Has anyone found a source for good quality rebuilt air mass meters for LH 2.0 240's? Fuel Injection Corp. (or something like that) used to sell them but the last couple I got (for almost $300 with shipping) held up for only two years of very gentle driving. Probably fewer than 20,000 miles on each unit when they failed. Symptoms were low power and hesitation, plus running extremely rich.

I started buying them from boneyards. They are used but they are only $75 with a 3-month warranty. I buy 2 or 3 at a time and put the others on the shelf. But the boneyards have dried up lately.

Yes, I am replacing the thermostat in the airbox every time I replace the AMM. I think the issue is just finding a decent quality reman. The originals didn't last very long either, from what I recall (60k-70k miles,) so perhaps it is just not a good design.