1984 BMW 318 rough idle when the engine is started cold

1984 BMW 318
149,000 MILES • 4 CYL • 2WD • MANUAL
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DONM47
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The problem I'm having is when i start the engine when cold it starts fine, but when the car is setting there idling it begins, after about 30 seconds, to start running rough and the idle starts going from 1500 rpm to 500 rpm. It sometimes dies and I precede to start the engine again and it still does it. This goes on until the engine starts to warm up then everything is fine. What could be the problem because I've checked just about everything that the manual tells me to do. Thanks
Oct 13, 2008 at 11:48 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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