Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

1991 5.7L TPI - Vacuum lines by distributor

Thread Tools
 
Search this Thread
 
Old Sep 13, 2018 | 11:51 AM
  #1  
jeffas000073's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 87
Likes: 1
From: Michigan
Car: 1991 Pontiac Firebird Trans Am
Engine: 5.7L TPI
Transmission: 4 speed 4L60/700R4
1991 5.7L TPI - Vacuum lines by distributor

Can someone please tell me what the vacuums line by the distributor in a 1991 5.7 (350) go to? There are several....some are a somewhat narrow type made of plastic that connect to rubber hoses and 90 transitions. When I was tightening my distributor clamp, I noticed them because they were in the way. There also seems to be some sort of mount for two of the lines to the right (passenger side) of the distributor. I couldn't figure out how to disengage the mount.
Reply
Old Sep 13, 2018 | 11:57 AM
  #2  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,740
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1991 5.7L TPI - Vacuum lines by distributor

The egr vacuum lines and hvac are next to the distributor.
the hvac comes out of the efi loom. The egr comes from under the Throttlebody to the solenoid then onto the egr.
Reply
Old Sep 13, 2018 | 12:00 PM
  #3  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,740
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 1991 5.7L TPI - Vacuum lines by distributor

Reply
Old Sep 13, 2018 | 12:16 PM
  #4  
jeffas000073's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 87
Likes: 1
From: Michigan
Car: 1991 Pontiac Firebird Trans Am
Engine: 5.7L TPI
Transmission: 4 speed 4L60/700R4
Re: 1991 5.7L TPI - Vacuum lines by distributor

Great....thanks!! Does anyone know how to release the mount holding the 2 lines by the distributor? I thought it would simply slide off, but it seems locked in somehow. I'd post a picture, but I don't have access to the car at the moment.
Reply
Old Sep 13, 2018 | 12:24 PM
  #5  
jeffas000073's Avatar
Thread Starter
Junior Member
 
Joined: Aug 2018
Posts: 87
Likes: 1
From: Michigan
Car: 1991 Pontiac Firebird Trans Am
Engine: 5.7L TPI
Transmission: 4 speed 4L60/700R4
Re: 1991 5.7L TPI - Vacuum lines by distributor

Check that......I just found a picture online of the same vacuum connector I'm talking about, but minus the attachment feature that is securing it down by the distributor.

Reply
Old Sep 13, 2018 | 01:36 PM
  #6  
Drew's Avatar
Supreme Member
iTrader: (58)
 
Joined: Jul 1999
Posts: 20,309
Likes: 1,064
From: Salina, KS
Re: 1991 5.7L TPI - Vacuum lines by distributor

The EGR solenoid bracket is sandwiched between the coil and it's mounting bracket on the intake. Remove the coil and it comes right off.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jstratouly
Tech / General Engine
4
Sep 12, 2014 09:21 PM
atc3434
Engine/Drivetrain/Suspension Wanted
3
Jun 19, 2007 10:58 AM
steve8586iroc
TBI
1
Mar 26, 2004 01:00 AM
86TpiTransAm
Tech / General Engine
13
Nov 27, 2001 07:18 PM




All times are GMT -5. The time now is 04:49 PM.