Skip the auto shop - Our mechanics make house calls

Q: Engine smokes on start up

asked by on

I just bought Mazda 626 1999 model to replaced the old one but quite unfortunate the engine short oil within a month and I was adviced to change the oil which I did but the engine blowing blue smoke in the morning after start-up and when raising. I decided to return the engine back where it was bought but I was told that it was wiring problems. Is it true? What should I do?
My car has a manual transmission.

I’m presuming that you bought a used engine and had it installed which can be a risky business. If the engine is using oil and smoking out of the exhaust it probably needs major work. If you bought a remanufactured or a new engine, there may be a warranty. But with used engines it can be very hard to get satisfaction when they don’t work out. The idea that it may be a wiring issue seems a little far-fetched, though I suppose if there is a temp sensor driving the system rich it could be a possibility. I think your best bet is to have a technician from Your Mechanic take a look at this car. They can check out your oil consumption problem and tell you what it’s going to take to solve it.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Engine smokes on start up

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: Troubleshooting the fuel pump

Hello - qualified "yes" on this. The fuel pump should run for at least a second or two to pressurize the fuel system. I recommend double-checking fuses for the fuel pump and the engine management computer, the fuel pump relay...

Q: Car making grinding noise.

The water pump is the most common part changed on this motor and year. The noise once heard could be isolated to the water pump or a tensioner pulley. I recommend to have the system checked by a qualified mechanic....

Q: Water pouring out of car

Hi there. There are many components that make up your cooling system. A water pump, thermostat housing, and hoses are all common places a vehicle will leak besides the radiator. A loss of excess coolant can cause your engine to...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.