Smog pump question
Thread Starter
Member
Joined: May 2014
Posts: 448
Likes: 0
From: Alpine
Car: 86 Trans Am
Engine: 305 LB9
Transmission: 700r4
Smog pump question
took off the alternator today and I'm waiting for the new one to come in. While doing it I saw the smug pump underneath and it's only driven by the WP. So I have a few silly questions about it..
can i I remove it with no delete pulley and the wp still work effectively?
Which parts of the associated tubing must stay or can be removed on passenger side of engine?
will it trip the cars computer? Thanks
Joined: Apr 2000
Posts: 3,938
Likes: 99
From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: Smog pump question
The waterpump is gonna turn regardless if the smog pump is removed or not. You should be fine. Plug the AIR tubes in the manifolds and you'll have to cap/plug/crimp the tube to the Cat Con. too.
Your really not gonna gain anything buy removing it all....and the legal stuff too. JMO
Your really not gonna gain anything buy removing it all....and the legal stuff too. JMO
Member
Joined: Aug 2010
Posts: 478
Likes: 4
From: Las Vegas
Car: Fourth Gen '94 camaro
Engine: 350 Gen II
Transmission: A4
Axle/Gears: 3.23
Re: Smog pump question
smog pump is a little/small load to the motor that AFAIK doesnt hurt performance enough to measure it. Your plumbing for the smog pump looks to be regulated by the ECM. Unless your sure the constant airflow from the pump will not be needed for your stock tune (air injection is stopped when not needed) then without it you should retune the ECM.
What im saying is once your ready for an ECM retune then removing it makes sense. If your not modifying the motor much and have no plans to retune for performance then I think its best left alone.
What im saying is once your ready for an ECM retune then removing it makes sense. If your not modifying the motor much and have no plans to retune for performance then I think its best left alone.
Thread Starter
Member
Joined: May 2014
Posts: 448
Likes: 0
From: Alpine
Car: 86 Trans Am
Engine: 305 LB9
Transmission: 700r4
Re: Smog pump question
Thank y'all! I didn't look to thoroughly and I believe it may be hooked to the ECU so if I do remove it later I will be when or if it's retuned.
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Smog pump question
There are no codes related to the Smog Reactor. If you want to remove it go ahead. The computer will not care.
GD
GD
Moderator
Joined: Jul 1999
Posts: 17,262
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Smog pump question
The smog pump is just an air pump. It's main purpose is to push air into the exhaust during engine warm up to help lower cold engine emissions. After the engine is at operating temperature, the smog pump does nothing.
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Smog pump question
Also - if you use a modern OBD-II cat, they not longer need the air injection to function well. Though it's still mandatory in some jurisdictions - if you only need to pass a sniff test then a more modern cat will handle the emissions without the use of the smog pump.
Removing all that makes the engine much more accessible.
GD
Removing all that makes the engine much more accessible.
GD