Why is my car loud at idle and when accelerating 2004 v6-...

Q: Why is my car loud at idle and when accelerating

asked by on October 03, 2017

A couple weeks ago, my car had gotten acceleration problems. I got it tuned up. Still had problems, found out the egr valve gasket was blown. Got a new egr valve and gasket, changed the fuel filter as well. At idle it sounded like a brand new car. It drove better until I hit 40mph and i heard this clicking noise, it went away. Then again at 40 I had to let off the gas because it would rev like it’s in idle hitting the red limit(only when I tried to floor it) So I drove normal 2 days later. I hear this clicking noise. I lift the hood. And hear a clicking noise coming from the egr valve. I go to autozone and they said I have a bad map sensor. That’s the only code that popped up. Well I wouldn’t be able To fix that until Friday. Now I’m thinking does a clicking egr valve have anything to do with that. So I’m driving at night and out of nowhere my car gets loud as I accelerate. I turned it off and it’s still loud. And when I’m crusing it kind of goes away until I accelerate. Help ? thecat?

My car has 195000 miles.
My car has an automatic transmission.

Generally loud "noise", especially on acceleration, is due to exhaust system leaks or internal muffler (e.g., baffle) failures. The ticking noise is more likely coming from the valve train and not the EGR valve. The OBD-II diagnostic code that "refers" to the MAP sensor can NOT be used to condemn that part especially as MAP sensor out of range readings can simply be due to fluctuations in intake manifold pressure which can in turn be due to faults that have nothing to do with the MAP sensor itself. As an aside, GM MAP sensors RARELY fail. Most are replaced because people mistakenly assume that a "trouble code" that includes the sensor is an actual diagnostic. Trouble codes are NOT diagnoses and thus you should never replace a vehicle part SOLELY on the basis of a trouble code! I think in your circumstance, you are going to be best served by requesting a vehicle noise diagnostic. Although that is nominally the diagnostic, the responding certified mechanic will evaluate all of the concerns that you have referred to in your question and then get the underlying fault(s) resolved. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

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

Door loose

I will assume that the door is hanging, and does not line-up properly when closed. There are a few situations that can cause the door to hang loose: The hinges holding the door on may have started to fatigue, or...

Service Park Assist light came on while driving and the car disabled me from pushing on the gas. 2009 Buick Enclave

Hello - first task is to get the problem codes that may or may not be illuminating the Check Engine light. The Parking Assist issue is limiting engine power to avoid big power surges while parking. This may require service...

Car completely dead.

If your vehicle has sat for some time you may be able to get it started again by simply getting a jump start. If a jump start does not work you can try calling a professional to test your battery....

Related articles

The Best Used Cars to Buy If You Love Road Trips
If If you love to travel, comfort is very important in a vehicle. You want a nice, quiet ride, comfortable seating, and enough room. We have evaluated several used vehicles, and narrowed our favorite road trip vehicles down to the...
A Buyer’s Guide to the 2011 Buick Lucerne
2011 2011 marked the final year of production for the Buick Lucerne, a venerable full-sized sedan that offers ample room in the interior. The car was noted for the significant amount of interior space and trunk space offered, although it...
Buick Certified Pre-Owned (CPO) Car Program
If If you’re in the market for a used Buick vehicle, you 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...