1HZ 1991 vacume hose help

Submitted: Tuesday, May 26, 2015 at 14:52
ThreadID: 118986 Views:2352 Replies:3 FollowUps:3
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Hi All

Got a 1991 80 with 1HZ, there is a small / thin hose connected to a pipe at the vacuum pump, this hose runs up to a connection which has wires attaches, maybe some kind of a solenoid? (mounted on LH inner guard) then another hose from this connection is about 400mm long but goes no where and is open ended.

Is this correct / normal?

What is its purpose? and if under vacuum I would expect it should be connected or filtered???

Regards
Geoff 17
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Reply By: Crusier 91 - Tuesday, May 26, 2015 at 19:10

Tuesday, May 26, 2015 at 19:10
Go to:
www.offroad80s.com

It's the best aussie 80 series website.
AnswerID: 554279

Reply By: Member - Ed C (QLD) - Tuesday, May 26, 2015 at 23:42

Tuesday, May 26, 2015 at 23:42
I'm not familiar with 'Cruisers, but I'm assuming they have an 'idle up' diaphragm on the injector pump?? (increases idle rpm when air-con 'kicks in')

If so, my (flying in the dark) guess is that the hose you are describing is the vacuum feed for said diaphragm, and has come adrift from same...

If it's not that, then I have no idea.............

:)



Confucius say.....
"He who lie underneath automobile with tool in hand,
....Not necessarily mechanic!!"

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AnswerID: 554286

Follow Up By: Member - Geoff 17 - Friday, May 29, 2015 at 13:50

Friday, May 29, 2015 at 13:50
Hi Ed

well guessed

sorry for slow reply - I have been absent from pc

thanks for help
GN
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FollowupID: 840458

Reply By: BarryMcKenzie - Friday, May 29, 2015 at 12:45

Friday, May 29, 2015 at 12:45
G'day Geoff, I have a 94 80 series and I think Ed C is correct. Does the thin line from the brake vacuum pump go to a small solenoid looking object mounted just behind the fuse box?
If so the other thin rubber tube goes from here to the "idle up" diaphragm for the aircon on the injector pump. It has as Ed said probably fallen off. On the injector pump you will see a capsule about the size/shape of a bike bell with a line coming off that the thin tube will fit on to.
Mine was fitted but didn't work for years as the crank arm that idles up the revs slightly when the aircon is on was seized on the shaft and did not move when vacuum was applied to the diaphragm. Managed to remove the arm, clean up/lube the shaft and get it working again.

Hope this helps,

Barry.


AnswerID: 554371

Follow Up By: BarryMcKenzie - Friday, May 29, 2015 at 12:47

Friday, May 29, 2015 at 12:47
And by the way Geoff, the solenoid has a little filter mounted on it, black plastic thing about 5 cent piece diameter on side....
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Follow Up By: Member - Geoff 17 - Friday, May 29, 2015 at 13:49

Friday, May 29, 2015 at 13:49
Hi Barry

you and Geoff are correct I believe.

thanks for the help.

the old girl had a new pump fitted a while back and does not get much use so has gone un noticed.

I will add this to my long list of items over looked by "profesionals"

regards
GN
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FollowupID: 840457

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