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Re: erratic idle 87' 528
I have an '88 535is which had the same problem, The thing that fixed the problem for me was replacing the fuel filter at the left rear of the vehicle right in front of the gas tank,if that isn't it take a look at the fuel injectors maybe run some injector cleaner through the car...i did...finally if the problem still isn't fixed check the distributer, plugs and wires (make sure they are gapped correctly and tight and all that)
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