Question about 1999 Chevrolet Malibu

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1999 malibu smell engine coolant when first start engine then goes away after run for a short time

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Could be to diff things may have heater core going bad or head gasket

Posted on Oct 02, 2009

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Posted on Jan 02, 2017

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I started my Malibu in really cold weather. I smelled gas and opened the hood. Gas was running out from somewhere but it was night and i ccouldn't see where thee gas waas running from.A week later I...


Gas would leak out of a cold, hard, rubber fuel line. When the car warms up, the rubber line swells and seals itself up until it gets cold and leaks`again. Find that leaky fuel line asap or you're risking an engine compartment fire every time your car is started, when it's cold out.

Mar 09, 2011 | 1999 Chevrolet Malibu

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My Malibu is running hot while still, but when I get going the temperature seems to go back down. I can smell, like a burning antifreeze. Could this be the fan not turning on when standing still?


More likely is you have low coolant levels. If you can smell it, it means it is probably leak somewhere. Check your coolant level. If it is low, I would look under the car for antifreeze somewhere on the engine or engine compartment. Most likely you will just need to replace a loose hose or a hose with a hole in it. It should be an easy and cheap fix.

Oct 21, 2010 | 1999 Chevrolet Malibu

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My 1999 Chevy malibu keeps overheating even when the heater is on what is the problem?


You may have a radiator leak. Or your coolant level is low. Using the heater is not a solution to an overheating vehicle. You can usually smell coolant and see the leak. Often times a gasket can leak mixing engine oil and coolant, decreasing effectiveness of both sytems. Check color of fluids make sure the cooloant is viscus and not sludgy.

Also check coolant fan electric connections and fuses. The fan really cools down the engine moreso than coolant. It should kick on when your engine reaches a certain temp. If it does not the vehicle will overheat.

Aug 06, 2010 | 1999 Chevrolet Malibu

1 Answer

Car runs rough at idol,hard to start after it warms up.


048 Engine Hard to Start or No Start Scan Data for Starting Problems This is how you find problems like your's , viewing scan data , sensor data parameters . What are the fuel trims at ? +- 5 to 10 % . short an long term trims . Do you know what these are ? Are the O2 sensors switch normally ? What's the coolant temp ? Intake air temp . Is the check engine light on or flashing ? Mass air flow sensor data . Misfire codes ?
047 Engine Hard to Start or No Start Scan Data for Ignition
056 Engine Hard to Start or No Start Misfire Scan Data


Sep 12, 2017 | 2005 Chevrolet Malibu

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1999 malibu no heat change thermo flushed rad blew out heatercore line hoses are hot get heat for a few min then goes cold air works fine


Chk for a vacuum controlled heater valve in the system. Usually on a hose. When the engine is not running it is open, but as soon as you start the engine, it closes and soon after the coolant in the core is stationary and cools down. GoodLuck _Ned_

Oct 18, 2009 | 1999 Chevrolet Malibu

2 Answers

2000 Malibu...only 43,000 miles...just bought..fine for 4 weeks, then temp guage goes up FAST..pulled over, cooled off, added water...had to tow...replaced cracked radiator cap & thermostat..Ok for 4 days,...


hi its rob cylender head or cylender head gasket or ileak in cooling system check oil for creamy white sludge if non then take of radiator cap start engine see if it bubbles up turn of engine and smell into the radiator for fuel check accesive amounts of water or white smoke coming from tailpipe ether one of these maens cylender head of gasket blown

Apr 26, 2009 | 2000 Chevrolet Malibu

2 Answers

1999 malibu


head gasket leak will cause it to over heat,gas gage not working check sennig unit in the gas tank.

Sep 02, 2008 | 1999 Chevrolet Malibu

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