Question about 1999 Ford Crown Victoria
Engine code PO 354 comes up stating that number 4 cyl. was miss firing so replace coil and spark plug also tested for power while running and did have. So the decided to replace all plugs and coils and still have the miss fire problem.then check on line and it stated that need to check the dis ignition module which we can not find. can you please tell us where its located. Called ford but couldn't tell me
A P0354 indicates a problem on the primary side of the ignition system. (Control side not the output side). If it is a 99 you should have a coil on plug system. (Single coil for each cylinder) if this is the case and you replaced the correct coil (cylinder 4 is the very rear cylinder on the passenger side) then the coil is not getting a signal to fire. There is no deticated module or DIS that you are looking for because the PCM is what sends a pulsed ground to fire the coil. In order to check if the coil is getting a signal you will need a noid light which you can get at any auto store and a set is pretty inexpensive. Basically just a LED type of tester. You said you have power to the coil so If when running the noid light is flashing the PCM is sending a signal which means it's working. If the noid light stays illuminated then you have either a short to ground on the signal wire or the driver in the PCM is stuck to full ground. It is doubtful a PCM driver would be stuck closed as it would burn out rather quickly. If the noid light does nothing then you have an open on the signal wire or the PCM driver is shot. I have seen drivers burn out If regular tune ups aren't done. Hope this helps, Mike.
Posted on Nov 25, 2014
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: 2000 ford must. 3,8 L
Welcome to Fixya
Since you already replaced the spark plug and wires. This can be caused by a dirty, clogged or inoperative fuel injector; air leaks; or low fuel pressure because of a weak pump, restricted filter or leaky pressure regulator. Worst is you are having loose compression in your engine. Please see this article for your reference.
Thank you for using Fixya!
Posted on May 15, 2011
Tips for a great answer:
Aug 19, 2014 | 1999 Ford Crown Victoria
Apr 30, 2011 | Ford Crown Victoria Cars & Trucks
Dec 30, 2010 | 1997 Ford Thunderbird LX
Dec 18, 2010 | 2000 Ford Mustang
Sep 25, 2010 | Ford Crown Victoria Cars & Trucks
Mar 10, 2010 | 1999 Ford Crown Victoria
Dec 31, 2009 | 1999 Ford Crown Victoria
Oct 17, 2009 | 1999 Ford Crown Victoria
Jun 27, 2009 | 1999 Ford Crown Victoria
103 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: