Welcome to City-Data.com Forum!
U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Automotive > Brand-specific forums > Chevrolet, Cadillac, Buick, and GMC
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
 
Old 07-15-2013, 12:25 PM
 
Location: In the middle
149 posts, read 347,732 times
Reputation: 224

Advertisements

Quote:
Originally Posted by victimofGM View Post
Does your dashboard have a temperature display and do you pay attention to it? If so, do you notice it getting up to normal operating temperature before you reach work? if not, when you turn on your car's heater, does it get hot before you get to work in the winter?
I have an engine coolant temperature gauge. It gets up to normal temp before I get to work. And my car's heater gets hot before I get to work in the winter.
Reply With Quote Quick reply to this message

 
Old 07-15-2013, 01:40 PM
 
14,780 posts, read 43,687,668 times
Reputation: 14622
You need to take it to a mechanic and have them drive the car with a scan tool hooked up. This will let them read all of the outputs and subsystems and see if there is anything actually wrong. If it was a sudden loss, I have to think there is something broken if it's not triggering a CEL. If it's been a steady decline, then it could be something related to longterm wear/buildup. It could be as simple as a brake issue where something is wrong with either the e-brake or one of the calipers, so the brakes are dragging causing the sound and lowering the MPG.
Reply With Quote Quick reply to this message
 
Old 07-15-2013, 01:44 PM
 
Location: In the middle
149 posts, read 347,732 times
Reputation: 224
Quote:
Originally Posted by NJGOAT View Post
You need to take it to a mechanic and have them drive the car with a scan tool hooked up. This will let them read all of the outputs and subsystems and see if there is anything actually wrong. If it was a sudden loss, I have to think there is something broken if it's not triggering a CEL. If it's been a steady decline, then it could be something related to longterm wear/buildup. It could be as simple as a brake issue where something is wrong with either the e-brake or one of the calipers, so the brakes are dragging causing the sound and lowering the MPG.
It was pretty much a sudden loss. All of a sudden I started to realize I was filling up my car a lot more than I used to. I have an appointment with a mechanic on Friday.
Reply With Quote Quick reply to this message
 
Old 07-15-2013, 02:13 PM
 
Location: In an indoor space
7,685 posts, read 6,195,293 times
Reputation: 5154
Quote:
Originally Posted by xraychick01 View Post
It was pretty much a sudden loss. All of a sudden I started to realize I was filling up my car a lot more than I used to. I have an appointment with a mechanic on Friday.
GOOD!

You can't go wrong with NJGOAT advice.

IMO: Let the mechanic give the car a thorough going over of everything they could check.
Reply With Quote Quick reply to this message
 
Old 07-15-2013, 02:36 PM
 
16,825 posts, read 17,730,892 times
Reputation: 20852
Quote:
Originally Posted by xraychick01 View Post
I have a 2009 Chevy Malibu LT2. It's approaching 60,000 miles. I've been noticing a severe decline in my gas mileage. I drive only a short distance to and from work during the week. I know it's not the city driving because I've always had this short commute and I've never, ever gotten such terrible gas mileage. I've calculated it several times after I filled up and it's averaging 13mpg! I've also noticed a strange noise when I push the accelerator...a sputtering/clicking noise. It's hard to describe how it sounds.

I have an extended third party warranty on the car. I can't get it in to the mechanic until next Friday. My question is what sort of thing(s) could cause such a decrease in my gas mileage? I'd like to have some idea before I take it in.

Thanks!!
Have the manifold checked. Might be a leak, can cause a "gulping" sort of sound (if it is on the intake).

You might also see a loss of acceleration/power and more engine smell than normal inside the car (if it is from the exhaust end instead of intake).
Reply With Quote Quick reply to this message
 
Old 07-16-2013, 07:54 AM
 
Location: South Jersey
7,780 posts, read 21,878,330 times
Reputation: 2355
Quote:
Originally Posted by lkb0714 View Post
Have the manifold checked. Might be a leak, can cause a "gulping" sort of sound (if it is on the intake).

You might also see a loss of acceleration/power and more engine smell than normal inside the car (if it is from the exhaust end instead of intake).

That would cause a check engine light. The air would be non measured and would cause a lean mixture.
Reply With Quote Quick reply to this message
 
Old 07-16-2013, 08:15 PM
 
16,825 posts, read 17,730,892 times
Reputation: 20852
Quote:
Originally Posted by frankgn87 View Post
That would cause a check engine light. The air would be non measured and would cause a lean mixture.
For all I know totally true with the malibu, I did not have the check engine light come on when the exhaust manifold had a leak on my Saturn Vue. The check engine light came on at start up, but never with the manifold issue.
Reply With Quote Quick reply to this message
 
Old 07-18-2013, 08:39 PM
 
Location: H-town, TX.
3,503 posts, read 7,498,923 times
Reputation: 2232
Quote:
Originally Posted by xraychick01 View Post
I have a 2009 Chevy Malibu LT2. It's approaching 60,000 miles. I've been noticing a severe decline in my gas mileage. I drive only a short distance to and from work during the week. I know it's not the city driving
Yeah, actually, it is.

I know one of those "old ladies from church", quite literally, who probably does the same short drives to church for work. Her v6 Buick (a 2000 LeSabre?) got about 13 MPGs.

Cure: Take the grandkids to the mall 50 miles away and let the engine air it out once in a while. In her case, her MPGs shot back up after that.
Reply With Quote Quick reply to this message
 
Old 07-19-2013, 06:22 PM
 
Location: In the middle
149 posts, read 347,732 times
Reputation: 224
So the Chevy service center says my exhaust manifold is cracked which they said is causing the clicking/sputtering sound when I give it gas and the really bad gas mileage.
Reply With Quote Quick reply to this message
 
Old 07-19-2013, 06:24 PM
 
Location: In the middle
149 posts, read 347,732 times
Reputation: 224
Quote:
Originally Posted by AlfredB1979 View Post
Yeah, actually, it is.

I know one of those "old ladies from church", quite literally, who probably does the same short drives to church for work. Her v6 Buick (a 2000 LeSabre?) got about 13 MPGs.

Cure: Take the grandkids to the mall 50 miles away and let the engine air it out once in a while. In her case, her MPGs shot back up after that.
If it's the short trips around town then why, in the three years I've had the car, is it JUST NOW getting such bad mileage??? Those short trips around town and to work aren't something I just now started doing.

The service center said it's a cracked exhaust manifold.
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:


Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Automotive > Brand-specific forums > Chevrolet, Cadillac, Buick, and GMC
Similar Threads

All times are GMT -6.

© 2005-2024, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Contact Us - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37 - Top