Hi Guys
I urgently need some help please.
Car have 262534 km on the clock

* When the car is in park, or driving it have a rough idle, and sometimes it looks like it's going to die
* It blows some smoke when I accelerate.
* it's jerking when I accelerate or slowing down
* when car idle and I rev it, it gives black smoke and driving a light white smoke
* Use a lot of fuel
* there is no power when I accelerate

Have done a diagnostic test:
Results shows its the Manifold Absolute Pressure sensor.

Parts I have replace:
* MAP sensor (Manifold Absolute Pressure sensor
* Throttle Body sensor
* Camshaft sensor
* Petrol Filter
* Oil filter
* Spark Plugs with High Performance Spark Plug cables
* Sometimes hard to start

I have use engine cleaner and fuel injector cleaner to clean the system.

But the car is till giving the same problems. I love this car... And don't ever want to sell it... I really want to fix it.

Can you please give me advice How to fix this problem.

Thank you all for the feedback. I appreciate it.

Regards
Verno

 

Check the coolant for color .. see if exhaust smell there?
Check oil inside oil valve cover ... see if mayo type goo is there
Trying to see if head gasket is broken or not

Assuming elantra is old .. may need timing belt change
Recommend checking this before driving the car any further
When was the last time it was changed?