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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 08-13-2004, 12:20 AM
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hi everyone. Well, first off I'm an old school Z car lover but recently aquired a clean 1984 325e two door. So far I like the car as it gives me the necessary space that the two seater Z does not have. But she does have some problems that I'm hoping to fix as it's starting to get on my nerves lol ghead Anyway, here are the symptoms of the problems.

She starts ok first thing in the morning. But once I turn the motor off and let the engine sit for about 8-10 minutes, she becomes a real pain to start. It would take 3-4 loooong cranks while pumping the gas before she starts. Sometimes it takes 5 to six starts for it to kick over depending on how hot it is in Vegas...soo right now, you could imagine how hard it is to start in 110 degree weather The problem reminds of a bad vapor lock my turbo Z used to suffer from but my Z has been modified since then. Could it be a bad fuel pump? it does make a funny irregular humming noise...not normal humming noise but the, it's going to die soon kind of humm used Any other suggestions? Fuel injectors???

On to problem two. The car does this weird revving when it first warms up. The tach would go from 900 to 2000 rpm and would do this for 5-8 times before it settles down. I asked the PO about this and he told me that the car was "smart" and it's revving it self to warm up used he said if I drove it while it was revving, I would blow a head gasket. Now I'm not a dummy as I've personally worked on my turbo engine and have a basic knowleadge of how an engine works and something tells me that it's not normal...anyone else suffer from these symptoms?

Anyway, thanks for any help guys and I'm real excited about this car I know how tough the inline sixes are.
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#2 (permalink) Old 08-13-2004, 12:32 AM
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#3 (permalink) Old 08-13-2004, 12:40 AM
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The starting problem sounds like a combonation between your cold start valve and your main fuel pump. (keep in mind there are two in this car). The fuel pump will make more of a whinning sound to tell you it is dead. It is also a possibility that your thermo time switch is no good, and not sending the signal to your cold start valve.

The idle problem most likely has to do with your ICV (idol control valve). You will see a vac hose coming off of your intake boot, close to the throttle body. Follow that line to the ICV, chances are it needs to be replaced.

Here is a link that will give you every part you need to know and tell you where it is. It is a bit tricky at first, but once you learn how your bimmer works, it is really quite simple.

E30 Parts Database

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#4 (permalink) Old 08-13-2004, 09:23 PM
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#5 (permalink) Old 08-13-2004, 11:43 PM
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Thanks for the suggestions guys! I'll check out what you guys suggested and hopefully I can get her running the way she's supposed to.

Slvr E30IiS, I LOVE Z's too! Check mine out when you get a chance.


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