Hi all. I have Honda jazz ge 2013 1.4 vtec with 57000miles on it and I'm scared that it have either simple fix issue or many expensive.
So two months ago in neitral gear after taking out from gear car start rpm float from 1k to 300rpm at random times.Took off air filter and car stalled but never before. So i disconnected battery pluged back after 3h and issue never came back.
However... When engine is cold and i i changed to gears there's flat spots in power, delay in acceleration. Next the biggest problem is every time i change gears well 90% on releasing clutch and applying gas it stutters for 2 seconds. Rpms stay good no issues. Car been put to code reader no codes. When starting from cold car smells quite a lot of a petrol and i think my mpg is down (recently driving more in city), when driving on motorway before i had 56mpg now on 50mile trip 46mpg with 98octane.
K&N air filter, gearbox oil, engine oil been changed and filters.
Some say valve adjustment, spark plugs, ignition coils.
But i start to think Air leak, maybe smtn with MAF... I hope and don't think headgasket.
Any advise!? I really don't want to go trough all the suggested list before then its easier to sell it but i love that car so much.