Refer to earlier posting where my Honda Airwave 2009 overheated due to a thermostat issue : after replacing
thermostat, for the first few days, the car had very bad frequent 'coughing' which became almost unnoticeable
after a few days.
For the last 1 week, this 'coughing' / misfiring returned but not as 'violent' or frequent as when the first few
days after the thermostat got replaced.
As I'm trading in this car, I'll need to get it fixed quickly otherwise the dealer is going to (mis)claim it's a major fault
& offer a much lower trade-in value. At lower gears like S or L, I don't notice this 'coughing' (or perhaps it's not
noticeable), it's only at D gear that it's noticeable the last 1 week.
What are among the lowest cost components I could replace first?
Spark plugs or ? I just got the gearbox replaced about 1.5 months ago.
Is engine mounts the likely cause & if so, shouldn't it manifest in this 'coughing' at S or L gears as well?
Or how can I narrow down the root cause?