Guess what this is!
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From: San Diego CA
Car: 88 RS Camaro,70 chevelle,92 Geo
Engine: 305 TBI
Transmission: 5 Speed Manual
Guess what this is!
i dont know what it is... iddle air valve? vacum regulator... heck idk
all i know is that if i dont cap it it my engine runs like crap.... but when i do cap it car iddles really low sometimes stalls when cold... once in gear and hot it runs fine... so im guessin its iddle air? thing is... wtf does it conect to?
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Joined: Sep 2011
Posts: 2,080
Likes: 34
From: Spring Hill, Fl.
Car: 87 iroc-z
Engine: 454
Transmission: th350
Axle/Gears: 3.73
Re: Guess what this is!
it appears to for intake vaccuum. maybe to the pcv valve? yea, thats gotta be a major vaccuum leak.
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Joined: Apr 2011
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From: San Diego CA
Car: 88 RS Camaro,70 chevelle,92 Geo
Engine: 305 TBI
Transmission: 5 Speed Manual
Re: Guess what this is!
nah pcv is hooked up allready... checked the vacum diagram for this car all is conected.. canistor pcv EGR... only thing not is the intake valve that switches from cold air to hot air... hot being from the intake manifolds... and the smog pump... but smog pump just sends hot gasses from manifolds to cat.. so ill worry about that later
Joined: Sep 2005
Posts: 27,819
Likes: 2,406
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Guess what this is!
It's just a fitting... the vacuum line that carries vacuum to the car's accessories (specifically, the HVAC control head) hooks up there.
Joined: May 2004
Posts: 5,335
Likes: 71
From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
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Joined: May 2004
Posts: 5,335
Likes: 71
From: Lexington, SC
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: Guess what this is!
Reconnect and/or replace the missing parts. A u pull it JY is a good source of pieces/parts and you can usually figure out how they back on after seeing how they came off. At least two near you: Ecology, and pick a part on energy way, both in Chula Vista, CA
Joined: Aug 2011
Posts: 661
Likes: 7
From: Texas
Car: 91 Firebird/88 Firebird/91 Formula
Engine: V6 3.1/V8 5.0/V8 5.0
Transmission: 4L60/700R4/4L60
Axle/Gears: 3.23/2.73/2.73
Re: Guess what this is!
On my 305 TBI that vacuum port goes to my MAF.
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Joined: Apr 2011
Posts: 351
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From: San Diego CA
Car: 88 RS Camaro,70 chevelle,92 Geo
Engine: 305 TBI
Transmission: 5 Speed Manual
Re: Guess what this is!
well on my engine diagram, the MAP goes behind the TBI... someone correct me if i am wrong
Joined: Aug 2011
Posts: 661
Likes: 7
From: Texas
Car: 91 Firebird/88 Firebird/91 Formula
Engine: V6 3.1/V8 5.0/V8 5.0
Transmission: 4L60/700R4/4L60
Axle/Gears: 3.23/2.73/2.73
Re: Guess what this is!
My bad...I meant MAP. I've got an "E" 305 TBI and I was looking as the vacuum routing diagram was set up.
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Joined: Apr 2010
Posts: 4,337
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From: Aurora, OR
Car: 87 IROC Z28
Engine: 355 cid TPI
Transmission: Custom Built 700R4 w/3,500 stall
Axle/Gears: QP fab 9" 3.70 Truetrac
Re: Guess what this is!
The MAP connects to a port at the rear of the throttle body. Sofakingdom is correct. That fitting is for accessory vacuum. If you don't use the accessories that it was connected to. Keep it capped.
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Joined: Apr 2011
Posts: 351
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From: San Diego CA
Car: 88 RS Camaro,70 chevelle,92 Geo
Engine: 305 TBI
Transmission: 5 Speed Manual
Re: Guess what this is!
ok i will... also... um... my smog pump... how do all those things get hooked up... is it just the air coming from the headers pumped to the cat.. or is it hooked up to the egr.. what i need i someone with a 88 tbi vin E just like mine so that i can take a look at there hook up... you see i got this engine torn apart... all ive done till date has been thanks to alldata
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