Good day My tata with 155000km starts well but when I rev it , it drops the rev count a bit then goes up .When i accelerate with the rpm is between 1000 and 3000 the car jerks off or hiccups but when in motion over 60km/hr it's smooth .I have been to a mechanic who made me change the petrol pump coil but still the same and took my car from him because I can't keep on buying parts.