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: no compression and cam sensor fault

In your circumstance, two possible causes of no cylinder compression are a broken timing belt or a faulty head gasket. Replacing a timing belt is a fairly common repair. Replacing a head gasket is somewhat involved, and will have more...

Q: Car won't start after someone tried to steal it

Two systems in the column need to work for the engine to start. The ignition switch, and the anti-theft system. Your car has some version of the Passlock anti-theft. The ignition switch reads a specific resistance of your key and...

Q: My car cranks but won’t start 06 Pontiac Grand Prix

A wire could have been dislodged or disconnected beneath the dash. To get an indirect indication of this, check for spark at the spark plugs. If no spark, there is probably a primary side ignition system circuit that was "touched"...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...