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  #1  
Old 12-16-2009, 02:36 PM
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Join Date: May 2005
Location: Lethbridge, Alberta
Vehicle: 2006 Ford F150
Posts: 518
Getting code p0308

I have a 2000 F150, with the 4.6l. It has roughly 260000km. I finally logged the p0308 code. Problem is, it only "misfires" when it is cold out, and very intermittently. I had the problem last year off and on for about a month. Problem dissapeared, and hasn't happened for around a year. I never got a code last year, and am glad one showed up now.

I've already had a look at the coil, and spark plug. No moisture, corrosion(I changed the plugs out a couple months ago). Everything looks good. Swapped both the plug and coil to another cylinder, code did not follow. I have since replaced the fuel filter, and ordered a set of injectors. I'm assuming it has to be an injector, or fuel related since the problem didn't follow the coil and plug.

Is there anything else I should check while I wait for the injectors to show up? Keep in mind it only does it when its cold out (it has been -10 to -30celcius). And the problem is still intermittant.

I have searched a few other threads, most stating that it wasn't the coil/plug with no real outcome of what their fix was.
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  #2  
Old 12-16-2009, 04:41 PM
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Join Date: Jun 2007
Location: Utah
Vehicle: 1999 Ford F-150 5.4
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I need to learn to read.. You can get remanufactured injectors on e-bay for about $100 what kind of plugs do you have? migh want to do a compression test. you could swap injectors.
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Last edited by jethat; 12-16-2009 at 04:45 PM.
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  #3  
Old 12-16-2009, 05:09 PM
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Join Date: May 2005
Location: Lethbridge, Alberta
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What I meant was I bought a set of remanufactured injectors off ebay. A set of 8 bosch injectors. Even with express shipping it will be another 3-5 days before I get them. And I had installed the motorcraft plugs.
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  #4  
Old 12-16-2009, 05:19 PM
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you could swap an injector to see if thatts it.
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1999 F-150 xlt 5.4 4x4
1971 Mach 351c 5 speed TKO600 Tremac-sold!
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  #5  
Old 12-17-2009, 12:25 AM
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Join Date: May 2005
Location: Lethbridge, Alberta
Vehicle: 2006 Ford F150
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Yeah, I will try doing that tomorrow. I just figured it would be a good idea to replace the injectors anyways. When it is missing, its not a constant miss either. Its almost a surging type of misfire. I'll probably replace the o2 sensors while I'm at it tomorrow as well. Just for the sake of changing them.
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  #6  
Old 12-18-2009, 01:36 AM
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Join Date: Dec 2009
Location: plainfield, il
Vehicle: 2000 ford F150
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i had the same problem put new plug/coils on all and still happen. had a compression check done and was 70lbs, should be at 150 on my 5.4l the light is always on now but haven't got around to finding out where it leak is yet. good luck
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Old 12-18-2009, 01:36 AM


 
 
 
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