Q: I have a 94 buick lesabre and the engine has a slight knock and it has white smoke coming out of engine also disconnected pos and.

asked by on

My engine has white smoke coming out of engine also disconnected POS and neg from battery while running and car.continued to run

My car has 230918 miles.
My car has an automatic transmission.

You should never disconnect the battery while running or it can spike the computer and alternator and damage them. The white smoke is coolant getting into engine from a leaking intake manifold or head gasket leaking. Check upper intake seals first and throttle body gasket seals before replacing the lower intake and head gaskets.

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. I have a 94 buick lesabre and the engine has a slight knock and it has white smoke coming out of engine also disconnected pos and.

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: Engine overheats with new radiator, new thermostat and fan relay

It is normal for the lower hose to be significantly colder than the upper hose, but it should still be warm. The upper hose should be almost too hot to touch with bare hands, and the lower hose should be...

Q: Would a faulty alternator cause smoking from under the hood on the passenger side?

If your alternator is failing, this can definitely cause it to smoke depending on how badly it has failed. When an alternator fails, the bearings inside usually have failed to a point that causes them to whine severely and, depending...

Q: The throttle position sensor has been replaced three times on a 2003 Buick lesabre. What is causing it to go bad?

Within conventional throttle position sensors there are metal contacts that sweep across a printed resistor board. Repetitive motion and vehicle vibration can cause these contacts to wear, over time, eventually causing sensor malfunction. If you are sure that the TPS...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...