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I have a 2000 1.8l with a manual transmission. It seems to run fine but P1136 keeps coming up. I will clear the code but after about 20 minutes its comes back on.
It also has a whining sound when you first start it up cold. It lasts for about 30 seconds or so, then goes away.
 

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Start with checking all of the vacuum lines and hoses. One is probably leaking. The whining sound is the SAIP. Eventually it sounds like a jet engine and after that it will fail. You would need to check the combi valve for proper operation and replace the pump when it fails.
 
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