Q: Hesitation and smoke

asked by on

Starting my car in the morning i have a lot of exhaust come out (parked in garage) When it is warmed up about 30 minutes after i started driving and come to stop it may or may not hesitate and blow exhaust, i say may or may not because it doesnt happen all the time. I have changed oil, oil filter, spark plugs, engine flush and added BG44K, It still does what i explained but after all that i have done it is not as bad except when i get low on gas then it is worse.

My car has 78000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. While it is typical for the engine to give off some white smoke upon starting (as it burns condensation that builds while off at night), what you describe sounds more like a coolant leak. When the smoke is white and steam like, you are burning coolant. Start by checking the coolant level to see if it is low. If it is, you are leaking coolant into the engine, most likely through a blow head gasket. When the car warms up, the head gasket expands and closes the gap where the coolant is getting into. This may be the situation going on with your vehicle. Check the cooling system for leaks, and take any further diagnostics from there.

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
  1. Home
  2. Questions
  3. Hesitation and smoke

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: Q: Random misfires

Hello. There are several possibilities that could explain why you are having this problem. One possibility is that you could have one or more faulty fuel injectors, or the fuel injector wiring is damaged. Another possibility is...

Q: Does the bumper of my car need to be taken off to replace windshield washer fluid motor?

According to the Factory Service Manual for your vehicle, the front bumper does indeed have to be removed to gain access to the washer motor. Occasionally, manuals are mistaken as to procedure and/or "access", and thus there are sometimes acceptable...

Q: Q: Car smoking

Smoking coming from under your hood can be a couple of things. If there are any leaks, for example a leaking valve cover could be dripping oil down onto the exhaust manifold. This can sometimes come with a smell through...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...