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Show me your GROUNDS!

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    Show me your GROUNDS!

    So today was not fun. Went to grab lunch at noon and my starter just made a machine gun sound. The battery is fully charged and I have a brand new alternator.

    After popping the clutch to get it running (thank god these are light cars), I had a person pull up next to me and ask if I was in reverse. :-? I get out, sure enough no matter what gear I am in the reverse lights are on, that's new.

    Then tonight I head out to Ski Chalet, about a 30 minute drive into gaithersburg. 3 minutes after leaving the house I notice that my temp needle is PEGGED in the red. By this time I am :hitler: and :eeek: I got out, making sure not to shut the engine off because I know it won't start back up. I checked the coolant, level is OK and it is not boiling. Felt the hoses heading into the thermostat and out, hot out, cool in. :loco: Everything seems ok.

    I get back into the car, and the needle is now magically at the center. :loco::loco:

    The wife and I got her some new snowboard boots, I pushed and she popped the clutch to come home. The whole ride home the temp gauge indicated red, but was fluctuating up and down slowly as if the thermostat was opening and closing. I stopped and unplugged the temp sensor, needle shot to low, plugged it back in and it pegged again.

    Finally got home after a very quiet, very nervous ride and shut off the engine. For giggles I turned the key on immediately and what do you know, the needle is now at 1/4 temp.

    So, in one day, starter failure, reverse lights always on, and temperature sensor reading incorrectly. I checked the main ground on the front left of the block and it is ok.

    Where are all the grounds? Mind you I just put this engine in 3 days ago, and have driven it for 1 tank of fuel. The first time I started it I had the starter issue, but after messing with a few connections it fired right up... Until today.


    Also, I have 2 small wires that IIRC, were both hooked up to the trigger terminal on the starter. One doesn't seem to have an effect, IIRC it is a blue wire. Any ideas?

    Anyone? :(

    Edit to add: One of the past owners of this vehicle swapped it to manual.
    No E30 Club
    Originally posted by MrBurgundy
    Anyways, mustangs are gay and mini vans are faster than your car, you just have to deal with that.

    #2
    Think I may have found a resolve.

    Replacing your old ground cables is a prime example of one of the best preventative-to-cost ratio maintenance you can do for yourself and your e30. Why? Because if your body to oil pan ground goes out, your starter wont turn and you will be forced to push start or tow your car, and then you
    No E30 Club
    Originally posted by MrBurgundy
    Anyways, mustangs are gay and mini vans are faster than your car, you just have to deal with that.

    Comment


      #3
      the manual swap is probably why your reverse lights are all fucked up

      Comment


        #4
        Originally posted by Exodus_2pt0 View Post
        That is your problem. I had the exact same problem you are describing, including the bump starting part, and the temp gauge jumping around part.

        Its a bad ground. Replace the ground that goes from the top lip of the oil pan on the drivers side, to the drivers side body.
        Your resource to do-it-yourself and interesting bmw and e30 stuff: www.rtsauto.com

        Your resource to tools and tips: www.rtstools.com

        Comment


          #5
          Also if your cluster starts acting funky, check your ground behind it. There will be a bunch of brown wires going to a single nut. For some odd reason, mine was loose and that seemed to fix my problem. For a while, my temp gauge would magically shoot up whenever I turned my blower on and/or the lights. After doing my keyless entry install (and discovering the loose grounding point), I haven't had a problem since.
          1989 325i - 2.7i, Holset H1C, 60lb injectors, whodwho MS-PNP.
          2012 Passat TDI - DD Duty
          2008 GMC Yukon XL Denali - Kiddie hauler/grocery getter

          Comment

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