Skip the auto shop - Our mechanics make house calls

Q: When in reverse, jumpy acceleration; power loss when in reverse, vibrations when idles, exhaust sounds irratic

asked by on

My car has started acting very strangely. The acceleration is jumpy when low RPMs, when in reverse, and there's power loss. The car vibrates when it idles and the exhaust sounds are erratic instead of smooth. I've replaced the spark plugs, but that didn't help. What should I do next?

The ignition system has more than just spark plugs, and some of the other parts, like the plug boots or the coils, are causing the misfire and running rough.

I would remove and inspect the plug boots and coils for any signs of causing the misfire. They would show signs like carbon tracking or cracks in the coils.

I recommend calling a mechanic, like one from YourMechanic, to come to you and diagnose your car’s misfire and running rough issues.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • When in reverse, jumpy acceleration; power loss when in reverse, vibrations when idles, exhaust sounds irratic

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: Had oil and battery changed, and now the car will not start.

It is possible that during the battery replacement and oil change that something was unplugged accidentally. It is also possible that the battery could have been installed incorrectly. If the engine is cranking it is turning over. If everything was...

Q: Car shakes and hesitates upon acceleration.

A weak battery will cause all of the electronics to fail. If this was the case, you would have hard steering and radio malfunctions as well. There are quite a few components that could cause poor acceleration. You will want...

Q: I have a charging proble and more but good engine and transmission

It sounds like you have a short in the electrical system. They can be hard to find, but I would first focus on the wires under the dash, where you saw the smoke. It is possible that the melted and...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.