OK, I bought a new switch. I was surprised that the part was not named a throttle valve switch as it is called on the service CD. The label on the switch says it is a 'switch overload protect' 201 540 56 45.

I though I would also replace the intake manifold gaskets and O rings. Has any DIYer done job 14-450? How long does it take?

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1989 420 SEL