SOURCE: 2004 Lincoln LS A/C Valve
In order to charge, you must locate the low pressure valve to install the refrigerant. The low pressure valve is between the compressor and the evaporator. Do not charge on the High Pressure side, The high pressure valve is between the compressor and the condenser. To locate the low pressure valve, follow the line that comes from the compressor and routes toward the firewall. The valve will be somewhere on that line. Do not overcharge. The amount of pressure that is needed on the low pressure side will depend on the ambient outside temperature.
SOURCE: My 2004 ls lincoln 2004 ls is rough sometimes only
The air filter should be changed frequently. The Lincolns have longer warranties than most cars.
You might want to go to a dealer and see if you still have warranty left.
Some parts will cause idle problems and not set off the Codes. You may need the idle adjusted. Your car may need the EGR passages cleaned under the airhorn. Sometimes on all cars the O2 sensors operate within approved range, but when 2 of them are combined they work against each other.
A dealer can run a diagnostic for spark and fuel pressure to insure peak performance.
Testimonial: "hey , thank you! The car sstill in waranty until December. I already made an appointment. We'll see what happen."
SOURCE: 2004 Lincoln LS won't accelerate at 60mph, dies
Why would a dealer not be able to find the issue?
Start by checking codes.
If you have to, drive with a scanner,not a code reader on it,to capture data.
If it only has issues when turning the steering wheel and is speed related with the turning, you have a place to start.
I assume the dealer did all that.
I have a 2004 V8,so let me know, what help you need.
SOURCE: how can i find the keypad code on my 2004 lincoln
In the grey folder with your owners manual,is a white card with the factory code,for the keyless entry keypad. It also, tells you, how to put in your own code
SOURCE: my 2004 lincoln ls air conditioner is blowing hot
Your issues can not be answered easily or definitively, as the LS is very complex and all electronic.
I would need the stored codes,that set the check light (MIL Light)
You can cycle the right dash display to ACFilter and Reset,with the top row of buttons,in center of dash. There is no sensor on the Cabin Filter. All the dash displays, are just reminders,you can set any way you want, % wise.
Possible issues--Fuses
-- Coolant control valve
--DATC module
You will need a really good Technician,not a general mechanic, to diagnose your problem
You need to put a professional scanner on it, to start any diagnostic work
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