schilke.... it was a generalized answer. Pertaining to an exaust code. I was merely giving some knowledge...
As for it quoting what I said in another topic... get over your self. Knowledge is knowledge. If you have a code for a secondary air problem there is more than just two explainations for that. Yes you have an air pump.. you also have a charcole canister that could lose pressure due to a leak from a vacume hose and or cracked lower ring. You could also get air traped in in the import side of your first vacume valve after the pump. Thus not allowing air to circulate. Next.. there is a re-occuring problem with the difference between an exaust manifold leak; as in a failed exaust gasket either between your headers and your cat, or your headers. AND a loss of pressure in cylinders 1-3 and 4-6. It all depends on which one your OBD picks up first. So if your getting a "Pressure low in cylinders 1-3 and 4-6" then it is one of two things. First it could be either that your vacume valve is stuck closed not allowing a push/suction of air to vent and be pushed... or you have a leak in your exaust manifold and or your gasket between your cat and header. The exaust system codes for e36s are some of the more confussing codes to get because if something does happen and you get a code it is often hard to pinpoint what went wrong or what is going wrong due to the fact that if one thing fails in your exaust system... another thing will very quickly fail or be tricked into failing.
If you ask a generalized question... you will most likely get a generlized answer.
I have nothing against you schilke, just please watch what you say in post because people get offended very easily... keep up the good work and passing knowledge.
Please correct me if I missed something or am wrong in any way. Thanks.
1997 E36 M3 1990 E30 325i