Vacuum Help
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Junior Member
Joined: Mar 2009
Posts: 97
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From: OKC Area
Car: 90 Camaro Iroc-z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
Vacuum Help
I am working on a 90 Camaro 350 TPI. I just replaced the injectors and think I may have crossed a couple of vacuum lines. It is idling almost like it has a miss. Can anyone tell me where the vacuum hose from the throttle body goes to? Also, where does the line from the vacuum canister(behind drivers side headlight) go to? Also, the 2 lines that come off the EGR solenoid? I have following the vacuum diagram as best I can but want to double check. Thanks in advance.
Joined: Apr 2005
Posts: 7,736
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Vacuum Help
Top port is PCV supply air to pass side rocker cover
One vac line goes to the EGR valve under plenum;
the other is the supply vac
Last edited by vetteoz; May 16, 2012 at 07:24 PM.
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 97
Likes: 0
From: OKC Area
Car: 90 Camaro Iroc-z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: Vacuum Help
What about the vacuum line underneath the throttle body? Also what lines run to/from the check valve by the ignition coil?
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Joined: Feb 2010
Posts: 820
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From: OX CA
Car: TOO MANY
Engine: 350 TPI / 350 TBI/6.0L VORTEC
Transmission: T5/AUTO/AUTO
Re: Vacuum Help
egr soilonoid... one to the egr valve the other to underneath trottle body
Last edited by juanillox8; May 16, 2012 at 06:57 PM.
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 97
Likes: 0
From: OKC Area
Car: 90 Camaro Iroc-z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
Re: Vacuum Help
Got those connected correctly....where does the vacuum port on the MAP sensor go...to the fuel pressure regulator?? One more...where does the 2 lines from the check valve next to the MAP sensor go? Thanks
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