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2002 mustang 4.6 oil pump failure

I have a 2002 mustang 4.6 i had ticking problem and no oil pressure. i replaced oil pump with high pressure pump new timing chain all from ford. i had great oil pressure i let the car idle for about an hour took it around for a quick test drive for about a minute then brought it back to garage and lost all pressure.. and ticking returned... does anybody know what couldve caused this?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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Bat1956
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SOURCE: Hyundai Sante Fe 2001 6 cyl. - no power; idle only

It may take as much as 60 PSI to overcome the fuel pressure regulator. No, you can't blow through it. I suspect you have a fuel starvation issue. It could be a clogged fuel filter. It may more likely be a pressure leak inside the tank. That pressure gauge you mentioned comes highly recommended at this point. There is a flexible line connecting the pump to the metal line in the tank. If it ruptures, you have only minimal pressure, and the vehicle starves for fuel. Using the gauge, turn the ignition on and off a couple of times, (do not start) If the filter is choked, you will still achieve pressure to overcome the regulator. If it never makes that much pressure, then it is the flex or the pump itself. My first experience with this I found the rupture after the third pump! Embarrassing!


If you find my suggestions to be helpful, please share with us some details so that others may benefit from knowing the whole story. Thank you!

Posted on Dec 30, 2008

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SOURCE: Oil Pressure

Oil Sending Unit

Posted on Feb 13, 2009

  • 1 Answer

SOURCE: I have an '02 jeep wrangler. Straight 6, 4.0 L

I have a 94 YJ gave me the same issues and I did all you did and more.
Finely I was told that penzoil has a parfin base which lends it self to the cause. I don't know if it is true or not I'm just a shade tree mech. I switched over to full synthetic and WA-LA It took a couple of changes after a good cleaning but I've been TICK free for a over a year now. since I do my own change it helps hold the cost down. I was also told I needed lifters and a rebuild & all that jazz so I figured that if she was gona die I'd deal with that when it happens so far so good.

Posted on Oct 05, 2009

  • 1 Answer

SOURCE: 2002 Ford Escape V6. Oil indicator light on, but pressure holds.

My 2002 Ford Escape had exactly the same problem as described. Dealer replace oil pressure sending unit (oil pressure switch) and problem still existed while leaving dealer about 3 miles away. I took the car back to the dealer again in two days and the oil pressure light kept of blinking sporatically all the way to the dealer. Dealer checked connections and they drove the car around and the oil pressure light never came on. I picked the car up from the dealer and I've had no problems with the oil pressure light flashing. I wonder if there is a microprocesser in the oil pressure sending unit which has to be given some time to be recalibrated to the cars main computer module?

Posted on Feb 02, 2010

  • 4369 Answers

SOURCE: how do i replace oil pump on 2002 ranger 4 x 4

engine size?

4.0L

Removal and Installation

  1. Raise and support the vehicle. For additional information, refer to Section 100-02 .
  1. Drain the engine oil.
  1. Remove the bolts and the oil pan.
  1. NOTE: All sealing surfaces must be cleaned prior to assembly. Use metal surface cleaner to clean the sealing surfaces.
    NOTE: Inspect integral oil pan gasket for cuts or damage that may cause leaks. Install a new gasket if necessary.
    NOTE: Fill the engine with clean engine oil.
    To install, reverse the removal procedure.

Posted on May 08, 2010

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