EVAP Without ECM?...
Thread Starter
Supreme Member
Joined: Sep 1999
Posts: 3,009
Likes: 815
From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
EVAP Without ECM?...
Can the EVAP system be set up to function without the ECM?
If so, what must be done?...
If so, what must be done?...
Joined: Dec 2004
Posts: 16,744
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: EVAP Without ECM?...
Hook the vacuum line from the evap to ported vacuum and delete the solonoid.
Thread Starter
Supreme Member
Joined: Sep 1999
Posts: 3,009
Likes: 815
From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: EVAP Without ECM?...
Wow, that easy? Thanks for the reply...
Joined: Jul 2011
Posts: 744
Likes: 5
From: Davison, MI
Car: 89 Camaro
Engine: Dart SHP 400-Holley Terminator EFI
Transmission: Tremec T56 Magnum F
Axle/Gears: Strange S60 3.55:1
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: EVAP Without ECM?...
Ported vacuum is above the TB, or before, so it's not a real vacuum leak. It would be working like a venturi in this application and since it is in the intake tract, it would just pull the vapors into the air stream
Joined: Jul 2011
Posts: 744
Likes: 5
From: Davison, MI
Car: 89 Camaro
Engine: Dart SHP 400-Holley Terminator EFI
Transmission: Tremec T56 Magnum F
Axle/Gears: Strange S60 3.55:1
Re: EVAP Without ECM?...
