Engine bogs down in First

asked by on

The engine bogs down when accelerating in First gear, but idles fine. I replaced both cats along with a new fuel filter, air filter, PCV valve, along with MAF, Idle Air, and both O2 sensors.

If the exhaust was blocked by the cats before, then some of the debris from the cats [catalytic converters] could have gotten into the pipe to the muffler, or blocked the muffler. Check to see if you can rev your engine without trying to drive it. If the engine still lacks power and the exhaust pressure is excessive, then the cats would need to be disconnected to see if the engine runs better. If it does, then the blockage would have to located in the complete exhaust system. The fuel pressure, if low, would not allow the engine to run above idle either. I recommend having a mechanic, such as one from YourMechanic, investigate your loss of power issue by inspecting your fuel and exhaust systems.

Was this answer helpful?
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

Check engine light is off and when I turn on the key the car won't start. Just happened after changing the clutch kit.

Hi there. If the vehicle ran before you performed the job for the clutch exchange, then back track the work you had performed and look for anything that is not plugged in. Most likely, the crankshaft sensor was unplugged and...

About engine

Hey there. This involves the often heard notion and fallacy of "perpetual motion." Yes, if you or something imparts a big enough force to a powerful enough rubber band you can actuate a piston. But due to the Law of...

Recall for Catalytic Converter on my 2003 Nissan Sentra

Hello. On most vehicles the catalytic converter can usually be covered for the first 10 years or 100,000 miles. Once you surpass either of these, the converter will not be covered whether it is under warranty or recall. If you...

Related articles

What Causes Hoses to Leak?
While While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission fluid Coolant Power steering fluid Brake...
Rules of the Road For Iowa Drivers
Driving Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in your own state, that does not mean you know them in all...
How to Avoid Back Pain in a Car
If 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 sitting in a car’s seat for a long drive. Sometimes,...