1999 Dodge Durango Oil pressure

RRLUCE77

MEMBER
1999 DODGE DURANGO
4.7L
V8
4WD
AUTOMATIC
195,000 MILES

My 99 Durango with a 318 V8 is completely dropping oil pressure. I have just changed the oil pump and cleaned the screen. Drove it to the store and still dropping pressure all the way to 0 psi. While your driving down the road the pressure is normal and up around 40psi but when you come to a stop at a stop sign or something it drops out. Then you hit this accelerator to take off and oil pressure goes back up to normal. Any help will be greatful! I have to leave from Texas to be at work in Virginia in two days!

Sunday, September 6th, 2015 AT 10:49 AM

1 Reply

CARADIODOC

MECHANIC
34,330 POSTS

This was a real common complaint in the '90s but I never ran into it on a 4.7L. It was caused by a defective oil pressure sending unit. The first thing you should have done was to measure the actual oil pressure with a mechanical gauge. If THAT showed low oil pressure, the first suspect would have been worn engine bearings. Oil pumps do not fail intermittently although a broken pressure relief spring can cause varying pressure.

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Sunday, September 6th, 2015 AT 8:19 PM