Since last week, I have been noticing hesitation sometimes when passing through 2000-3000 rpm range.

I can idle the car in this range and when I slowly step on the gas, the engine sometimes hesitates before the rpm goes up.

I first suspected the MAP sencor and took it off and gave it some taps (quite hard actually) but did'nt help.

Now I'm suspecting the spark plugs or the ignition coil.

Doesn't sound like the MAP sensor does it...?

 

does it occur with the a/c on and also off?

 

is it after hitting speed bumps?

 

Have you tried resetting the ECU?

 

O.K. ...
Got the car fixed last week.
FIrst, the scanner showed fuel too lean or rich and the O2 sensor output was very unstable.
They first tried replacing the O2 sensor but did'nt work.
They checked for leaks and fuel pressure but all was O.K.

After two days of search they found an unstable connection near the ECU and fixed it.

That took care of the problem.

Thanks for the suggestions!