Question about 1999 Lincoln Town Car
Since your problem can be caused by both fuel or ignition problems, you may have a fuel or emissions related problem. The power valve in a carbureted system is often the problem since it kicks in when you ask the car for power. Sometimes you have more than one problem like a plugged jet in the carburetor and a bad power valve in the carb.
It also could be emissions related. I would check the EGR valve and make sure that it is not opening too far and causing the engine to cut out. Try disconnecting it by blocking it to see if it is the problem. I had that problem on my car and I fixed it by blocking the EGR port with a thin piece of metal to troubleshoot it. Then I cleaned it out and put it back on and the problem was over.
Posted on Sep 12, 2009
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Posted on Jan 02, 2017
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engine and the automatic transmission (transmission control is only
for automatics, engine is still computer controlled no matter the
transmission type) in this vehicle are computer controlled and in
most cases when a fault occurs a fault code is stored in the memory
of the computer control module. There are exception to this, such as
the Mass Airflow Meter and fuel pressure problems. What must be done
is to have all the basic testing done such as a scan of the system
for fault codes as well as a check with a live data scanner tool for
engine functions that are not within range of normal, a trained
technician is required to know what is correct and what isn't, then
based on careful diagnostics done from a factory repair manual the
correct part is replaced or the wiring repaired or the computer
replaced (known as the PCM), which is very rarely the problem. Other
basic checks must be done as well such as mechanical problems with
the engine as well as engine state of tune and mileage on the engine.
The transmission can have mechanical issues as well such as no gear
engagement at all or a failed pump or other pressure related
problems. In addition have a fuel pressure leakdown test run.
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