PO344 code - Ford Powerstroke Diesel Forum
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Old 12-23-2011, 01:47 PM
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PO344 code

hey everyone, im driving my 95 psd and all of a sudden the truck is running a little funny and i hear a loud popping.. i pull over and pop the hood and it almost sounds as if the exhaust is leaking into the intake. it was a loud pop for every rotation. the truck was still running so i decided to try and make it home...a few mins later the popping stopped but the truck was still running funny. a rougher then normal idle and didn't have the response that it should. i pulled the code and it was a po344 cam position sensor cmp circuit intermittent error. at first i thought i broke something or bent a valve or sprung a huge exhaust leak cause thats what it sounded like...but it went away so i know thats not the case.. has anyone ever had this happen...? im gonna get a new cps to see if that takes care of it....but i still dont understand the popping.

the mods i have...
bts stage 1 injectors
bts 5 pos chip
dieslsite fuel system
banks intercooler
bts tranny

any help would be greatly appreciated
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Old 12-23-2011, 01:52 PM
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I just had a truck that had a p0344 code in it yesterday. If I ran a KOEO test it kept logging me a code p1219 for cylinder ID fault. I checked the CPS and it had just been replaced. Checked CPS wiring, nothing found. Replaced IDM and code went inactive. I did not have the same symptoms as you. The customer just said the truck would have intermittent low power, rough idle and check engine light.

You can start with returning it to stock and seeing if it acts up. Then trying a new CPS wouldn't hurt. Also look over the wiring and make sure nothing is rubbed thru. If you do all that and still have issues I'd try and run a KOEO test and see what pops up.
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Old 12-23-2011, 02:00 PM
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sometimes the wiring or ground can cause intermittent cps issues, as well as the cps itself.
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Old 12-24-2011, 11:18 AM
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i replaced the cps today. also checked all the wiring from the batteries. the truck started fine and i ran it around the block and no codes were thrown. but when the truck is idling it seems as if one of the cyilinders is hitting a little harder causing the truck to have a little more shake..now im gonna pop the valve covers off to do a visual inspection.... still dont understanding what coulda been popping
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Old 12-25-2011, 09:49 AM
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popped off the driver side valve cover and the rocker arm for the exhaust front cylinder was lying on its side.... the two bolts that hold the rocker arm in place broke and the pushrod was bent... now i gotta get the bolts out the head and try to find some replacement bolts and pushrods.. anyone know where i could get some online?
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Old 12-25-2011, 09:54 AM
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the pushrod to the intake valve was bent... and with the exhaust rocker arm being brokes neither of the valves were opening when i was running the truck...i know this isn't good for it but what are some of the other damages that could have happened..?
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Old 12-26-2011, 03:24 PM
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Replace both rocker arms, push rods, and check the glow plug for that cylinder.

Go to the international dealership to get the parts. Ford dealership will rape you on the price.
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Old 12-28-2011, 03:57 PM
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im all back together and running great again.. i ended upi getting the parts from ford though. the company i work for gets a discount so it ended up being 3.65- pushrod 6.00-rocker bolt and 23.25 for the rocker arm...not too bad. thanks for the help guys
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