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Old 09-22-2013, 01:47 AM
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Join Date: Sep 2013
Location: Denver, Co
Car: 1989 BMW 325i
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Default 1989 BMW 325i Start and idle problems

Hello. I am hoping someone can help me here.

1989 BMW 325i has idling/stalling issues. Runs/starts/idles fine when cold, however when warming up, maybe 1/4mile or so, idle becomes erratic and most certainly will stall and very difficult to restart until cool. No Codes Ever.
Stomp test reveals normal. Replaced fuel filter and pump. New plugs. Cleaned mass air sensor and idle control valve. Tedious search for vacuum leak, none found. Coolant temp switch resistance 2.7ohms cold, 1.5 ohms hot. Ran seafoam to clean things up a bit. Tightened, lubricated, cleaned, cussed at, anything in the engine compartment that needed it. Replaced water pump several months back, temp gauge only shows about 9/16 on gauge. Cooling fan runs all the time. Bled cooling from any air lock. OK, I'm entirely lost here. Any and all suggestions would be most appreciated.

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