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Can you tell me exactly where the EGR valve is located on a 2004crown vic police interceptor My check engine light has been coming on and off I think its dirty or going out

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Common problem with older Ford engines where the port that feeds the EGR valve gets clogged with carbon buildup. Most likely the EGR is located in the rear of the intake manifold with a vacuum line attached to it. If you remove the valve and find it blocked, you might be also looking at replacing the cat as well. Depends on how long its been bad.

Posted on Apr 18, 2014

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Posted on Jan 02, 2017

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SOURCE: Would faulty EGR valve cause check engine light to come on?

If EGR was out your engine light would stay on!usually hi way drive is a whole new emission game sensor work 100% different that city drive you have a O2 sensor problem don"t Get$$ the problem when if you say it only will do it on highway then take it on highway with OBD 2 in run scan mode have a passenger observe it this will give the the proper code you will need to peg it cheers!

Posted on Dec 27, 2008

ltfrc
  • 227 Answers

SOURCE: 2005 Crown Vic Police Interceptor: Starts then stalls

Have you checked the fuel filter. Fuel pump will pressure up, but fuel filter could be clogged and not work without the pressure of the fuel pump.

Posted on Jan 17, 2009

BPALepine
  • 61 Answers

SOURCE: auxilary power, electric windows, cigarette lighter and radio not working

Since all fuses are okay, I would start my trace from the fuse box and pick the easiest wire to trace which would probably be the lighter or aux. Check for any breaks in the line or any lose connections. It seems like a harness may be disconnected or cut.

Posted on Mar 23, 2009

468 Chevelle
  • 81 Answers

SOURCE: Service engine code indicates EGR valve.

You could have a restriction in the egr ports. remove the valve. Plug the holes, start engine. 1 hole will be blowing out exhaust, the other will have large vacuum.

Posted on Mar 28, 2009

  • 93 Answers

SOURCE: The EGR valve isn't getting the vaccum required to

what dtc do you have? is it p1401? if so the description is for insufficent air flow egr circuit. this is typicaly caused by a faulty DPFE sensor (delta pressure feedback emission) it is about the size of a buisness card and about 1/2" thick. its black and has a small wiring connector and 2 thick vaccum hoses hoing to it. Fords first step for repair for this DTC is to replace dpfe sensor and to assure hoses are not ruptured. i STRONGLY SUGGEST to use only factory sensors as it is often i replace new aftermarket ones that done work right from the start. this part is relatively inexpensive....good luck!

Posted on Jun 10, 2009

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Hello,
can you catch the check engine light while its on and scan for the codes? If you can get the code(s) i should be able to tell you exactly what the problem is. Do you notice if the vehicle heats up or does the coolant light just flash after 30-60 mins? It could possibly be your water pump failing or the belt that runs it. I would check that along with the codes. Please advise

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Here is a discussion of other possible causes:

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