Skip the auto shop - Our mechanics make house calls

Q: What's wrong with my car?

asked by on

It sometimes hesitates to start and will sometimes puff out white smoke out of the exhaust but not often. A few times I've smelled coolant while driving but not recently. It's slow on acceleration from a stop and once cut off on the highway. It now feels like it doesn't want to accelerate after changing spark plugs. I couldn't go over 25mph before then. It is also shaky when I drive it and the coolant runs out fast. Also one day my oil was clumpy on the stick when I checked it but it hasn't done it again. Please help me, thank you.

My car has 142150 miles.
My car has an automatic transmission.

A: Hi there, thanks for writing in. Without be...

Hi there, thanks for writing in. Without being there to inspect your Nissan Altima’s engine on site, it’s very hard to give you an exact diagnosis. However, the white smoke and smell of coolant leads me to believe that you might have a blown head gasket or it’s leaking. The white smoke tends to be caused by coolant in the oil. If the oil is "clumpy" or "milky" this is also an indication that you’ve got coolant leaking inside your engine block. Best bet is to have a professional mechanic inspect your vehicle for smoke coming out of the exhaust pipe. This will allow them to eliminate some issues and pinpoint the source of your problems.

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

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: Brake disk

This may be potentially several things ranging from a brake rotor that is hanging up to a fuel supply issue. Depending on the nature of how the car jerks, this could be many things. I would recommend having this looked...

Q: Need to know if I can salvage parts

If the crank pulley is loose, you need to find out if the keyway (a tiny rectangular metal piece) is still in position on the crankshaft. The keyway holds the crank pulley in position and must be in place to...

Q: Maintenance Suggestions

When you bought your car, along with the owners manual, there is a factory recommended service schedule booklet. Following the recommendations on that booklet is crucial while the car is under factory warranty. If the services the manufacturer recommends at...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
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...