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7/25/01

  • HI Jon,

    Great website!! You know your stuff really well. I have a question for you, I
    have a '86 MB 560SEL and at low idle speeds (like sitting at a light) the oil
    pressure fluctuates and the engine cuts off. Could you help me with my
    problem, this is becoming very frustrating.  Thank you
    Terry

 

  • Thanks for the email. There are a ton of things that could cause your problem or problems. The first thing to check in the overvoltage protection relay fuse. The relay sits in between the firewalls in the engine compartment. Find the brake fluid reservoir, then go towards the center of the car, the relay is silver in color and has a red 10 amp fuse in it. Make sure the fuse is good. The next most likely thing to check is the idle air valve located next to your distributor cap. It has cylindrical shape with a two prong plug on it. You cannot really service this item, you may have to replace it. The idle is controlled electronically, There are many things to check first, almost to many to list here. Check those things and let me know, And one more thing, make sure you have good strong battery voltage. JON
 

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