Injection system cleaning.

[x MadMAX DIESEL]

If you had rusty debris in your injectors. What kind of cleaning would you do to insure its clean as a whistle again? I don't know what would cause rust besides water? I plan to blow out all the injector lines with eyther or brake cleaner. I am going to use the gm upper engine cleaner and run it with a mix of fuel till it runs out. Should I do anything else?? I haven't dropped the tank yet, but my filter doesn't appear to have visible water setting in it. Should I remove my second cp3 and have that tested?

 

[PureHybrid]

Have any pictures? Things like that will wipe out parts in a hurry. Find the source, and flush the hell out of everything. Might use something that won't evaporate in the line when you hit it with shop air, you want it to help carry dirt out of the lines. Maybe can flush lines with straight injector cleaner?

 

[x MadMAX DIESEL]

I don't have any pics. I can see anything inside the lines but according to exergy 7 of the 8 had so much debris in them. Funny though my water in fuel sensor wires were pulled out from the sensor. I am always careful to unplug that harness and be easy on the wires being so thin. Maybe someone sabotaged the tank with water?!

 

[Yellow Jacket]

Where do u get your fuel from?

 

[x MadMAX DIESEL]

Mostly fill it up at large truck shops on the interstate while heading to pulls. But there's been a few times I've filled up at the gas station by my house, which doesn't get high volume diesel sales. I pray that's what it is, it will be easy to fix if the tanks filled with water. I'm afraid it's gonna wind up being another ghost chase where I never determine the root cause.

 

[x MadMAX DIESEL]

Tractor supply has something called evap-o-rust. Anyone ever used it? I might just buy that and throw all my fuel lines in it for awhile. Then clean them with brake cleaner and blow em out. Reinstall injectors and lines and run gm upper engine cleaner with a half gallon of fuel till it dies. Sound like a good plan?

 

[Dozerdog74]

That sucks man, hope you get it figured out.

 

[WI Huck]

There is not enough clearance inside of an injector to flush any debris out of it. The tolerance between the needle and the nozzle body is so close that if you hold one part in your hand and warm it up it will not fit back into the body. The fuel filter should catch any garbage from the tank. If you have stuff in your injectors most likely it happened after the filter. Your CP3 could be coming apart inside. Were the injectors changed recently which would have opened up the fuel system to contamination? It is normal for the LB7 lines to rust at the sealing area of the injector and when those lines are reused without cleaning a lot of bad stuff can get into the injector.

 

[x MadMAX DIESEL]

I just put a dual cp3 kit on it recently. 10,000 miles ago I had my injectors flow matched by exergy and all was well. They had bad balance rates but that was from tuning. That was fixed and they balanced out perfect. Only thing that changed past the filter in the last few months was a dual cp3 added, and I fixed a leaking injector seal a few weeks back. So the line was open for that little job.

 

[x MadMAX DIESEL]

Btw I have new injectors coming in the mail. Is there a way to check that dual cp3, will exergy be able to open it up and find if there's an issue

 

[WI Huck]

Was your second CP3 new or used? Exergy does work with CP3 pumps.

 

[x MadMAX DIESEL]

It's a used lb7 pump. The guy I bought it from said it was a good one.

 

[xtremebikr04]

It's a used lb7 pump. The guy I bought it from said it was a good one.

I think I would for peace of mind have the pumps tested and looked over. would suck to ruin your new injectors..