Question about 1998 Ford Expedition
I just worked on 98 expedition 5.4l had code PO354. This code refer to an open primary coil winding, open wire, or bad PCM.
Check primary winding with ohm meter should be from 0.5 to 1.5 ohms and about 2.5 ohms with a hot engine. check wiring with a noid light, run the engine and shake the harness if light goes out repair harness you should have battery voltage with key on the computer controls the ground side.
Posted on Dec 09, 2009
It refers to the coil circuit , dependind if you have coil on plug or not
Posted on Jul 01, 2009
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
PO302 is being a misfire, could mean the plug is bad or the coil is bad for that cylinder. Which can give you the misfire reading and the system to lean codes. Check the #2 coil for firing.
Posted on Feb 28, 2010
Tips for a great answer:
Sep 23, 2016 | 1999 Ford Expedition
Aug 06, 2014 | 2000 Ford Expedition
Feb 22, 2014 | Cars & Trucks
Dec 03, 2012 | Cars & Trucks
Apr 19, 2011 | 1998 Ford Expedition
Feb 03, 2011 | 2000 Ford Expedition
Oct 06, 2010 | 1998 Ford Expedition
Jan 28, 2010 | 1997 Ford Expedition
Jul 02, 2009 | 1998 Ford Expedition
Dec 21, 2008 | 2003 Ford Expedition
1,619 people viewed this question
Usually answered in minutes!