Computer error codes can infrequently be misleading, even to a best technician. There is a specific difficulty sharpened procession that needs to be followed for scold diagnosis and repair. The wiring, connections, and a sensor itself need to be checked before a mechanism should be considered. we have seen many cases that a heater circuit in a oxygen sensor fails. In these cases replacing a sensor or repair a wiring solves a problem.

— John Paul is a AAA Northeast Car Doctor. He has over 30 years of believe in a vehicle attention and is an ASE-Certified Master Technician. Write to John Paul The Car Doctor during 110 Royal Little Drive, Providence, RI 02904. Or email and put “Car Doctor” in a theme field. Saturday mornings during 8:30, balance into John Paul The Car Doctor at Follow him on Twitter @johnfpaul or on Facebook.

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