Q: Engine making a kind of choppy noise

asked by on November 06, 2016

I got my car straight piped a while back and it never really gave me trouble till recently, it doesn't always happen only when I push my car and accelerate to quickly it'll start to make the noise, when I drive normally it doesn't happen. Their is no smoke or steam coming from my car, it's completely operable. Just makes the noise.

My car has 75000 miles.
My car has a manual transmission.

Exhaust System Inspection $79.99 - $89.99 Get a Quote

Hi there. One of the negative drawbacks of replacing OEM exhaust systems is the noise you’re hearing. This noise is typically caused by small backfires inside the combustion chamber due to the fact that most people don’t tune the engine to match the new exhaust design. You can take your car to a BMW specialist who will most likely adjust the fuel and ignition timing to fine-tune your vehicle or you can contact a professional mechanic to inspect the vehicle’s exhaust system for any other mechanical problems that may cause damage to 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

Why my car sticks in gear

Hey there. This maybe related to many different transmission components such as a speed sensors, the transmission control solenoid or the module itself. The transmission control solenoid controls the flow of transmission fluid inside the transmission. Every time a...

Engine cranking but no spark (no trigger signal )

Hello and thanks for contacting YourMechanic. The trigger for your ignition system lies within the computer system. Your computer is not allowing the ignition to trigger the power. The coil should have power to it and a ground wire. The...

Car misfires; loud engine noise

If your vehicle is misfiring, and making lot's of noises, there is probably some sort of engine performance related problems. Symptoms like these can be caused by the need for a tune up, to a problem with one of the...

Overheating 335xi, new hoses/no leaks, waterpump is fine, no heat, used stop leak but car sat around for 2 months.

Hi Marc. Thanks for contacting us today. In most cases, if your heater does not produce hot air, then the issue is that the heater core is clogged with debris. Using stop leak products tends to create this problem. It's...

Hi Jeffrey! A hose popped in my G37 and I saw blue coolant splash on everything under the hood.

Hi There, It sounds like you may have had a radiator hose burst resulting in the coolant leaking as you describe. This can happen when these hoses get old or develop cracks in them which causes them to become brittle...

Air con sound knocking

If your air conditioning compressor is making a knocking sound the best thing to do would be to have it replaced by a qualified professional. It is very bad on the engine to run the air conditioning when the compressor...

I just changed the battery and alternator. Now my air conditioner is blowing hot. What can I do?

Hello. If you recently serviced the electrical system and now your AC is no longer working then it may be possible that the issue is related to the work. The first thing I would do is check the vehicle's fuses...

Overheat light came on

Hello. Yes, your vehicle is equipped with an electric water pump that may have experienced a failure. Once an engine overheats, the thermostat is usually damaged in the process and it is recommended both be replaced at the same time...

When I go to crank my car the key stays in the start position and the car is constantly trying to crank itself.

First, let's make sure about some terminology before I proceed. I will assume the motor is actually turning over. If the car is trying to start, the motor has to be turning over or it is not trying to start....

Related articles

Top 10 Factors to Consider When Buying a Luxury Car
The The idea of owning a luxury car is appealing. The glossy paint, swoopy lines, and prestigious badges speak of the owner’s success in life, while the interior opulence offers scented leather surfaces, high-tech telematic devices, and all the creature-comfort...
How Long Does an Exhaust Air Supply Tube Last?
Since Since 1966 car manufacturers have had the pressure on them to drastically reduce the amount of emissions that vehicles send out into the atmosphere. Technology has come a long way in that time, and has allowed for all kinds...
What Causes an Exhaust Manifold to Crack or Leak?
Your car has two manifolds – an intake manifold and an exhaust manifold. Both serve essential purposes, but the one most likely to...