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  1. #1
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    Member No: 35162 AdamLowry is an unknown quantity at this point AdamLowry's Avatar
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    Hello 5er Board, gonna need some help here

    Good day Board,

    Have been working with a friend who has a badly misbehaving E34. It's your std. 535i with Motronic. Yet is has horrible running characteristics. First I'm taking care of the ignition system as it's original. Will test compressions, and clean as I go. Also will be replacing the valve cover gasket as it has been my experience to be a pain as it ages. I've been surveying the vacuum system, and it's in dire need of a full redo. While driving it has a run-away rpm issue. Do you think this may be related to the MAF ?. Could it also simply be vacuum leaks ?. What are this models deep, dark issues ?.

    Now all this being said, I've spent most of my time underneath BWM L-Jet FI systems with distributors. This system has a throttle plate, but no idle valve. It has the standard idle hoses, but what's with the diagnostic jack on the side of what appears to be an idle valve of sorts ?. I can't locate a cable for the throttle valve, so I'm taking it on faith there's a potentiometer somewhere ?. Or am I just missing something. There's also no electrical connections to the throttle valve package.

    If you guys don't mind, I'm going to poke around your archives and get schooled as quickly as possible so I can restore it's driveability.

    Any help would be greatly appreciated, and resources and advice gratefully welcomes.

    GB, A. <img src="http://perso.wanadoo.fr/claude.lecoq/BMW/logos/bmw728i.gif "

  2. #2
    prairieman
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    Re: Hello 5er Board, gonna need some help here

    you have stumbled into the E34 M5 board on Roadfly, arguably the least active M5 forum on the Web. Might try the E34 forum on this site, but I don't know how active they are. I do know E34 dot net is a popular site, that might be your best bet.

    Brad
    1979 635CSi
    1991 M5
    1992 735i

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