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Old 09-18-2007, 10:34 AM   #1 (permalink)
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Default Removing SAI

I have 2000 D2 with the most irritating system ever - Secondary Air Injection. Does anyone have any insight into removing the system without complications?

Here's my understanding how it works: The ECU turns on the fan/compressor/howling monkey when engine coolant temp is below a certain temp. It also opens 2 vacuum valves to let the air be blown on top of the exhaust valves in each head. The air combines with unburnt fuel, which is then burnt - all to lower emissions when the vehicle is cold.

Does anyone know anything different?

Here are my findings on removing it. 1. The fan is an electrically isolated unit with a 2-wire prong - meaning the ECU cannot be tracking its speed or verify its movement through that connection. The SAI adapters into the head are a simple pipe/pressure fittings, the only complication is that they are metric, making it hard to find caps. The vacuum valves seem simple to remove - just have to cap the lines going to them. The remainder of the system is pipes and hoses without any external connections.

Am I missing some link between SAI and other systems in the rover?

The SAI adapters (in each head) are made from some alloy. I'll check if its ferrous or not later today, but it seems like they can be welded shut and left in the heads.

Does anyone have any input?
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Old 09-18-2007, 06:25 PM   #2 (permalink)
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From reading the RAVE, I think the ECU senses the SAI is not working properly when there is no electrical load sensed when the SAI motor is activated. It will throw a fault code.
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Old 09-18-2007, 09:42 PM   #3 (permalink)
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Thanks!

An electrical load is easy enough to simulate. No other takers? Someone must have pulled this system out before!
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Old 09-19-2007, 06:00 PM   #4 (permalink)
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If you do pull it out, I wouldn't mind seeing a writeup with maybe a few pictures.

edit - there was a post on dweb a little while back about the SAI system. I think the only system check is done through voltage. I know it doesn't have any effect on cold start fuel trims because the system is set to run for a designated amount of time (71 seconds I think).

good luck!
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Old 04-28-2009, 10:06 PM   #5 (permalink)
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i want this to happen......


did you ever remove it...
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Old 04-29-2009, 07:04 AM   #6 (permalink)
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Why not just fix the" howling monkey" and be done with it.
You would never be able to pass a state emission, or by Federal law, sell it.
If you check with a good knowledgable Rover Master tech, I believe you will see you can't remove it without effecting the engine and it's performance.
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To DOWNLOAD the RAVE Manual, follow this link http://www.landroverresource.com/

Rover Radio issues or IPOD Adapters http://home.valornet.com/splacket/index.htm


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Old 04-29-2009, 07:23 AM   #7 (permalink)
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i always try and de engineer things on my vehicles..... i hate technology.....and plus i dont want to install the seconday tubes behind the manifold after i do my coils today
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Old 04-29-2009, 09:03 AM   #8 (permalink)
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Your avatar doesn't support your statement of hating technology!!
If you are doing your wires today, are you doing it with out removing your manifold?
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Retired service manager, member of Solihull Society, SCLR, NCLR and the Santa Barbara 4Wheelers clubs.
99 D2, 3" lift, CDL with Detroit,T.T. lockers, 4:11's,H.D. axles, custom ft/rear bumpers with sliders, a 9500 HSI Warn winch and 5 HID's.

To DOWNLOAD the RAVE Manual, follow this link http://www.landroverresource.com/

Rover Radio issues or IPOD Adapters http://home.valornet.com/splacket/index.htm


Need Parts?
paulgrant@mac.com or call 203-770-1699
willtillery@roverguy.com or call 434-251-9331
P.T. Schram 260-804-0458

Lucky8, http://lucky8llc.com/
British Parts of Utah, http://www.bputah.com/
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Old 04-29-2009, 11:43 AM   #9 (permalink)
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yes,

i'm not removing the manifold. no need to since the coils can be accessed with ease. putting the coils on the bracket 1 bolt at a time will be a lil hard... but nothing more that an hour of work to finish.

p.s. Ronny Stig is the man and he can do anything with out SAI or even saying a word..


SAI is pointless and although mine works fine... i dont want to clutter up my engine bay with it.
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Old 04-30-2009, 10:33 AM   #10 (permalink)
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So did you figure out how to disconnect it?
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Old 05-24-2009, 04:11 PM   #11 (permalink)
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Quote:
Originally Posted by tcpfl View Post
So did you figure out how to disconnect it?
x2... I may be tackling this problem as well as soon as I get new throttle linkage and other random broken things put back on the plenum so I can drive it again.

Quote:
Originally Posted by Disco Mike View Post
Why not just fix the" howling monkey" and be done with it.
Well, I can't speak for everyone but my reasons are:

1. Some of the tubing connected to it has completely disintigrated from heat and age, and there is no way I'm paying to replace such a stupid system.

2. I can't relocate my now non-existant washer fluid reisvoir because it is in the way (and I have reasons for not wanting a shitter pipe in front of the radiator).

3. I would have my truck back together and running again if not for that kludge of tubing (SAI) running behind/over/under where the plenum needs to go back in after changing out wires. Now I have to tow it 200 miles to a dealership. Not to mention how much easier the job would have been without all those stupid brackets in the way (I don't understand what sort of drugs a designer has to be on to think it is a good idea to bolt things to the side of the plenum that can't be easily moved out of the way).

4. So I can fix the vehicle myself without CARB-bullshit getting in my way (some of us don't have emission inspections, or any inspections for that matter). None of the local shops will touch it because they know the mess that is under the hood of one of these, and going to a dealership every time I need to do maintenance isn't an option all the way out here (see #3 above).

5. I'm grumpy over the fact that time and money lost fixing these problems is preventing me from getting a lift kit.



Thanks to secondary air and how difficult the design is to work around I'm now looking at 200 miles of towing on a flatbed, dealership parts and repair service for weird little plastic plugs that snapped off the plenum, throttle linkage (and perhaps throttle body depending on if they are considered separate parts or not), and being stuck without a vehicle for however long this all takes. When I get it back two things are happening: SAI is getting removed, smashed to pieces with a sledgehammer, set on fire, and I am buying a second vehicle.
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Old 05-24-2009, 05:25 PM   #12 (permalink)
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So Chazz... If you figure it out please share?
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Old 07-22-2009, 03:28 PM   #13 (permalink)
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Bump. Please let us know if you've managed to kill the CEL after SAI removal!
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Old 08-05-2009, 11:25 AM   #14 (permalink)
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Quote:
Originally Posted by tcpfl View Post
So Chazz... If you figure it out please share?
Yes, I purchased a AAA Platinum membership.
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Old 08-05-2009, 12:56 PM   #15 (permalink)
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What are you going to do to get around the ECU and more importantly the SAI heads.
Don't think it is an unplug and plat thing cause it isn't.
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Retired service manager, member of Solihull Society, SCLR, NCLR and the Santa Barbara 4Wheelers clubs.
99 D2, 3" lift, CDL with Detroit,T.T. lockers, 4:11's,H.D. axles, custom ft/rear bumpers with sliders, a 9500 HSI Warn winch and 5 HID's.

To DOWNLOAD the RAVE Manual, follow this link http://www.landroverresource.com/

Rover Radio issues or IPOD Adapters http://home.valornet.com/splacket/index.htm


Need Parts?
paulgrant@mac.com or call 203-770-1699
willtillery@roverguy.com or call 434-251-9331
P.T. Schram 260-804-0458

Lucky8, http://lucky8llc.com/
British Parts of Utah, http://www.bputah.com/
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