2000 Discovery II, 92K

The last few days when my wife starts the LR in the morning the Secondary Air system sounds like a choking/dying cat. I started it up this morning to hear for myself and it is a very throaty, whiny howling type of noise. It predominantly goes away after the engine gets warm and isn't noticable from inside the car.

There was a code P1416 back on 4/14/08 that I cleared, but have not yet had time to clean the SAI system. This weekend looks like the weather and my schedule will allow me to work on this. Is it possible that the noise is due to a dirty system, or should I be looking for something else (new pump)?

Thanks

 

Yes, and I hgave heard of water getting in the system causing noise also.

 

Would the water be from condensation or is there a posibility of a leak from another system?

 

I cleaned out the SAI system and the noise is still there and now definitely sounds like it is coming from the pump. So, where is the best place to get an SAI pump (2000 Discovery II)?

Also, what is the procedure for taking the line/hose off of the bottom of the pump? There is a flexible hose that comes off of there with a connection I am not familiar with and I didn't want to torque anything too much.

On a side note, if the pump decides to completely die prior to a new one being installed, what damage would be done to the car without the SAI system, or should I tell my wife to not drive it until it is replaced?

Thanks,

 

 

Thanks for the suggestion on the WD-40. Worked like a charm.

 

Good deal, glad it worked for you too. Also, while you're at it do the same to the vacuum pump for the SAI as well. Only exception, don't unhook the lines and start it up or you'll get a fault code. Just spray a bunch in there, hook it back up and you're good. I do this every few months, especially due to getting water in the system from pressure washing the motor.
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My wife's SAI pump is making an bad noise now and she's had a fault code for > 1 year that our local mechanic couldn't solve (not a rover dealer). With the noise now very bad I have started to do my own research. I took off the SAI pump and made sure the filter was clean and was in good shape. My next step will ne to remove the control valves and clean and spray oil into the SAI pump.

Couple questions...

1) How does one go about cleaning the control valves - high powered air?
2) What is the "vacuum pump" that can also have WD-40 sprayed into... is this the reservoir?
3) What is the purpose of the solenoid? Is this to open and close something in the SAI?

I am going to have my wife get her code checked again. We just ignored it the last year but now that the noise is getting bad... got to address.

Final questions. Can I just unplug the SAI at the SAI Pump and drive the truck as normal (2003 Discovery 2)? Any potential damage? I live in Iowa so don't have emission checks.

Thanks.. that was my first post.