Skip the auto shop - Our mechanics make house calls

Q: Loss of power esp on hills

asked by on

One day last week my truck would not start. It had been running fine. I had it towed to the mechanic. First they said it was an electrical problem, then that it needed a new gas pump. They replaced the pump. Now it is very sluggish until it gets going. I am having a lot of difficulty on hills, esp frim a slow start.

My car has 211000 miles.
My car has an automatic transmission.

This may be a sign of a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When this is clogged, this causes these gases to be backed up into the exhaust system not allowing the engine to breathe properly (think of a backed up sink). 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.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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

Get a quote

What others are asking

Q: Plug leaking fluid

Coolant expansion plugs can leak in two different ways, they either corrode through or the surface between the plug and the block/head surface develops a leak. In either case, however, the plugs cannot be re-used. The coolant expansion plugs must...

Q: Weird sound and shaking as well as lower gas mileage and poor acceleration

It sounds like you may have a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere. When this is clogged, this...

Q: Why would my 2003 Chevrolet Impala stall and now it runs rough.

Hello. Though there are a lot of things that can cause this typically it is due to an issue with a failure in a spark plug or an ignition coil failure. If there is not a check engine light on...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...