Q: Blue smoke coming from exhaust

asked by on

When car is under hard acceleration blue smoke is coming from exhaust

My car has a manual transmission.

Hi there, thanks for writing in about your 1985 Ford Escort. You may have bad oil control rings or valve seals on the intake valves leaking. Try to make sure the PCV system is serviced and is clean to not cause excessive crankcase pressure. If the system is okay, then one of the other engine problems may be present. If you want to have this looked at, a local expert from YourMechanic can come to the site of your car to have the smoke problem correctly diagnosed.

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. Blue smoke coming from exhaust

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: AdvanceTrac ISsue

The sensor output (from that wheel position) can be viewed on a scan tool and/or an oscilloscope. Once you confirm the output is there, and the waveform is correct, you should trace the circuit back to the ABS controller or...

Q: Intermittent high revving

Hello there, thanks for writing in about your 2004 Chevrolet Aveo5. While a revving engine is not a normal operation, there are a few common causes for this type of fault. The most common are a vacuum leak, oxygen sensor,...

Q: Would a major leak from my exhaust back box cause it to fail the emmisions test and LAMDA reading

Hello - while an exhaust leak can have a minor effect on emissions, I would not expect that to cause a "Fail" - UNLESS your state or metro area does tolerate an exhaust leak for safety reasons (carbon monoxide poisoning...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...