Need help identifying part.

nooneau · Post by **nooneau** » 03 Mar 2018, 19:26

Part came apart, only spring left.
Would appreciate help.

Engine is hard to start, have to rev a little to get running.
Engine then runs between 600 and 1400 revs mostly in the higher range.

nooneau · Post by **nooneau** » 03 Mar 2018, 19:58

Post by **alschnertz** » 03 Mar 2018, 20:24

It might be listed on the vacuum hose routing sticker under the hood.

Hendo22 · Post by **Hendo22** » 05 Apr 2018, 01:30

Any problems you noticed with the car before you found this random spring??

Might be something from the thrttle cable? How does it idle? Do you have lag when pressing on the gas? Has the car died unexpectedly?

Hendo22 · Post by **Hendo22** » 05 Apr 2018, 01:31

Any problems you noticed with the car before you found this random spring??

Might be something from the throttle cable? How does it idle? Do you have lag when pressing on the gas? Has the car died unexpectedly?

PaddyM · Post by **PaddyM** » 02 May 2018, 06:35

I believe it's a a sensor or switch on the vacuum line that connects the brake servo to either/both the manifold inlet and the vacuum pump.
It's the dooby-whacker in this item on FCP.
https://www.fcpeuro.com/products/volvo- ... 0-30620958

I had an audible buzzing from the same part when I switched off the engine. On inspection I found the top and bottom piece starting to separate, which I fixed with electrical tape and a zip tie. That was 18 months ago now, and the brake servo still tests and works well.
Nice to see what the inside of it looks like though. Not sure if it some sort of a switch or sensor though.