low to no oil pressure

1998 DODGE RAM
191,000 MILES
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DAVEKOILE
  • MEMBER
  • 1 POST
my oil pressure reads 40 lb. Most of the time, when i drive it the oil pressure drops to 0 lb. Il stop the engine and start back up again and it reads 40lb. My question is, DO OIL PUMPS TURN ON AND OFF. I DID REPLACE MY OIL FILTER and the pressure was better then ever.10min later it droped to 40lb and then back to 0lb. PLEASE HELP
Apr 27, 2013 at 8:04 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
before you get all socked about a motor going bad, check this with a manual pressure gauge it could just be the sending unit or an electrical problem. Oil pumps have a relief valve in them to maintain certain pressure with a good engine. Also I only recommend napa, Purolator, Bosch, or Wix filters.
Apr 27, 2013 at 8:20 AM
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