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Should I take off the metal ducthose from the exhaust to the AMM?? 200 1993

posted by  B.C. on  Mon Jan 10 10:30 CST 2005
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last visit: Wed Mar 28 22:28 CST 2012
[RELATED]

Inside the air filter box is a large flap, controlled by a temp-sensitive device. When the incoming air is warm enough, the flap moves to close off the duct hose from the exhaust preheater.

OK, AMM warms up quicker, EPA is happier, and your emissions test folks see the hose hooked up and are happy with that.

It's the temp-sensitive device that fails. It quits with the flap fully open to heated air, sending the AMM to the toaster. Everything looks nice, so the above-listed folks are happy, but you own the dead AMM problem.

Solutions: (1) Disconnect the air hose at the exhaust heat area. Hook it up for your emissions test - if they check that in your area. (2) Install a block of wood in place of the temp-sensitive device so as to keep the flap closed all the time. (3) Install a new temp-sensitive device. Same labor as #2, will need another replacement in the future.

You choose. Protect the AMM.

Good Luck,

Bob

:>)
--
240s: 1986 244GL, 1988 244GL, and 5 others.






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