Go Back   Ford Truck Enthusiasts Forums > Small Chassis Trucks > Ranger & B-Series
Sign in using an external account
Register Forgot Password?

Ranger & B-Series All Ford Ranger and Mazda B-Series modelsSPONSORED BY:

Random Misfire code 2003 Ranger 3ltr

LinkBack Thread Tools Search this Thread
Old 08-02-2011, 08:03 PM
joeg2246 joeg2246 is offline
New User
Join Date: Aug 2011
Posts: 1
joeg2246 is starting off with a positive reputation.
Random Misfire code 2003 Ranger 3ltr

I had the check engine light come on recently on my 2003 Ford Ranger 3ltr truck. The code was #2 cylinder misfire.
I replaced all the plugs and wires to no avail.
Today I had the code read as Random Misfire.
I measured the resistance from pin to pin on the coil and all my readings were less that 1.5 ohms. Is that a good reading?
I did a little reading and thought I might try some fuel injector cleaner. I went to the parts store and got some cleaner and added tha to a 1/4 tank of gas and then topped off the tank.
Can anyone think of what I might be trying next should this not work?

Reply With Quote
Old 08-07-2011, 09:00 AM
pawpaw pawpaw is offline
Join Date: Jan 2004
Location: SW Va
Posts: 9,430
pawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to beholdpawpaw is a splendid one to behold
Welcome to FTE.

I noticed you don't have any replies, so I'll see if I can get things started.

Post All of the trouble code Numbers.

Since it takes air, fuel, spark & compression to make em run & you've tinkered with the spark part, that sorta leaves the fuel & compression part, Unless Murphy's Law is messing with you, like a faulty new plug wire, or plug!!!!

Ford doesn't have a spec on the coilpack resistance value, but 5 ohms or less on the coil pack primary is normal & the value you measured sounds right. The secondary should be in the 13-15K ohms range & on a V6, cyls 1/5, 2/6, 3/4 are paired together in the coilpack, so measure across those two pairs for the coilpacks secondary resistance reading. If your still in doubt about the coilpack, most autoparts stores can/will bench test it for electrical output at no cost, but with the work you've done & info you've posted so far, I don't think spark is your problem.

Anyway, you might try listening to the #2 fuel injector & valves with a stethoscope, or with a piece of tubing, broom handle, long scredriver, ect, if you don't have a stethscope in your diagnostic kit, to determine if you can hear any difference in that area from the other cyls valves, or fuel injectors sounds, in time with the miss, if you can feel or hear it.
I'm thinking maybe a sticking valve, or an acting out fuel injector.

Let us know what you find.
99 Ranger XLT 4dr 4x2 4.0L 5spd Auto 3.55L/S Payload Pkg2 Tow Pkg

Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)

Our signature is a sign of a job completed, autograph your work with excellence
Reply With Quote
Old 08-07-2011, 09:00 AM

Similar Threads
Thread Thread Starter Forum Replies Last Post
5.4 random misfire HappyRanger 1997 - 2003 F150 5 02-21-2014 02:06 AM
Need help, running rough at Idle Troublecreek Ranger & B-Series 3 10-22-2011 12:58 PM
Yet another misfire thread fmjnax08 1997 - 2003 F150 10 02-02-2011 08:31 PM
4.6 Hesitation. Misfiring? mnjason Modular V8 (4.6L, 5.4L) 3 01-21-2009 12:47 PM
P300 code. Multiple cylinder misfire cobra870 Ranger & B-Series 12 07-21-2005 04:55 PM

Go Back   Ford Truck Enthusiasts Forums > Small Chassis Trucks > Ranger & B-Series

02, 1999, 2003, 2004, code, codes, cylinders, edge, ford, frod, misfire, misfirefordranger2003, misfires, multiple, random, ranger

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up Ľ

All times are GMT -5. The time now is 06:21 PM.

Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Fordģ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup