Ford F-150 (2004-2008) :: 5.4L - Getting Codes P0340 And P0344 Randomly?
Sep 2, 2016
At around 100K miles started to get the dreaded P0340 and P0344 that occurs randomly - engine cold, engine hot, rainy, hot, cold, you get the picture. Only occurs at startup. Shutdown/Clear Code/Restart and all is well for days... otherwise the engine runs fine. Have replaced the CMP sensors, thoroughly cleaned CMP and crankshaft sensor connectors, even replaced the alternator. I would like to tone out the wiring back to the PCM connector pins. I am trying to find a pinout diagram. PCM is 7L3A-12A650-GKF.
View 2 Replies
Advertisement
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? 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.
View 14 Replies
I recently purchased my first Ford pickup. I bought a 2006 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 146,000 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 well 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 the 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? What pins the cam position sensors come 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.
View 14 Replies
I have the error code P0340 and have changed both camshaft positioner sensors, cleaned the air sensor and throttle body and still the engine stalls. I can accelerate at 40, 50, 60mph and it jerks violently. I tried the "locking it in third" trick but it still jerks. Today I unplugged the left cam sensor and the truck idles @ 400rpms, does not stall, and pretty much drives great! Hook it back up and crank it, within 10-15 seconds it stalls. I plan to check the wiring....
View 14 Replies
I have a 2006 f150 it was making a knocking noise after the engine oil temp reached 160* and made the noise to 1700rpms. I thought it was the cam phasers so I replaced them. The truck is still making the noise and running rough and stalling but not as bad and not as often. Before it did it all of the time. The truck is timed properly. I had a new cam sensor and tried it but that did not work. I watched vct on the scan tool and both cams are in sycn.
View 2 Replies
Left my 2002 SF 2.4 with someone to replace clutch. Calls me after the job to say it doesn't run!
Codes P0100 and P0340.
Maf is new. I had a Cam sensor in stock. Nil fix.
Have changed out recently;
Fuel Pump
Coil packs
CPS
MAF
and just now, the Cam sensor.
It starts right up then shuts off, does not slowly sputter and die.
I asked him to go over the wires and connectors. He could have stressed a cable while pulling the tranny. I do have the old MAF that I could try, but doubtful it would fail at the same time as a clutch job. Now wishing I had done the clutch myself!
View 1 Replies
04 trailblazer, 4.2. Running rough and SES light on. Had codes pulled and showed p0340 (CMP sensor circuit malfunction) and p0300 (Multiple engine misfire detected). Replaced the CMP sensor and left negative battery cable unhooked for 20 minutes or so to clear the codes. Upon start up no more SES light and idle was slightly better. Within seconds it SES was back and it is again running poorly. Cruise control is no longer functional as well.
View 7 Replies
I'm having issues with my a/c blowing randomly warm air. At idle (stop lights, heavy traffic) the cold air will kick off but the fan will remain constant. Once I'm back up to full speed, the cold air will come back. It also works if I turn the a/c and fan off for a few minutes and turn it back when I'm at highway speed. I've recharged it and when it blows cold it will freeze me out. I'm thinking its a possible compressor issue?
View 6 Replies
Truck shifts great from 2 to 4h to 4l and back to 2. However, at random times - any speed - usually when slowing down - I hear/feel something engage and there is usually a ratchet sound. I figured out its the 4x4 - if I switch to 4h then back to 2 quick, it stops. What the heck.
View 1 Replies
OK, 05 v8 4.6l
I am having very random overheating for last few weeks. Started randomly one day in stop n go traffic. Thought maybe struck tstat so replaced it. Same thing...replaced water pump, fan clutch, serpentine belt, coolant reservoir cap since then. During all those replacement I flushed system with garden hose. Burped system to best of my knowledge. Still overheats randomly. Seems to happen every day now at hot times (100*). I drive around all day for work so been watching it closely. Temp gun runs 190* on tstat housing at operating temp. When it was rising up in temp I pulled over and temp gun read 200 ish.... it is in fact getting hot. Any freaking clues? Oh and have pressure tested good....combustion test good...
View 14 Replies
My sons 05 F150 is randomly dying during low idle. We removed and cleaned the TB and cleaned the MF sensor. For example, if he is coming up to a stop or slowing down, the truck will die, but starts right back up. So far no CEL and truck seems to idle and run fine, just ever so often will die.
Anything to check on the 5.4s
View 3 Replies
About a month ago, I was driving 50 mph in my 06 screw on a dirt road. There was an old wood bridge that was not as flush as I was expecting. Jolted the truck pretty good but it kept on trucking. However, a few seconds after the jolt, the power to the AC cut out. All I had to do was turn the AC to "off" then back on and it'd start working fine. Over the last month, the power randomly cuts out, but will go back on after I switch to "off" then back on. It's happened maybe 3 or 4 times since The Big Jolt.
View 6 Replies
Having a misfire problem I can't track down. First issue was random cylinder 8 misfire code. Checked everything, nothing obvious. Cleared code, problem stopped and engine ran fine. Then came back, cylinder 8 misfire. Swapped coil with #5 but problem did not return. Since I assumed it would come back, I went ahead and bought Accell supercoils and new Motorcraft plugs and replaced them all (120k miles, no broken plugs ). Truck ran great on the test drive! Then it sits overnight and bam, cylinder 5 misfire as soon as I start it next morning. Then after messing with it I get cylinder 5 bad coil (code 355 I think). Put one of the Ford factory coils back back on #5, no change and still misfiring. New plug, new coil on all cylinders... Why did it move from #8 to #5? If it was an in injector, seems it would still be #8 since I did not mess with those.
View 10 Replies
I bought an 07 F150 5.4 4x4 with 135k on it about 6 months ago. Shortly after buying the truck I began experiencing a shudder when lightly accelerating up a hill. Also when accelerating hard it would misfire. Thinking that it was plugs or COPs I changed the plugs and coils. That fixed the missfire issue but it still shuddered when accelerating up a hill.
I decided to take it back to the used car dealer where I bought it so they could fix it. On the way there the fly wheel broke. The dealer replaced it and thought that it was the cause of the problem but on the way home I still experienced the shudder. I took it back and they "scoped" it and found that the torque converter was bad. They replaced the TC and now there is no more shudder BUT now I have a new problem.
Now if I am driving at highway speed and let off the gas it feels like it immediately down shifts for a few seconds then shifts back up and coasts along until I give it gas again. There is enough resistance that it feels like a jake brake or that the breaks are being applied. Also if driving along at 30 - 40 mph and just holding the gas in the same spot maintaining 30-40 it feels like it down shifts and up shifts over and over until I either give it more gas or let off all together. Also a few times pulling away from a stop I will get a thump.
I have an appointment with a transmission shop in a few days but today on the way home I put it in second gear while going up a hill so it would not shift and it seemed like it was coughing and sputtering. So now I am wondering if that is what is happening and either feeling like or causing the down shift up shift issue.
If it is a missfire issue why would the new torque converter cause this? It has all new motor craft plugs and all new after market coils.
There are no check engine or other warning lights lit on the dash. I have a cheap ODB scanner and it shows two codes. B1676 which apparently is a Battery Pack Voltage Out Of Range or ABS voltage issue. The voltage is showing at 14.2 volts and there is no noticeable battery issues. The second code is a P1000 Drive cycle test not complete. (this code has been showing for some time the 1676 code is new since the torque converter swap)
One side note: after the TC change every time I start the truck the radio/cd changer cycles though all the CDs. like it it is checking for a disk so it clicks and pops around from a moment. The only time I heard this happen before was after having the battery disconnected. The clock is not reset though like I would expect if it was losing all power.
View 2 Replies
I have a 2007 f150 with the 5.4 in it and today I was driving it and my tempreture gauge randomly shot to cold and check engine light came on. Also can't even find the dam radiator cap due to too much plastic!!!
View 2 Replies
The past couple of months my ABS light has been coming on randomly. It comes on after several minutes (or hours sometimes) of driving then stays on. I wrote it off as a bad sensor but now, even when under light braking, if I hit even a small bump in the road, I can feel the ABS activating in the pedal. Seems like more than a sensor to me. I know I have a front wheel bearing going out but how would that be related? 2007 F150 5.4 2wd
View 1 Replies
So randomly today, my Edge is constantly rebooting and the ABS and Parking warning lights are on. My brakes feel fine though and the Edge won't stay on for longer than a few seconds before rebooting.
View 1 Replies
Here is the case. I drive a 150 mile trip once a week, mostly 60-65 mph highway. Well in the last 3 months it started randomly bogging down slightly with the cruise on. I can be going along and its like a strong gust of wind hits the truck from the front. It will make the engine bog then it like releases or frees up and the truck carries on.
I also noted on my edge evo (not programmed just plugged in for the gauges) that it shows the engine load shoot from about 30% cruising to about 80% when it have its issue then on the sort of POP release the load goes back down to the normal range. The entire bog down only lasts about 3-5 seconds and I can power out of it by pressing the gas. It may happen 15 times on the trip may only happen once or twice...very random...
Things I have tried
Replaced plugs and COPS
Replaced FPDM
Cleaned MAF and TB
Replaced Air Filter
Changed Oil
Fuel Filter changed in November
View 3 Replies
I recently had my alternator and battery replaced due to my truck dying out randomly on me, tested the alternator and failed, replaced battery, and still got the same results, battery gauge seems to drop quickly, what could be going on, I have been told to replace the fusible link that goes from the battery to the alternator....
View 1 Replies
I've developed a miss no codes mild at idle horrible at 70 mph 2100 rpms driven me nuts cant figure it out cops are good just put in new plugs & gonna swap them out for a new set they were motorcraft. Sprayed water on lines & intake looking for vacuum leaks but no change....
View 7 Replies
So, my 2004 FX ran perfect as always when I parked it last night but this morning it just will not start. It turns over like a SOB but won't catch (Installed a new Optima Red Top about a month ago). Tried my OBDII but it's showing as "fail" or "no codes".....I tried testing it several times. I've never had ANY problems with it starting.
View 2 Replies
