Adam welsh

Hi all I am new to this site and I was wondering if any one hase experienced this issue. My A3 jerks intermittently when upto 90 degrees on the temperature gage but only intermittently so not all the time when driving .I've changed the iat sensor and the map sensor but still have the same issue.The car was showing p0111 code took it to a garage and they still can't find the problem the maf is OK aswell