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2.7T - Secondary Air Injection Pump question

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Old 11-17-2007, 02:37 PM   #1
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Default 2.7T - Secondary Air Injection Pump question

I'm still working on resolving my two error codes:

P1423 and P1411.

My research on this forum is leading me to check the secondary air pump. Since I don't have the Bentley... can someone tell me if I am looking at the right part in the 2.7T engine (#1 in the picture)? Also.. what is #2 in the picture anyway?

If this pump needs to be replaced (and I know it's expensive), it looks pretty straight forward to get to, remove, and replace. Is there anything that I would need to look out for those of you who've done this job?

Thanks!

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Old 11-17-2007, 04:32 PM   #2
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Default see the corrugated plastic in your pic?

each end of that goes into its own valve, those are the SAI valves..

Not sure where the pump is, I'm sure someone else will lend their 2c
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Old 11-17-2007, 04:33 PM   #3
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Default that's the pump, you'll have to take y-pipe off & be careful of the vacuum tubes

around the pump, I seperate the pump from the bracked, it's not necessary, but makes it easier as to not break any vacuum tubes nearby. You can jump power right to the pump to see if it runs. What I usually see is the t-fitting breaking on the vacuum supply to the combi-valves. It's buried under the black plastic intake pipe.

#2 is a PCV valve
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Old 11-17-2007, 05:09 PM   #4
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Default #1 is the secondary air pump, you are correct.

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Old 11-17-2007, 06:22 PM   #5
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Default Just remember to replace the two valves

that come with the Secondary air injection pump kit
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Old 11-17-2007, 06:36 PM   #6
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Default When I jump power directly to the pump... do I need

to be careful which way is positive and which way is negative? and btw... which is the positive contact? There's a solid (orange) and one that is stripped (red & yellow).

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Old 11-17-2007, 07:22 PM   #7
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Default red= +, brown= ground, it should blow out like a hair dryer on low speed roughly

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Old 11-18-2007, 06:01 AM   #8
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Default Did you check the tubes?

Mine had the same codes the other day. One small vacuum tube was broken. I just cut out the broken part and re-used it. $0 and 10 minutes fix.
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Old 11-18-2007, 01:30 PM   #9
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Default Is the motor suppose to blow....

air to the combination valves? Or is it suppose to suck air?

I jumped power and the motor works. Air flow is very strong! The air flow is towards the direction of the combination valves. Is this correct?

Also... is there a way to test if the amount of air flow is adequate/sufficient.

Next... how do I test the combination valves?

And I keeping reading about this solenoid thing... where the heck is it? What does it look like and where am I suppose to look in the engine for it?
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Old 11-18-2007, 01:38 PM   #10
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Default Its supposed to blow

Sounds like the pump is good..

Check to make sure that each valve can hold a vaccuum to make sure the diaphragms are still in tact

Make sure the plastic corrugated hose has no cracks/holes and double check the vac lines.

Someone should be able to help find where the solenoid is located, you should check the vac lines there too.
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Old 11-18-2007, 02:22 PM   #11
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Default the solenoid meaning the change-over valve for the combi valves?

You'll want to remove the plastic intake pipe leading to the Y pipe, and you can loosen the Y pipe and lift it up slightly. buried down there will be the secondary air change over valve supplying vacuum to the combi valves to open them so the pump can blow air through. Try to trace the silicone vacuum hose from the passanger combi valve to the T fitting at the valve. There's a good chance the T fitting broke.
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Old 11-18-2007, 02:36 PM   #12
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Default I'll kook there and see what I can find. Thanks!!

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Old 11-18-2007, 02:56 PM   #13
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Default I screen print this image of the SAIP system... and

made some arrows. Am I correct that...

the Red arrows is the air flow.. to the combi valve.
The Blue arrows is the vacumn line?

Also... my green arrow at the T (#14 in the pic) with the question mark (which I believe is what you are referring to)... what is it connected to? Also.. the other green arrows with question marks?

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Old 11-18-2007, 03:02 PM   #14
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Default yes, you want to look at where the blue arrows go to the T fitting

the valve is under the 2 exhaust temp sensors on the pass. side at the back of the intake manifold. I'm pretty sure the vacuum hoses are a grey silicone.
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Old 11-22-2007, 04:12 PM   #15
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Default #1 is the SAI Pump, #2 is the Positive Crank Ventilation Valve

#2 allows gases that blow by the rings to re-enter the intake. They very rarely go bad. Just make sure it is connected securely onto the intake y-pipe until it "clicks". There is an O-ring inside to hel make the seal.
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Old 11-22-2007, 04:12 PM
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