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Still dealing with idle issues 1985 325e
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Originally posted by e30austin View Postyellow temp sensor handles cold start to 20c. if that switch fails, it's always thinking it's in open loop. BMW no longer sells a correct switch as a replacement for the yellow one. the purple is a sender only, no switch involved. the "fix" is to eliminate it because it's absolutely pointless.
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yes, there are 4, on the 325e.
- blue for coolant temperature up to 45c, the main fuel mixture control
- brown single pin for instrument cluster
- brown dual pin, thermo time for cold start injector
- yellow for coolant temperature up to 20c, dual pin, yellow top, this is the one you need to bypass
good luck'72 2002 pickup | '88 M5 | '89 330is | '89 M3 | '01 Z3M | '11 328xi-t
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Originally posted by e30austin View Postyes, there are 4, on the 325e.
- blue for coolant temperature up to 45c, the main fuel mixture control
- brown single pin for instrument cluster
- brown dual pin, thermo time for cold start injector
- yellow for coolant temperature up to 20c, dual pin, yellow top, this is the one you need to bypass
good luck
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Originally posted by e30austin View Postno. 15
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