Random Stalling, Loss of Power, Hesitation, Knocking, 1980 450SEL W116

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Random Stalling, Loss of Power, Hesitation, Knocking, 1980 450SEL W116

11-08-2009, 07:45 PM

cth350

Registered User

Join Date: Dec 2000

Location: Long Island, NY

Posts: 4,449

CIS FI system...
Suspect the cold start valve being bad.
Start by disconnecting the electrical connector.

Buy a spare paper gasket for it and disconnect from the manifold. With the business-end of it pointing into something and also wrapped in a rag to contain any possible spill. Start the car. If ANY fluel escapes with the wires disconnected, you have your culprit.

Oh, and temporarily plug the vacuum leak caused by the disconnected valve.

Thx -CTH

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