I will replace plugs first. I'm not in the states and is a little difficult to find a place where I can read the codes.
So I will work with the plugs first.

I'm thinking of buying a code reader, any recommendation?

Thanks

 

Look at the LAUNCH C-READER. Less than $60.
No buttons to use, just plug in and look. Four readout cycles clears the memory.

 

I think the failure was a "bad gasoline" I fill the tank in a different gas-station and the proble dissappears!!! but anyway I'm interested on the code reader!!!

Where can I order that reader?