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My comany has a 1994 Ford f350 diesel truck. The truck runs great, starts right up everytime, but as soon as you take your foot off the accelerator the oil pressure drops, as soon as you press the acc

Pressure gage drops when accelerator not pressed as soon as you step on accelerator pressure returns to normal?

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  • Cars & Trucks Master
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Have the oil pressure checked with a special test tool, you may have a defective oil pressure sending unit. If the pressure is low then you have other more serious problems and the truck should not be driven until the oil pressure issue is resolved, low pressure will destroy the engine if left unrepaired.

Posted on Apr 18, 2013

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Posted on Jan 02, 2017

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landsend
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SOURCE: diesel engine oil pressure 06 powerstroke 6.0

replace your oil pressure sensor and have a mechanic do a oil pressure test.

Posted on Mar 24, 2009

gabndan2
  • 35 Answers

SOURCE: No oil Pressure, with knock. then oil pressure returns after turning off engine for a few minutes and cranking back up again.

is oil filter clogged???

Posted on Jun 01, 2009

  • 1 Answer

SOURCE: 1999 Dodge diesel truck hard to start

had this same problem for a month. tried new batteries...didnt work. tried new terminals...didnt work. finally talked to mechanic he checked and the starter was bad...had it replaced....Perfect, works great...fherr

Posted on Aug 26, 2009

  • 1374 Answers

SOURCE: 94 f350 7.3l turbo diesel looses oil pressure as rpm increase

Before you spend money on a new gauge. Get an oil pressure testing gauge for $20 , remove the oil pressure sending unit and test the oil pressure. If oil pressure at idle and 3000 rpm's is a-ok via spec's ( big money repair items) then its either the gauge a clogged or defective sending unit or the circuitry. (little money repair items)
You can also have this done at a repair shop.

Posted on Apr 26, 2010

gh20s
  • 343 Answers

SOURCE: The oil pressure gauge in my 2002 Duramax Diesel

That is normal. As you accelerate and rpm's increase the oil pump rpm increases. I think the oil pump runs 1 to 1 or 2 to 1 with the crankshaft rpm. Check the oil and inspect for any visual leaks if the gauge does not operate like that consistently. If it is intermittent or it just started acting that way, the sender my be bad. Other than that any Chevy Dealer will say that is normal.

Posted on Jun 01, 2010

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