Question about 2002 Audi A4

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2002 audi a4 oil pressure light issue

Hi guys.i have a 200 a4 1.8t. my oil light has been going on and off for over a week now.its not on all the time.today my mechanic put a new ol pressure switch and i drove the car for about 15 miles and it hasnt gone on yet. i know these engines are known for having an oil sludge problem. he did an oil pressure test and got the following results:
25 psi at idle with car warm
50 psi with car @ about 2000 rpm's ,but after seconds it dropped to around 40-45 psi.let go of the throttle and back down to 25 psi. what would you guys say?are those #'s good? any feedback would be appreciated.
thank you

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  • leo2008 Feb 14, 2009

    bunnydawg,

    I have the 4 cylinder 1.8 t engine on the vehicle.

    thank you

  • Roberta Smith
    Roberta Smith May 11, 2010

    14.5 lbs up to 72.5 is normal (all i could find is the specs 97 1.8 L)

  • Roberta Smith
    Roberta Smith May 11, 2010

    what size motor is that ? sounds abit low actually

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Hi
I have an Audi A4 1.8 1999 model and had the oil pump replaced but am still getting an oil alarm when driving.Engine makes a terrible noise , any suggestions would be appreciated

Posted on Sep 04, 2009

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THOSE NUMBERS ARE VERY GOOD, THE PROBLEM MOST LIKELY IS A DEFECTIVE OIL PRESSURE SENDING UNIT, HAVE REPLACED 100'S OVER THE YEARS FOR THIS SAME ISSUE, GREAT THAT U CHECKED THE PRESSURE THOUGH, IF THE LIGHT WAS INDICATING ACTUAL LOW PRESS U COULD HAVE WASTED THE BEARINGS IN THE ENGINE.

Posted on Feb 14, 2009

  • yadayada
    yadayada Feb 14, 2009

    those numbers are not low, the light is triggered at 10 PSI

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