Random Misfire code 2003 Ranger 3ltr - Ford Truck Enthusiasts Forums

Ranger & B-Series All Ford Ranger and Mazda B-Series models

Random Misfire code 2003 Ranger 3ltr

Thread Tools Search this Thread
Old 08-02-2011, 07:03 PM
joeg2246 joeg2246 is offline
New User
Thread Starter
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, 08:00 AM
pawpaw pawpaw is offline
Join Date: Jan 2004
Location: SW Va
Posts: 11,552
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 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.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Misfire... Grems4ever Modular V10 (6.8l) 20 03-18-2017 12:39 PM
Random Misfire ODGuy 1997 - 2003 F150 2 08-21-2016 08:48 PM
2008 misfire diagnosis help? Arctic AL 2004 - 2008 F150 1 03-23-2016 06:30 PM
1999 5.4 random misfire, chasing my tail Bootlegger's Deluxe Modular V8 (4.6L, 5.4L) 2 03-12-2016 08:51 PM
04 Escape Misfire and I've Tried Everything I Can Think Of payntertk31 Escape & Escape Hybrid 15 10-05-2015 04:43 PM

Go Back   Ford Truck Enthusiasts Forums >

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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -5. The time now is 03:43 AM.