Q: Engine and electrical system pulsating

asked by on

2004 Honda Civic LX..The entire electrical system pulsates, along with it the engine while driving..New battery and had the alternator tested three times..Replaced ground wires too..Been driving it like this since February. Sometimes it runs normal on any type of weather. What could be the problem?
My car has a manual transmission.

Hello, Quite often, electrical system surges are caused by damage to relay components. If the fuel pump or ignition system relay is damaged, it may cause the engine RPM to rise and fall or cause the pulsating symptoms you’re experiencing. The only real way to determine what’s going on with your Honda Civic is to have a professional mechanic complete an electrical system inspection.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Engine and electrical system pulsating

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: I’m going to Texas to get my oil pan changed by my dads mechanic shop I live in California , me and my fiancé are driving out ther

Yes, that should be fine particularly as you will likely be doing mostly highway driving. Stop and go driving and short trips greatly shorten the service life of engine oil while prolonged high speed driving generally allows more miles insofar...

Q: i already took off the wheel hub and bought the wheel bearing so how much would you charge to exchange the wheel bearing?

Hi there. If you would like one of our mobile mechanics to come to your location and complete the service, please fill out this request for a wheel bearing replacement; as we need further information for you in order to...

Q: Van shakes when started then quits when in drive.

This shaking feeling sounds like the engine and / or transmission mounts are worn allowing the engine to shake. The issue with the transmission possibly slipping is when the engine RPM's tend to rise up and the vehicle tends to...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.