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E34 (1989 - 1995)

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Old 12-07-2009, 07:32 PM
direct44 direct44 is offline
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Location: orlando
Join Date: Oct 2009
Posts: 22
Mein Auto: 525i

ok, i did a transmission flush recently and replaced the spark plugs, but im having a problem with accerlation, it boggs down and vibrates while idling, i was thinking it maybe a ingition coil and cat converter problem any ideas, also how hard is it to replace the window motors in these things
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Old 12-08-2009, 12:13 PM
jenlex jenlex is offline
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Location: Breda Netherlands
Join Date: Dec 2009
Posts: 31
Mein Auto: BMW E34 540I
If your Cat convertor is the cause you can see it when the car is running look underneath your exhaust wil be really hot!If you hit the convertor and you here like something is loose then there is something wrong.But maybe one off the ignition colis is not installed properly?

It can also be that there is a vacuumleak somewhere.We always use brake cleaner to find it.If you spray it on the engine and suddenly the engine starts to idle higher then you have found it.

The power windows are easy if the wiring is in place.The mechanism is fastened with rivits and you have to drill them out and then replace the mechanisms.To check if there is already wiring for it check in the centre console.There should be a 2 connectors one black and one white.I thought black was for front windows and white for back.

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