I have a 1991 350 SDL which when at idle the oil pressure drops to zero, if i step on accelator it will slowly come back up to the top. It has been suggested that its time to replace the pump and go to heavier push rods.</P>


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any ideas?</P>


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I'm glad to know I'm not the only person concerned with oil pressure dropping at idle. I have a 1988 190E 2.6 with the same problem. When I hit the gas, the car dosen't seem to hesitate and the pressure needle comes right back up, even when revving the engine in idle. Weird. The mechanic that I bought the car from and I trust told me not to worry about it. But it does seem to be burning an abnormal amount of oil......about a quart every two months or so. It has 155,000 miles on it. It was in excellent shape when I bought it a year ago and I've taken very good care of it since. Any help on oil pressure and related items?

 

check your sending unit they can leak and will not be correct and theay also go </P>


bad alot. This is not good if the sensor is correct the lowest it should go it 1 or above 0 but not all the way to 0</P>

 

Zero PSI or Atmosphers at idle is not good. The cheapest place to start is the sender. If the sender is not the problem, then you probably need to replace the oil pump or the bearings. I am not sure what heavier push rods will do.</P>


TimK</P>

 

I Have the same thing , i have a 1998 SL 500 and recently moved ftom Boston to Florida and after driving for 20 minutes when car is idle gauge rop to 0 , as soon as i accelerate it goes back up to 3 , if i take it out on gar and leave at neutral it stay a tab over 0 , any help will be appreciated
Thanks

 

I have a similar problem. seems to be fine at start up but as the temp gets to operating temp the oil pressure drops to zero whenever i stop. will try the sending unit first.