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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 10-20-2011, 05:19 AM   #1 (permalink)
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secondary air pump

i have a 316 1.9 2001. 191,000 miles. recently had a problem with running sluggish. now fixed cleaned maf. (from advise on this website) now runs sluggish for the first 2 mins only? spotted a leak on the secondary air pump also has a whirring noise. when the whirring noise stops seems to run ok. now sealed the secondary air pump by replacing the rivets with bolts. but doesnt seem to fix the problem. i have the feeling my secondary air pump is kaputt. but i am not sure if this is supposed to be like this? dont want to change it and find its supposed to be like this. can someone give me some advice please. have recently changed spark plugs and leads as well.
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Old 10-20-2011, 02:50 PM   #2 (permalink)
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Originally Posted by benko View Post
i have a 316 1.9 2001. 191,000 miles. recently had a problem with running sluggish. now fixed cleaned maf. (from advise on this website) now runs sluggish for the first 2 mins only? spotted a leak on the secondary air pump also has a whirring noise. when the whirring noise stops seems to run ok. now sealed the secondary air pump by replacing the rivets with bolts. but doesnt seem to fix the problem. i have the feeling my secondary air pump is kaputt. but i am not sure if this is supposed to be like this? dont want to change it and find its supposed to be like this. can someone give me some advice please. have recently changed spark plugs and leads as well.
The secondary thingy operates using the coolant temp to slide the valve into a position where it allows more/less air... This must be not working as it should and needs removing for a good clean... It may have been fouled up by mirky coolant !! HTH
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