Q: My car doesn't want to go up hills. It has slow acceleration, and feels like it's not kicking into the next gear when I drive it.

asked by on February 16, 2017

When I first start my car I have no issues. It idles fine, but when I'm accelerating it feels like it doesn't want to go to the next gear. I've replaced the spark plugs and wires and put a new fuel filter on it. We checked the fuel pump, but the car doesn't die out when i go up hills. When I push it to try to make it change gears the car stalls and I can hear a sound like air escaping in tiny little puffs. I've been putting fuel injector cleaner in it and it helps a little but I have no power in my car, sorry if I sound crazy.
My car has an automatic transmission.

Catalytic Converter Replacement $279.51 - $3103.51 Get a Quote

Hi There, What you are describing sounds like you may have a clogged catalytic converter. The catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When the catalytic converter is clogged, this causes these gases to be backed up into the exhaust system not allowing the engine to breathe properly. When this happens, the engine is forced to work much harder to expel these gases. This often results in the engine bogging down, hesitating, shaking and causing very poor fuel economy. This should also cause a check engine light to come on as the O2 sensors should be reading the incorrect amounts of oxygen in the exhaust gases if this is your problem. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your catalytic converter.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

lost control of one wheel. on the left. seems broken

It sounds like you had a tie rod ball joint break or another ball joint break. You will have to have the vehicle towed to a shop for inspection, or to a safe area where a mobile mechanic can inspect...

Problems after transmission put in

Check to see if there is warranty coverage on the work that was performed. It is not clear if the issue is the engine jerking or the transmission jerking, or both. The noise, of course, is a clear indication of...

I have a 08 Chevy Equinox and 2 weeks ago I was driving and the traction control indicator light came on and suddenly all my clust

This problem is due to electrical connections on one or more computers in the vehicle. Try to disconnect and reconnect all the ECU,s one at a time and inspect the connectors for loose or corroded connections. The connections are known...

What is wrong with my transmission? 1968 Chevy Impala

Hi there. It sounds like the transmission forward clutch plates are slipping. First check the fluid level and fluid condition by putting the dipstick fluid on a clean white towel and seeing if you see what looks like sand in...

Replaced crankshaft position sensor, runs worse 2003 Chevrolet Tahoe

Hello - there are several possibilities for this kind of behavior. While it's possible the crank position sensor could fail in this fashion, fuel supply (as you first thought) is also a real possibility. A failed fuel pump relay will...

No reverse, all other gears work. 2000 Chevrolet Blazer

Hello - I suspect the reverse input drum/clutch has failed in some fashion. This is a common failure on high-mileage 4L60E transmissions as you have. I would recommend having your transmission inspected by a reputable transmission shop for further diagnosis....

How long does it take for a person to put a distributor in a Chevy Caprice 4.3

Hi there. It's very difficult to estimate repair time without seeing the vehicle or how many ancillary components need to be removed in order to replace a damaged component. A distributor specifically can be time consuming to remove and correctly...

P0420 bad under body catalytic converter 2003 Nissan Altima

Hi there - you are correct that there are 2 catalytic converters on your vehicle; one (sometimes called a pre-catalyst) that is part of the exhaust manifold, and a 2nd converter further "downstream" in the exhuast system. It is the...

How much does it cost to replace spark plugs on a V6 engine?

Billing question sent to CS for the cost to replace spark plugs on a V6 engine.

Related articles

A Buyer’s Guide to the 2012 Chevrolet Volt
Whether Whether you’re concerned about the environment or just want a vehicle that allows you to use less gas, the 2012 Chevrolet Volt might be just right for you. Designed to run entirely via an electric current, this electric hybrid...
2012 Ford F-150 vs. 2012 Chevrolet Silverado: Which One Should I Buy?
When you’re ready to really get some work done, there’s nothing like a full size pickup truck. These trucks are ready to haul a big load and really get in there and get busy. SUVs are great for moving people,...
2012 Toyota Tundra vs. 2012 Chevrolet Silverado: Which One Should I Buy?
Large work trucks are meant for one thing: work! These vehicles are rough and ready, and can handle nearly anything you throw at them, with the exception of a car pool. While they offer two or four door options, you...