Question about 2003 Mercury Grand Marquis
Posted by Anonymous on
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Posted on Jan 02, 2017
Here is the information that you need:
Enter this Pinpoint Test only when directed here.
The use of a soap solution, such as SNOOP, around the fuel filler cap or the use of the hydrocarbon emission analyzer to determine an evaporative emission system leak is not recommended. The mandatory Rotunda Evaporative Emission System Leak Tester for OBD II (including the ultra-sonic tester) is the only device to be used at this time for evaporative emission system leak detection.
This Pinpoint Test is intended to diagnose the following:
Posted on Sep 26, 2009
its the tube going from the egr valve to your exhaust it have carbon build up and you either have to replace it or get a metal coat hanger and clean it out.
Posted on Sep 26, 2009
The best answer that you can get depends on how mechanically inclined you are and how bad your problem is on the car.
If you are lucky, you can buy a A/C gauge and minimum hoses and refill the system at the low pressure fill back by the firewall around the black oblong tank with the hoses on it. You follow the instructions and add Freon until you get a steady pressure in the correct temperature range. Too much is as bad as too little. On Fords, I have replaced the Low pressure switch first and been alright with the remaining Freon.in the system.
If you are not lucky, you may have to add oil to quiet a noisy compressor or you may have a bad electric clutch or leaking hose or component. There is a neat ultraviolet kit with leak detector, uv penlight, and enough juice to do 4 tests. It is available at Autozone. But you still have to fix the problem when you find it.
If your system is open, degassed, and you have to refill it you can rent a Vacuum motor to prime the system , you can do it at Autozone. It takes a significant deposit for the machine and then you get a full refund when you return the machine. Oreillys may have one too.
If you have friends or coworkers, they can tell you about the bad or good places for this service. It is really an unknown. About all you can look at is the Labor cost per hour. Good Luck
Posted on Apr 05, 2010
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