Question about 1999 Chevrolet Malibu

1 Answer

Carbon monoxide coming through the vents. My fuel guage.

Everytime I turn on the heater or A/C on my car it smells like carbon monoxide coming through the vents. What could be the problem and the solution for this?
The fuel gauge of my car will only work when the tank is full, but when the tank becomes less than full the gauge will go down to empty. What could be the problem and the solution for this?

Posted by on

  • Horshack May 11, 2010

    Carbon monoxide is odorless.


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Chevrolet Master
  • 64,034 Answers

Go to a muffler shop and hve the system tested for leaks, don't take chances, the gas guage issue is caused by the fuel tank sending unit being defective.

Posted on Feb 12, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Propane incoming too high

Get a plumber Too many people die from carbon monoxide positioning they call it the silent smell warning

Oct 23, 2013 | Cars & Trucks

2 Answers

Car giving off a gas smell and carbon monoxide detector cant detect it

maybe exhaust manifold leak, if there it will come in through your a/c vents

Mar 14, 2013 | 1996 Mercury Grand Marquis

1 Answer

2004 Chevy Trailblazer V6, sounds like it is loosing pressure. Can smell exhaust inside vehicle and under hood.

A Carbon Monoxide tester for homes may be used inside your vehicle. This will verify your concerns about the fumes inside your vehicle.

If you hear something while the engine is running, you may have an exhaust leak. This is something a Muffler shop can check. I don't know about recommending a business as I probably do not live in your area.

Our site use to have affiliations with Repair shops and if you can go to an Online Expert's Repair shop you should get an honest repair.

Word of mouth advertising should get you to a good place. For an exhaust smell, since carbon monoxide is odorless, a sulfur smell would indicate problems in the Catalytic converter area. Or if your vehicle is burning a little oil, there would be a detectable odor.

Wish I could say it is an exhaust tube or O2 fitting leaking and solve your problem. Best I can say is protect yourself with a Carbon monoxide detector and have your vehicle visibly checked.

Please rate my info.

Jan 30, 2013 | Cars & Trucks

1 Answer

I have a 2005 Ford Escape - this past week have noticed exhaust fumes coming in through the heat vents- has been very cold here - could it be something frozen or another problem?

chec the entire exhaust area for leaks or smells--cold will often break worn parts--dont use car till its fixed--carbon monoxide is 200 times stronger than oxygen

Jan 17, 2011 | 2005 Ford Escape

1 Answer


An exhaust system leak can cause carbon monoxide to be to be leaked into the cab possibly through the HVAC vent system or through poorly sealing window and door seals.

Nov 29, 2010 | Chevrolet S 10 Cars & Trucks

1 Answer

L get the smell of petrol ocasionaly ,and a rattle in the exhaust?

This could potentially be serious. You probably have an exhaust leak but if you're smelling it you could be getting a large dose of carbon monoxide which can be very dangerous to your health. It accumulates over time and you're body can't get rid of it. Carbon Monoxide (CO) can kill you very fast. You need to get the exhaust system checked out and find out if there is a leak.

Dec 05, 2009 | 1985 Volvo GL

1 Answer

My 1999 Pontiac Grand Am is producing a smell from the engine that is coming in through the vents and I've noticed this off and on for a couple days. The Break and ABS lights came on today, though i had my...

Very probably a leaking exhaust. Its probably the joint between the manifold and the exhaust system. The ABS issue is probably a red herring.

Note. Get it checked out as that smell contains a lot of Carbon Monoxide and could cause you to pass out and die. Serious stuff!

Nov 04, 2009 | 1999 Pontiac Grand Am GT

2 Answers

Smoke Rollin out of my vents! HELP!


I think if it was carbon monoxide, you would have your wings by now ! .....or horns ?

Sounds more like coolant, is your Bronco smelling rather fishy these days ??

If so, it´s definitely your heater matrix leaking !

A Jar of Bars Leaks, in the cooling system might work wonders.

Good Luck !

A FixYa rating would be nice !


Feb 12, 2009 | 1988 Ford Bronco

1 Answer

Exhaust fumes coming through heater vents


Dec 14, 2008 | 2001 Ford Taurus

Not finding what you are looking for?
1999 Chevrolet Malibu Logo

212 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

64034 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides