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i had bought a chevrolet uva car in november 2007.the car was doing fine untill 2009 october.the car started jurking and started showing a check light. I took the car to metro motors,vasant kunj and they delected the code.but after a few days the check light started blinking again.after several visits they changed a part called map sensor. But the proble remains unsolved,after driving the car for few kilometers the light starts blinking again.this time i changed the service station and took the car to auto vikas service station where they are again after leaving the car with them for 2 days are unable to detect the problem.the staff seems to have no knowledge about the car on this.each time i call them up,they tell me to bring the car to them, they are least cooperative about the problem.please suggest me a solution on this.my car number is dl 4c ad 3348.pls revet asap
shantanu kaushik
44 ram nagar
new delhi-110055
9811713068