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10-09-2013, 01:31 PM
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Join Date: Aug 2013
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Cold Temp Misfire
My 02 2.3l is missing when the truck is cold. Once it warms up, it runs like a champ. Coil pack is new and so are the plugs. Wires are just a few years old. Anyone know what it could be? Thanks
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Forgot to add, it doesn't misfire constantly while it's cold. It'll run good for a few cycles, then miss for a few, run good, and just repeats until it's good and warmed up.
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10-09-2013, 02:16 PM
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Electronics Tech
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Join Date: Mar 2013
Posts: 1,194
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Checking the fault codes would REALLY be helpful here. Otherwise all we can do is throw guesses at you.
2005 2.3L XL Electronics Tech since '70's
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10-09-2013, 06:35 PM
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Re: Cold Temp Misfire
No codes as of now.
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10-10-2013, 12:14 PM
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Ford Motor Company
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Join Date: Jun 2013
Posts: 142
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Re: Cold Temp Misfire
air temp sensor in the bottom of your air box might be my best guess.
Or mass airflow sensor.
have you tried cleaning either then reseting the PCM?
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10-10-2013, 07:31 PM
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Wannabe Stormtrooper
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Join Date: Feb 2013
Posts: 2,134
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Mine does the same thing, changed the sensor and it still does it
Sent from my Android using FRF App
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1993 XLT 2.3 Single cab 2wd
Used to be lifted, but now low and slow. Flipped hangers and cut coils up front for 2/2 drop. Soon to be 3/4, 17x8, 235/45/17 up front, 245/45/17 in the rear 300K+ miles
My Build Thread:[url]http://www.fordrangerforum.com/project-logs/89577-jldanger-rangers-build-thread.html[/url
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10-11-2013, 02:13 PM
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Re: Cold Temp Misfire
There isn't a sensor in bottom of air box, but I just cleaned the. MAF sensor and reset PCM, will let you know results soon.
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10-12-2013, 12:45 AM
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Ford Motor Company
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Join Date: Jun 2013
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Re: Cold Temp Misfire
I think there really should be one at in the air filter box. It's either a air temp sensor or air pressure sensor.
So you're saying that thre is NO OTHER time that it misses?
Can you define "misses" so that we are talking the same language?
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10-12-2013, 05:09 AM
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Ford Ranger Driver
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Re: Cold Temp Misfire
Does it do it in open loop and then stop in closed loop?
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Quote:
Originally Posted by bigj0430
No codes as of now.
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How many times have you checked for codes? Have you ever had a pending code?
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)
2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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10-12-2013, 01:46 PM
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Re: Cold Temp Misfire
Quote:
Originally Posted by matteusclement
So you're saying that thre is NO OTHER time that it misses?
Can you define "misses" so that we are talking the same language?
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It will idle rough then smooth out and then rough again. Also at take off will sometimes studder real bad and then pick up. And yes, only misses at cold temp.
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10-12-2013, 11:45 PM
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Ford Motor Company
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Re: Cold Temp Misfire
I just went through something very similiar to this after doing my wires...
in the end it turned out my haynes manual was wrong and I had wired it wrong resultig in misfires and poor performance.
check you firing order again.
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10-13-2013, 07:49 PM
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Re: Cold Temp Misfire
Last code was a misfire. Replaced coil pack, reset codes, and problem solved. So I thought. Now that the weather has turned a little colder, it has started missing while the truck is warming up. Once warm, it's fine. So I know it isn't the firing order because that would cause a constant issue. It has been a few weeks since I've checked codes though.
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10-13-2013, 11:32 PM
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Ford Motor Company
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Join Date: Jun 2013
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Re: Cold Temp Misfire
It sounds to me like your air temp sensor then.
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10-14-2013, 06:54 AM
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Mr H....A....P...P....Y👿
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Join Date: Nov 2012
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Re: Cold Temp Misfire
02 2 3's dont have an intake air temp sensor.
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10-14-2013, 07:09 AM
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Ford Ranger Driver
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Join Date: Jan 2009
Posts: 6,268
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Re: Cold Temp Misfire
Quote:
Originally Posted by stateranger
02 2 3's dont have an intake air temp sensor..
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It might be part of the MAF? does the maf have 6 wires?
__________________
2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)
2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
Last edited by modelageek; 10-14-2013 at 07:29 AM.
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10-14-2013, 09:22 AM
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Ford Motor Company
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Join Date: Jun 2013
Posts: 142
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Re: Cold Temp Misfire
i think that's right, it's all built into the maf.
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