Question about 1987 BMW 3 Series
Car runs good when cold 10 min or so it starts sputterings dieing and running bad
It's the automatic choke!
The choke is "closed" or barely open... When cold, the engine needs a RICH mixture (more gasoline, less air). When the engine warms up, it requires a LEAN mixture (less gas, more air).
It is probably creating BLACK tailpipe smoke ... that means unburnt gasoline. (Blue smoke is OIL, white smoke is WATER).
Put the parking / emergency brake ON.
1. Remove air cleaner assembly from intake, use a carb cleaner spray or throttle body spray cleaner and spray just a little. (AutoZone $5)
2. Find the accelerator arm under the hood.
3. start car, rev the engine to make sure how to operate the accelerator from under the hood.
4. Carefully spray into carb / throttle body and work the accelerator ... don't let the engine die...
5. Watch out for "backfire"... it may create a small flame out of the carb. It will extinguish itself in one second.
6. You may need to do this two, three times.
7. Add a "complete fuel system cleaner" to your next tank of gas ($8).
That's it! ... pretty cheap, too.
Hope this helps!
Posted on Sep 04, 2009
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Posted on Jan 02, 2017
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