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E30 (1982 - 1993)
God's Chariot. The E30 was produced primarily from 1982 through 1991. The cabriolet was the one exception which was produced through 1993.

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  #1  
Old 06-10-2013, 09:03 AM
nateybimer nateybimer is offline
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84 325e REALLY STRANGE PROBLEM

I have a 325e built in 8/84
I have to recycle the key 6or7 times before i can get it to rev above 1000 rpm. After it finally starts it runs fine until i shut it off. Then i go thru the key recycling again to get it to run. I put a vacuum gauge on the reg port and noticed the vacuum was only 10hg during the starting issue. When it starts running ok, the vacuum jumps to 18. ANY HELP PLS
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  #2  
Old 06-12-2013, 06:11 AM
Chaunceton Chaunceton is offline
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Mein Auto: 1989 325i
84 325e REALLY STRANGE PROBLEM

What do you mean by recycling your key?


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  #3  
Old 06-12-2013, 04:56 PM
nateybimer nateybimer is offline
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You have to start the car then shut it off at least 6to7 times before it will rev beyond a 1000 rpm. Once it does it will run fine until you shut it off. Then the same thing happens all over. It makes no sense to me..thanks for your reply.
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  #4  
Old 06-12-2013, 07:25 PM
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hornhospital hornhospital is offline
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My guess: Leaking injector(s). It's flooding when you shut it off. "Cycling" the key eventually burns off the excess fuel, but it would probably clear out if you let it run at idle long enough.
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  #5  
Old 06-12-2013, 08:08 PM
nateybimer nateybimer is offline
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That could be it. I hooked up a fuel pressure gauge after the filter earlier today. The press was 42psi. I checked it a few hours later and there was no standing press. I'll try letting it idle for awhile and see what happens. THANKS HORNHOSPITAL...
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  #6  
Old 06-12-2013, 08:57 PM
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hornhospital hornhospital is offline
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Good luck, bro. Report back with results.
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guessing gets expensive...drivinfaster
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Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #7  
Old 06-13-2013, 08:26 PM
nateybimer nateybimer is offline
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Back to the drawing board hornhospital. I put new injectors in today and its still does the same thing. I was planning on changing them anyway so at least that is done. Any other ideas, give me a holler...
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  #8  
Old 06-14-2013, 01:24 PM
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BMWFatherFigure BMWFatherFigure is offline
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Injectors new new or new recon? If possible quantify wher you are loosing fuel rail pressure, alternately clamp off the fuel return and measure than fuel inlet and measure. One or the other will stop the pressure loss. Work on from there.
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  #9  
Old 06-14-2013, 01:53 PM
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hornhospital hornhospital is offline
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Mein Auto: 1995 318is / 1993 325is
Isn't there a check valve between the pump and fuel rail somewhere? Maybe in the pump itself? The system is supposed to hold pressure for many hours after shut-down. Since it goes to zero pressure a short while after shutting it off, it's leaking somewhere. I was sure it was the injectors. Oh, well.
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Quotes to live by:
guessing gets expensive...drivinfaster
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Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
BMW-CCA #441426
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
HAVE I HAD MY MEDS YET?

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  #10  
Old 06-15-2013, 09:21 AM
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BMWFatherFigure BMWFatherFigure is offline
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It still might be. If my tests don't prevent the pressure loss that only leaves the injectors.
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Current:
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Previous:
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  #11  
Old 06-15-2013, 04:59 PM
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Mein Auto: 1984 318i
84 325e REALLY STRANGE PROBLEM

When you first checked the pressure didnyou just shut the car off? If so (seeing as you replaced all injectors already) then an idea of a leaky FPR might be an issue. It is the only thing that comes to mind where fuel could be going. Iirc there isnt any check valve in the system but there is a fuel flow damper but that is something different in terms of function.


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