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European Shark
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Thing on cross-member
What's the valve-thingy mounted on the cross-member of my car? It has two thick tubes and two wires attached to it, and I just fixed a massive crack on the tube nearest to the engine and it didn't seem to change squat and the car was running fine before as well.
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1978 Porsche 928 Euro 5spd. Silver metallic/Black 1986 Porsche 928 S2 Euro 5spd. Meteormetallic/Grey. *Crashed* Owning a 928 is risky business - but sometimes you just gotta say "what the fudge". |
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07-22-2010, 03:28 AM
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Petie3rd
Join Date: Jul 2000
Location: Philly PA
Posts: 4,528
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that is a solenoid for bumping up the idle for the AC.
When the AC compressor is engaged it is also supplied from the same power source, to increase the idle so the engine wont stall
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^^^ Stan ^^^ 2019 BMW K1250 GS 2016 HD RK 1988 S4 Auto , Elfenbein Perlglanz, Pearl Gray 1982 5sp Met black and tan sport seats |
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07-22-2010, 05:33 AM
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What Merlin said. I actually disconnected mine as the valve was causing a leak so my idle was higher than normal, even with the A/C off. I've never had an issue with A/C and the idle since I unhooked it.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD** 
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07-22-2010, 06:59 AM
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European Shark
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So, since it had a massive leak that would be why my engine had unsmooth idling. It was simply sucking in ekstra air, and hence running lean?
Didn't notice it before you said so, but idle was high before. Around 1000 rpm and rough, and now it sits at factory rpm (750) and smooth as silk 
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1978 Porsche 928 Euro 5spd. Silver metallic/Black 1986 Porsche 928 S2 Euro 5spd. Meteormetallic/Grey. *Crashed* Owning a 928 is risky business - but sometimes you just gotta say "what the fudge". |
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07-22-2010, 09:26 AM
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I actually blocked both passages go to and from the valve. Sorry mis-spoke. I guess I can remove it altogether now.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior 1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
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07-22-2010, 10:56 AM
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1999 BMW 520i
1986 Porsche 928
