P0088 rattle

[DogramTD]

Is there a chance it could be the CP3? I read this morning that a bad CP3 could make this noise, also it is still throwing the P0251 (CP3 Pump regulator control). I found on another post someone said this (not to me):



"some of the symptoms would be no power, smoke and maybe some injector knock (sounds like old generation of 24 valves) we are having a lot of problems with injector return on the 600 engine"

 

[cerberusiam]

P0251 is usually an FCA problem. If you replaced that its something else the ECU thinks the FCA could cause.



Yes, internally the CP-3 can have issues that will max the rail pressure, blow plugs out the side of the pump, etc. If there has been ANY contamination in the system its possible to mees the CP-3 up to where it iwll just keep building pressure.



If you have replaced the rail pressure sensor and FCA its has to be either the injectors plugged and not flowing (rare), or the CP-3 (rare but not as rare as plugged injectors).

 

[DogramTD]

Injectors and/or CP3 is expensive. Did this problem surface soon after injector nozzle swap? I'd remove the smarty program and boost fooler, recheck check all the connectors, clear the codes. Repost all the symptoms and how this all started. (I read the thread but am aware there are other related threads)

I have done the above a couple times. Returned tune to stock/cleared codes, disconnected AD and ran off of Stock LP, Checked filter in canister, replaced FCA/LV/RP sensor, disconnected FCA while it was running, re-installed stock nozzles (sounded worse then) and yes all this started 1 day after I installed the nozzles (new version on old version bodies). I just removed the injectors and they are being shipped out to the company for testing. I cant even explain how loud the knock/rattle sound is (not a rod)

 

[DogramTD]

Wanted to close this thread out with the findings. After swapping the nozzles back to my stock nozzles, the problem remained. I spoke with several shops, and recieving multiple opinions, I settled in on the leaking injector theory. Removed the injectors again and sent them out with the 50 nozzles for testing. Fairly positive I would not be reinstalling them, I bought brand new II with 60hp nozzles. Around the same time I received a call from from the testing shop (will keep name anonymous to refrain from flaming, unless they decide not to refund me for my nozzles) saying there was "nothing wrong with them and they would put them in their own truck", I wasnt buying it especially after being told that NO ONE in the US can effectively test the flow of injectors outside of the motor. The report tries to blame contaminated fuel and "possible" incorrect installation. (kind of insulting)



Installed the new II sticks and she purrs like a kitten! My once, perfectly good old version injector bodies of which i installed the new version nozzles on, are now being returned for cores. Be aware when installing your nozzles, advice is to not mix versions although they say you can mix new old bodies with new nozzles, you take your chances. It may run great for a while but who knows when that time will come. . Mine did after 300 miles.

 

[TCDiesel]

We had some heated Phone conversations ... But you made the correct and less costly decision. . Just to Be clear Collin Purchase NEW Genuine Bosch 505s with NEW Bosch Tips that II modded to 60hp. . NOT China/Italy aftermarket or R/R junk that is available on the market.

 

[DogramTD]

LoL! Yes we did Todd, but thanks again for your help. Cores will be in the mail on monday.