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1992 Buick Roadmaster Question: oil is new and full,during idle oilpressure drops and engine idles rough, stalls

 

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Duvel, Hialeah, FL, June 10, 2012, 10:47
 Rookie

at, speed runs well, just during idle, oilpressure drops, engine idles rough and stalls.

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    Greg's Orange Auto (12984 Answers) , Orange, CA - (714) 361-9386
    globalhelper June 10, 2012, 13:03
     Master

    you may have a plugged oil pic up in oil pan,do manuel oil pressure test to confirm gauge is correct

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    Duvel, June 11, 2012, 03:51
     Rookie

    Thanks for your help,Globalhelper, I just purchased this Buick. I need to know the true condition of the engine,if there was odometer tampering,is there an engine diagnostic that will tell me the true state of engine health? I don't want to just start changing out parts on a wild goose chase...this oil pressure issue could mean an engine overhaul and this is frightening.What is the cost of diagnostic? If engine needs overhaul, what is that going to cost?

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    globalhelper, June 11, 2012, 05:40
     Master

    take it and get a compression test and leak down test to determine the condition of the motor and ask alot of questions prior to getting diag. ask for oil pressure test a motor could cost upwards of 3500.00

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    Duvel, June 24, 2012, 06:48
     Rookie

    My 1992 Buick Roadmaster Estate wagon has 50,000miles, has a slight idle tremor while stopped.At first it would idle under 500 rpm's and the oil pressure would drop below 20, then eventually stall, while I had my foot on the brake. If I placed in neutral the idle would be a bit better, but could still feel the tremor. I replaced old sparks with new, the tremor is better but noticeable.Could it be the timing chain?, what is the cost of repair?

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    woody4266, January 01, 2014, 08:36
     Rookie

    It sounds like you could have a vaccume leak in the brake booster sys.

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