P0088 rattle

[DogramTD]

After all the posts I have put up and no help, I continued on with my testing. I found on Geno's garage an easy test for the FCA, remove it and hook up 12V from the battery; if it engages, its good. I performed this test after a P0251 code and it was good. I drained the filters of any water; there was none. So finally I decided to start the truck back up and immediately it sounded like crap with a nasty rattle, popped another code; P0088 High rail pressure and the P0251 remains.



What could this be; pressure sensor, relief valve... . ? I recently installed new DDP nozzles, could this be it even after an initial 300 miles of trouble free operation? What should the nozzle part # be? The ones that were sent to me had 5500 on them.



I would appreciate some type of input... Todd at TCDiesel, you have anything on this?

 

[sag2]

The correct test for the FCA circuit is to disconnect the FCA connector. Put a test light between the two terminals of the FCA connector being careful not to ruin the terminal(s) by jabbing the test light and ground wire into the connectors. Turn the key on, and within approx 20 seconds the test light will light brightly and go out one time. It should be as bright as if you connected the test light to battery + and -.

If it lights good the ECM, wiring, and connectors are good. Try a known good FCA. If the two tests above are good, the pump is bad.

 

[DogramTD]

I performed the circuit test and the circuit was good; received the bright flash after 20 seconds. Why would the CP3 be bad?



I let my buddy use my smarty on his converted Common rail F-250. Once I put it back on my truck, this problem happened. Each truck was returned to stock before switching over. Could there have been a bad file that messed with my ECM?



Should I have my CP3 sent off for testing before I replace it? Is there a way I can test it?

 

[DogramTD]

BTW, were you speaking of the AD or CP3 pump? The test said that if the cicuit tested good, it was the fuel pump. I dont think the AD is bad though, it is running.

 

[TCDiesel]

Their are 4 Items all CR should have spares Filter,Pressure sensor, FCA ,LV. If you upgrade the LV to CPRV its not necessary to carry a spare,You may incur dead pedal with the CPRV, but it will NEVER leave you stranded. 03/04 extra LP.

Those Parts can be change easily and with common tools,an are 8 out of 10 times the problem. Rail pressure gage is extremely helpful...

 

[DogramTD]

My truck starts just runs like crap and makes a lot of racket. The filter is a baldwin which i replaced 5K miles ago. If the solenoid on the FCA actuates with 12V of power, it should work correct? especially if the circuit tested good.



Finally... LV, CPRV? I know PRV means pressure relief valve but i'm not sure what the other is.

 

[TCDiesel]

CPRV (Constant pressure relief Valve) its an upgraded Valve, I believe We are the only company in the world that modifieds the LV . . We have sold over 5k of them. they are modded to customers setup.

 

[DogramTD]

I'll call you

 

[DogramTD]

Replaced FCA, ran OK for 1 mile then went back to the same ole issues. Installed T&C Diesel's CPRV and still rattling and throwing codes. I isolated the AD and ran off of the stock LP, no change. Refreshed Smarty software from the computer and reinstalled on the truck, still no change. Could it be the injectors I installed? It would be odd because it ran great for 300 miles before this happened.



Any help here would be great. I'd hate to take it to the stealership but it looking that way.

 

[TCDiesel]

Call In the morning... Yep. . When it comes to CR problems will redevelop. Its hit and miss when installing Nozzles on anything other then vigrins... remember when it come to CR everyone wants to sell you something. At times it seems the downside is NEVER Mentioned. T&C will NOT sell new version nozzles to old style Injectors. ONLY at customers request.

 

[DogramTD]

did you try the rail pressure sensor?

Not yet, I was going to call my buddy this morning and have him come over to try his known good one.

Call In the morning... Yep. . When it comes to CR problems will redevelop. Its hit and miss when installing Nozzles on anything other then vigrins... remember when it come to CR everyone wants to sell you something. At times it seems the downside is NEVER Mentioned. T&C will NOT sell new version nozzles to old style Injectors. ONLY at customers request.

I'll call you as soon as my coffee is done brewing, Thanks Todd

 

[DogramTD]

I was just told by a local diesel shop that it sounded like a leaking injector. How do I determine which one it is?

 

[JJPage]

I'll bet you have a bad harness/connection to your FCA. What your describing in the last couple of posts, makes it sound as if the FCA were unplugged, especially since it ran correctly for a mile, and then acted up again. Broken wire... ?

 

[DogramTD]

When I performed the circuirt test, it passed

 

[cerberusiam]

I was just told by a local diesel shop that it sounded like a leaking injector. How do I determine which one it is?

Cylinder contribution test may show you which injector is possibly the culprit if it is overfueling and\or leaking.



If you haven't done it, an injector return flow test may indicate you have one that is worn and bypassing too much fuel.



The code really sounds like a bad sensor but it is hard to tell at times.

 

[DogramTD]

I agree the code does make it sound like a sensor but it sounds like it is an old azz cat motor that just started up in -38 degree weather, rattles like crazy. I put the stock nozzles back on and it sounds worse.

 

[JJPage]

did you try the rail pressure sensor?

While it's idling disconnect the rail pressure sensor, to see if there is a difference in running.



While I was working on my truck in Dave Smith's parking lot, trying to diagnose my problem, I disconnected my rail pressure sensor and was going to exchange it with my spare under the back seat. I did not have a socket or any wrench for that matter, that would fit the sensor, over an inch in dia.



At that point I gave up and decided to walk over to their service dept... to make my point, I forgot to re-connect my rail pressure sensor, my truck rattled and loped like crazy driving into their service bay. I realized quickly what I did, but it did throw a P0088. Once the sensor was reconnected, those symptoms were gone and they cleared the code.



The sensor was 107. 00 at Cummins, I had purchased it for other reasons and it was not my problem, but it seems you may be there, if not you will have a spare. I know..... this is getting nuts, all the parts I carry, just in case.

 

[DogramTD]

Whats cummins website? The one I go to doesnt have a parts selection.

 

[JJPage]

Here is a reputable site, this shows the rail pressure sensor at $209. 00, I went out to my truck and checked the receipt in the box, I paid $166. 17 at Cummins Northwest in June 2009. Sorry, I was wrong on the price.

You can buy the whole rail w/sensor w/relief valve for another 100. 00

2003-2007 Common Rail 5. 9L

 

[DogramTD]

Tried a known good rail sensor from my buddy's truck, no change. Looks like I'll be replacing the injectors... Why you ask? Well lets just say a well known company claims new version nozzles will work with old version bodies, not in my case or many others for that matter.