So, I have been chasing a problem with my 1987 240 GL for about a week. She was having some real trouble staying running once she started... ran for about 3 seconds! Checked the fuel pump fuses, replaced plugs, cap, rotor, and wires. Was just about ready to call the shop, when I read a post about a similar problem which others pointed to the AMM.

Came home, went out to the beast and unplugged the AMM and she started right up and stayed running. This was a HUGE improvment. Couldn't drive it anywhere, of course. Putting it in gear and giving it some gas promptly killed it.

So, unless someone else has a better idea ~ and I am open to suggestions and advice ~ I think I am replacing an AMM real soon now.

Couple of questions...

1) Is this just a parts swap or is this something which must be calibarated or adjusted once installed?

2) Is it better to just bite the bullet and buy a new one or is this something to check the boneyard or parts puller for?

3) seems like a pretty easy part to replace - any caveats, warnings or advice?

4) what causes a part like this to fail - Age or something else to look at? (note, the car has 130K on it...)

Thanks to all, in advance!