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Old 11-28-2012, 03:05 PM
phattle phattle is offline
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Location: US
Join Date: Nov 2012
Posts: 1
Mein Auto: BMW 749il 1998
Persistent code P1550 with check engine light

my 1998 740il just got a new (used) motor put in. It runs very well at normal speed. Idle a little shaky. So I replaced the idle control valve. Still gives cope P1550. New plugs. Already did leak test with sprays. Running out of ideas. Help! please
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