After years with the same English speaking mechanic I finally got fed up and started to try new ones. He was cheap and occasionally fixed things, but more often failed.

After several dead ends - a lot of places refuse Peugeot or give up quickly - I found one who quickly identified and fixed my perennial idling/sensors problem. As it turns out - according to him - the mass air flow sensor wasn't bad, it was some kind of electrical problem such as a short or solenoid or something (language barrier). The car runs perfectly now for 500 baht. 

I also had him fix several other minor but time-consuming things (air-con blower switch, door locks trouble) - also only 500.

Couldn't be happier, hope the fix lasts! 

Perseverance pays off.

3 hours ago, VocalNeal said:

Perseverance pays off.

Agh as I feared it's not fixed. It worked perfectly for one or two days, but today it's back to 1) very high idle (2000 rpm), 2) occasional split-second faltering during acceleration. The only thing that seems to be better is so far zero dying at stoplight. 

Ah well, no magic bullet, it's just a Peugeot. Too bad as I was really enjoying having it back - so much more comfortable than my other cars.