What is this part? Causing backfiring.

[Beehanger]

When I unhook this and cap it at the carb my backfiring stops.

I’m fully desmogged.

Curious where I can find a replacement . Doesn’t get 12v anytime even when running.

 

[bhsdriller]

looks like the fuel cut decel vacuum switch

Thread 'Decel fuel cut vaccum switch'

Mar 30, 2017

I'm trying to diagnose a very elusive mid-range stumble and am checking out the fuel cut stuff. The FSM is vague, to me, about how to test. It says to check for continuity between switch and body with the engine off and on, but it isn't clear (to me) as to the "correct" result. I think, from the pictures, that there should be continuity (a complete circuit) when the engine is off, but the circuit should be open when the engine is running. Right?

I get a closed circuit in both cases, so I'm assuming that indicates a broken switch, right? Anyone have source for a replacement...

• CurtB
• fuel switch
• Replies: 75
• Forum: 60-Series Wagons