fault code 2552,injector meter rail high pressure,HELP

I switched all four of my solenoids , also , and have that ticking noise intermittently , also. But , it smoothed out the idle quite a bit , and that's what I wanted. Like to know what that ticking noise is , also.
I don't think your problem is air , least I hope not. I would think the system would purge any air out , by itself. Have you tried switching #1 and #4 back again , to see if it corrects ?
I read of one fellow on a thread , who said the only way his problem was corrected , was replacing all 4 actuators at the same time. Replacing 2 at a time didn't help him , but he bit the bullet , and replaced all 4 at once.

 

They are different . Mine doesn't have metal gaskets , just an O-ring. You got the order right. You can switch 1 & 4 , and 2 & 3 .

 

Dang ! That's a good question. Surging , yea , that's sure possible , with air in the fuel line. Smoking , I wouldn't think so. Smoke means too much fuel , or not enough air. Improper air/fuel mixture , you know ?
That's why I think these systems would be self-purging . Not sure , by any means . But , unless something else is wrong , and a supply of air is constantly entering the fuel system , I would Think, given Cummins high pressures , it would force any air out.
There's a post here , somewhere , in another thread , that tells you how to check for air getting into the fuel line , on a constant basis. BUT , that fellows problem was run-on, after shutting the key off. So, I don't Think that's what we're talking about here.
Like I said , I switched my timing and fuel actuators , with no problems , except for this : mine ( 05 engine in an 06 KW , stock from the factory that way , common ) is : mine don't have metal gaskets , they have O-rings , and , 2 . One of the O-rings stuck onto the fuel pump , I didn't notice it , and I had 2 O-rings on one , and None on the other . The one with 2 leaked all over , at idle , and I took them both back off , made Sure I got it right the second time , and it started and ran well. No problems.
Hope this helps !

 

I wanna add one thing. I got a fault code , using the Insite program , that showed 0 oil pressure , once. I replaced the sensor , no more fault code.
Also, Cummins electrical connectors to the engine , for sensors , seem to be pretty well waterproof. The truck builders ( KW ) , who put sensors on the engine , well , they seem to not be waterproof. They'll put a rubber boot over them , but a mechanic , or owner , who slits that rubber boot, or takes it off , invites a problem.
On my truck , getting water in a top facing electrical connector , when I had my truck washed , an they opened the hood , well , it only takes a drop or two in the right place , to short it out , and 5 volts shorting out , can burn the pin right off a sensor. Some of those sensors are Dog-Gone expensive!

 

Me to! Is there a sensor on the fuel pump ? Maybe its gone bad , or has a bad connection. That might account for the engine running at high RPMs. The ECM would think its starved for fuel. But, it should see the RPMs , and.... , heck , now I'm really lost....