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Ford Truck Club Forum > FORD F-100 | F-150 SERIES > 2004-2008 Ford F150



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  #1  
Old March 8th, 2013, 02:24 PM
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Default 5.4L 3V with miss, rough idle and codes P0340, P0344, P0345, and P0349

I recently purchased a Ford pickup. I bought a 2004 F-150 with the 5.4L 3V engine. I have only driven it for about 300 miles so far and am having problems. The engine has 200,000 miles on it. I have read several posts on here about the cam phasers which I believe that I may have some issues with. The engine will run good when cold, on the road, etc. The engine does have a slight ticking after it warms up (cam phasers?). When I come to a stop after the engine is operating temperature, the engine will start to miss and shudder and all 4 above codes come active and are also pending (8 codes in total). All 4 codes are logged at the same time. I have replaced both cam position sensors, both sensor ends and terminals for cam position sensors, checked wiring around rear of engine (does not appear to be rubbed through), all plugs were replaced, and all COP boots are good. Is there anything that can cause these codes that may not be the actual cam position sensors, ie. VTC, COPs, cam phasers? Anyone know what pins the cam position sensors come to on the ECU (so I can ohm the entire wire harness)?

Also, if the engine is missing with the codes active and I rev the engine up it will come back to idle and run great. The engine never dies out, just runs horribly. I have also unplugged each sensor with the engine running which has no effect on the way it runs.

Has Also thrown these codes

PO345
PO174
PO171
PO012
PO340
  #2  
Old July 18th, 2014, 08:58 PM
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Thumbs up Found my solution

I was having lots of problems with driver side codes PO0345, PO0349' PO022 and a couple of others. tried switching sensors and solenoids driver side with passenger side with no change. my 5.4 would run good while driving but when trying to park and make low rpm maneuvers it would run rough and sometimes stall. I found a blog that talked about changing the oil to 15W40 the oil used in diesels, and it worked, no more problems. that was a month ago. The actual cause of all the problems is the oil pressure drops to low at idle and will not advance the cam shaft for low rpm speed, causing a miss diagnosed problem of the cam timing being out by one tooth. The test for this problem is a short rev of the engine about 1500 rpms rill push the cam back in time until you try to maneuver again and it gets retarded. hope this helps all others with this problem in the future, I will be reducing to a slightly thinner oil before winter and keep reducing at each oil change until I find a happy medium. also tried Seafoam to clean oil ports with minor results.
  #3  
Old July 18th, 2014, 09:41 PM
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I wonder what Klitch would think about that


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  #4  
Old August 16th, 2014, 09:22 PM
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Camshaft Position Sensor is your first code, 2nd is dirty mass airflow (MAF) sensor,so is 3rd code, 4th code is VCT solenoid, check the threads, years ago I did one of these, very simple, you have 2, bank1 and bank2, yours is bank 1, passenger side, your last code also deals with what I just typed. If I were you, Id start with the VCT solenoid, code says to replace passenger side, but I'd do both. Its easy. Look on ebay, they are OEM and half the cost.





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Old August 16th, 2014, 09:24 PM
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Oh, and to the guy using heaver oil.....good luck, you will be clogging the screens on the VCT solenoid....can you say BOOM!!!!





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Old August 17th, 2014, 06:42 AM
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Quote:
Originally Posted by pete59edsel View Post
Oh, and to the guy using heaver oil.....good luck, you will be clogging the screens on the VCT solenoid....can you say BOOM!!!!
is the cam phaser the same as the VCT ?


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  #7  
Old August 17th, 2014, 11:25 AM
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No J, the cam phaser is what gives some of the 04's the infamous "tick" sound. The VCT solenoid has those small screens, that's why Ford recommends the light oil.





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Old August 18th, 2014, 06:38 AM
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I seen the photo in your old thread that you made to replace the VCT

what is the relation between the oil and the screen
does the oil cause it to turn or something ?

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  #9  
Old August 18th, 2014, 07:09 PM
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I'm not sure how they work. Just know those are some small screens for sludge to get trapped.







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54l , codes , idle , miss , p0340 , p0344 , p0345 , p0349 , rough

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