Question about 1994 Ford F150 Styleside Supercab

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1998 FORD 4WD RANGER 128,000 MILES ENGINE LOST OIL PRESSURE OIL PUMP LOOKS GOOD NO SLUG IN OIL PAN, WHY?

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Its not the oil relief valve,since it only works when pressure is to high,and even then you dont lose all pressure.. look into the camshaft synchronizer having a broken drive gear at the bottom.they tend to break..working on one now that has this problem,so I know. luck to ya!

Posted on Feb 08, 2009

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Most likely your oil pressure relief valve located on in or nearby pump. Symptoms are oil pressure will drop when warmed up when idle lose all pressure eraticly giving the vehicle gas will bring back pressure and highway driving will bring pressure up until idle again.

Posted on Oct 18, 2008

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Posted on Jan 02, 2017

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You didn't post your engine size so please pick the one that works for you....I'll post them all separately:

2.3L Engine The oil pumps are not serviceable. If defective, they must be replaced.
  1. Follow the service procedures under Oil Pan Removal and remove the oil pan assembly.
  2. Remove the oil pick-up and tube assembly from the pump.
  3. Remove the oil pump retainer bolts and remove the oil pump.
To install:
  1. Prime the oil pump with clean engine oil by filling either the inlet or outlet port with clean engine oil. Rotate the pump shaft to distribute the oil within the pump body.
  2. Install the pump and tighten the mounting bolts to 14-21 ft. lbs. (19-29 Nm)

WARNING Do not force the oil pump if it does not seat readily. The oil pump driveshaft may be misaligned with the distributor or shaft assembly. If the pump is tightened down with the driveshaft misaligned, damage to the pump could occur. To align, rotate the intermediate driveshaft into a new position.


  1. Install the oil pick-up and tube assembly to the pump. If there is a gasket between the pump and the pick-up, use a new gasket when installing.
  2. Install the oil pan as previously described.

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