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      02-01-2013, 12:36 PM   #4
BimmerPost Supporting Vendor

Drives: 07335i
Join Date: Dec 2008
Location: Earth

Posts: 14,316
iTrader: (86)

The JB4 is off at idle and during cold starts, so its not doing anything. If there is a connection problem or bent pin that could cause some issues. Its difficult to say as you wouldn't believe the condition I see some used JB4s come back with pins missing, wires cut, etc.

Double check all connections and double check all JB4 wires are properly seated in connector, etc.

Mike is offline   Canada
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