Q: My engine is shaking and smelling like gas and my exhaust is real smokey and it's driving slow won't speed up

asked by on February 18, 2017

My engine is shaking and smelling like gas and my exhaust is real smokey and it's driving slow won't speed up

My car has 205000 miles.
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. A clogged or failing catalytic converter can cause the vehicle to have poor fuel economy. 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. 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. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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

The car makes loud shaking/jarring noise when the steering wheel is only slight turned rightward. There is no noise when turning left.

Hi there. From the description you have provided, the noise you are hearing from the rear of the vehicle and the feeling your vehicle has while driving, should be looked at sooner than later. The swaying (fish-tail) action, could be...

05 XL-7 CAN FRONT CRANK SEAL BE REPLACED WITHOUT REMOVING TIMING COVER?

The seal has to be accessible (that is visible and there is enough room to pry it out) on removal and, as well, there has to be enough space to press it back in using an appropriate seal installation tool....

Trouble with car wanting to crank

The Check Gas Cap indicates there is a problem with the evaporative emissions system on your car. Some manufacturers began using this message because of the prevalence of missing gas caps contributing to this code. If your gas cap is...

Got P0420 code and I had the catalytic converter replaced but still have the code. What is going on?

The code P0420 can be caused by the catalyst, O2 sensors before and after the catalyst. If both O2 sensors and catalyst was replaced then you may have an exhaust leak at the manifold or pipes. I suggest you have...

Key stuck in the acc position. Car will not start

It sounds like you have an ignition switch that has failed. Inside the switch is a set of tumblers that the key is designed to fit into. When these tumblers wear out over time due to the key being inserted...

How do I tell if my power steering is going bad in my 2005 BMW x3?

Hi, thanks for writing in. Unfortunately, it sounds like your steering rack is done for, and needs to be replaced. This appears to be a wide-spread problem with this vehicle, without a recall or customer satisfaction program from BMW. If...

Car making thumping sound

A thumping is most likely coming from the front rotors being warped, and the pads jumping back and forth in the caliper while braking. The rotors and pads should be inspected and replaced as a set; putting new pads with...

car showing codes P0133 and P2096.

Based on those two codes, it is likely that your gas mileage has decreased somewhat even though you might not notice any operational problems. P0133 means that the rate of response of the oxygen sensor voltage output on bank one...

Smoke from engine cooling fan

It's not unusual for a fan to fail, and you can probably get away with replacing just that. But since the fan seized, there may be a blown fuse or fusible link back in the system that will also have...

Related articles

2007 Nissan Versa vs. 2007 Saturn Ion: Which One Should I Buy?
Compact cars as a class are generally meant to be commuter vehicles: with excellent gas mileage, an entry-level price point, and decent safety ratings for those who are on the road the majority of their time. These cars also make...
Saturn Certified Pre-Owned (CPO) Car Program
Drivers Drivers who are shopping around for a used Saturn vehicle may want to check out cars under their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to...
2005 Kia Sorento vs. 2005 Chevrolet Blazer: Which One Should I Buy?
SUVs are great for playing out in the mud, taking kids and friends around to different places, as well as just running errands around town. While they are not known to be terrific for gas mileage, that problem is negated...