Restarts - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 09-12-2004, 11:55 AM
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[SIZE=1][SIZE=1][SIZE=1]If one would drive my 1988 325ic to the store, he/she would have difficult time restarting. It will start right up, but it will then spit and sputter leading to a stall. Turn the key off and it starts right up the second time and is fine…..any suggestions what needs fixed?
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#2 (permalink) Old 09-12-2004, 12:32 PM
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Fuel pump check valve.


I could replaced the fuel pump for $200 but I fixed the problem by putting in the fix from BMW for about $3.50,
part # "16 14 9 068 988"

Now the engine starts on first turn, hot or cold, overnight or after
standing for a while.

Diagnosis:

The check valve in the main fuel pump was leaking allowing the fuel injector rail residual pressure to bleed off resulting in formation of a huge fuel vapor bubble in the fuel rail and back down the fuel line toward the pump.

The extra cranking time was needed by the fuel pump to recompress and
eliminate the fuel vapor bubble in the line and repressurize the fuel injector rail.

Installation can be anywhere in the fuel pressure line but next to the main pressure pump is best.

It is a two screw clamp job.

Later,
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#3 (permalink) Old 09-15-2004, 06:25 PM
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Thanks a million...purchased part today!
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#4 (permalink) Old 09-15-2004, 06:36 PM
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where do u get this part and how many do u need?
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