True, I have looked everywhere and asked everywhere, no one has said yes it did protect the rest of the system. I installed one just in case , you would think Exergy would have actual data or examples to share with everyone, when I asked them they said the same thing . No reports yet. Find that hard to believe.

 

Sounds like a bit of a prayer if it isn’t guaranteed or warrantied

 

Has anyone heard if the MPROP has saved the fuel system after a CP4 failure yet? Seems like cheap insurance if it actually works.

 

I installed mine over a year ago and I looked for that same info before I did it and since I installed it. I haven’t found 1 case. It actually doesn’t happen very often, but when it does, no bueno.

 

Still nobody with this part has had a failure?

 

Good that no one has had failures. But would be nice to know how and if they really protect the rest of the system , keep the updates coming.

 

I did a search outside the forum, and found this from July 2019. also a lawyer in Florida that would evaluate your case...
Seems to be more info out there since the last time I did a search on this

Judge Rejects General Motors Motion to Dismiss Fuel Pump Litigation

for now I am hoping the Airdog installation and the constant use of OptiLube since the truck was new will keep me safe🙏

 

This is pretty interesting. Thank for sharing. I want to get one of these system savers until I can do the cp3 pump just hard to pull the trigger without any hard data proving it works.

 

Just installed the Exergy System Saver MPROP in my 2015.5 LML.

Following the simple instructions in the link below, It was simple but took me two hours out of straight up nerves, trying to be very clean, very careful, and chasing tools that I put back and still couldn't find. No coolant draining and only one plug to disconnect.

https://cdn.shopify.com/s/files/1/2459/5689/files/System_Saver_Instructions_with_Time.pdf

I took the additional 2 minute step of removing the bracket for the flux capacitor to allow more latitude of movement for the wires associated with that.

It is a cleaner and quicker job than most things we do to these trucks. But the fear factor is high with the threat of knocking debris into the pump innards- which would theoretically be caught by the improved screen. Still scary. I used compressed air to dust out the area and made a really long q-tip with some metal rod to wipe out the area where the new MPROP sits. Maybe non coffee drinkers or those with experience replacing a CP4 would be less freaked out doing this.

Have a magnet handy to hold next to the screws as you loosen them fully. Tape the extensions, bits, etc. together to keep from dropping stuff. When you go to install the screws, tape them to the torx bit. It takes a little extra time but is totally worth it to not drop anything.

So far so good. The Edge Insight CTS2 says desired rail pressure and actual are the same.

$240 worth of peace of mind.

 

Nothing wrong with spending the $$$.

Nothing will save this pump or injectors if it gets contaminated fuel...Those that have Installed Auxiliary filtration with correct Plumbing have 0 problems, and I have had at least five CP4s make to the 500K mile mark, they all are tried ,and Need of replacing. The CP4 lives' or die's on the cleanliness of the fuel its uses.

 

Shortnugly - thanks man for posting the pics and hints - save me a ton of time. Just finished mine 2 hrs start to finish including cleanup. The hints about the T25 and plugs saved me a lot of grief. There are some particles on the old screen - got me worried; can't tell if its just some dirt or shavings. I'll take a magnet to them... if it's metal I'm getting rid of it now while it's still in good shape. (2015 Duramax, 80,000 miles).

 

This only saves the injectors and fuel lines when the pump fails, correct? Seems worth the 1.5hrs to install.

 

The tighter screen is wishful thinking that the larger material will be stopped hoping to effect performance to alert the driver to take action, by that time it has already contaminated the system.

 

Just installed this on my truck and now truck won't start?

 

Sorry, hit send too soon. Truck will crank and crank, but won't turn over after installing this part. Also, I stalled and airdog lift pump prior. Started the truck and let to run to check for leaks...all good.

 

What Part. Did you get it to start?

 

Exergy CP4.2 Inlet Metering Valve (MPROP) from Snyder performance.
I emailed them,they said they don't sell Chevy parts, but right on their website for the description of the part says it's compatible with the 2011-2016 LML Duramax.

 

Th FCA/FPR is touchy, return (FCA/FPR) the part ask for refund, reinstall OEM unit As I mentioned earlier it won't help stop failure.

Now FCA/FPR default position is OPEN, its odd it won't start, if its suck in OPEN it would start and go to MAX Rail Pressure.....Recheck your work make sure you did NOT unplug something or just bad re-connect somewhere.

 

That's our plan. Although the company I got the part from says they won't take it back because it been installed.

 

Mweltz, Yep that's Exergy and its affiliated sellers, I just don't understand why the Duramax owners fall for all their marketing.. You are welcome to call me on this, Unlike Exergy and some of it sellers (Grocery) we are here to help, not just make $$$$$$$. Just look us up on the NET for Phone #.

 

I thought this aftermarket unit had dual screens down to 25 microns and won’t blow out like the factory metering valve thus saving your injectors and fuel lines if pump does fail.

 

Wishful thinking.........it will just be an expense indicator.

 

That FCA/FPR restricts the flow needed for combustion, Lube, cooling the CP4,( CP4s run at Max volume for lube/cooling) and returned COV/LV electronically controlled. Those types of screens are in the manifolds of all L-BZ / MM 6.7 Cummins and a host of other CP3/CPX, I have lost count on the 100s of failed Pumps that have come across work Bench on the harmless materials that plug those filters asphaltenes / organics, bacteria, paraffins just to starve the pump to death.

If you want your CP4 to survive add Auxiliary/Transfer Filtration (Additional Filtration) that really will extend any Pump/Injectors life.

Its always a good Practice to dis-connect Batteries, although its not needed in FCA/FPR replacement, If you want to keep the FPR/FCA call your seller and ask for support, if not re-install your Factory FPR/FCA and return the other for refund... Its Beyond Me Why many D-Max owners drink the kool-aid from BMS Sellers.

 

That FCA/FPR restricts the flow needed for combustion, Lube, cooling the CP4,( CP4s run at Max volume for lube/cooling) and returned COV/LV electronically controlled. Those types of screens are in the manifolds of all L-BZ / MM 6.7 Cummins and a host of other CP3/CPX, I have lost count on the 100s of failed Pumps that have come across work Bench on the harmless materials that plug those filters asphaltenes / organics, bacteria, paraffins just to starve the pump to death.

If you want your CP4 to survive add Auxiliary/Transfer Filtration (Additional Filtration) that really will extend any Pump/Injectors life.

Its always a good Practice to dis-connect Batteries, although its not needed in FCA/FPR replacement, If you want to keep the FPR/FCA call your seller and ask for support, if not re-install your Factory FPR/FCA and return the other for refund... Its Beyond Me Why many D-Max owners drink the kool-aid from BMS Sellers.

Thanks for the reply. I will reinstall the factory fpr today and see if it will start. If it doesn’t what do you suggest?

 

Mijay93, Call Me before you do That...... Ask for Todd 763-228-7121 If you like, I have a few Minutes right now on how to confirm the problem its difficult to type the procedure.

 

Ok my name is Mike. I will call in a little while once I ready and by the truck. Thanks for the help, appreciate it.

 

Okay.

 

Here's a post from my local diesel shop on a cp4 that had the fuel saver installed when the pump failed. My first time posting here but thought I would pass this along to anyone wondering if these things work.

 

The returned Side of ALL CP4s has Nothing to do with the FCA, Plus that Pump (CP4) is equip (GP) Gear pump. That Pump exploded That means Major internal Failure...Just another Shop claiming to be experts, That Shop an expert aright in Cheerleading there supplied vendor...I've Lost count on how many failed CP4 I've tore down and the ones that explode theirs so much carnage its extremely difficult to pinpoint what failed first.... What that ad/Picture tells me someone either added Auxiliary filtration or the shop's memory will fail when the owner Injector(s) fail prematurely.

 

So would you say that these "apparent" fuel savers do not work and are no better then the stock one in there? Thanks for the reply. I'm new to diesels and have a 2011 lml that I would prefer to avoid injector Replacement etc if the cp4 fails before I can do the cp3 upgrade . I've never come across another post where someone had a cp4 with this exergy piece installed when it grenaded. If it's miss information my apologies.

Cheers

 

Auxiliary filtration is the only 100% guarantee that Debris will NOT destroy HPCR components, CP4s fail just the same way as ALL HPPs fail, poor fuel generally relate to dirty or worst contaminate fuel. All of My business, personal and professional (dsl) vehicles have Auxiliary filtration or Transfer filtration with correct Fuel filter, some have both Auxiliary/Transfer Filtration, it not that costly and give you the faith/satisfaction of NO dirty or contaminate fuel. On the Transfer or Auxiliary our preferred filter is Ae-2azl Zinga we have recommended this filter for 17 Years and cannot recall and one using it with premature failure do to dirty contaminated fuel. The picture below are of My contminate fuel Purchased June 2013 , If I would not have had transfer filtration this would have destroyed My 2013 Ram 6.7 fuel system with only 213 Miles, it was the 1st Fill on the transfer tank. The Ae-3azl plugged 100% shut within 1.5 gallons being transferred to OEM Tank. Ae-azl filter should not be installed in direct injection filtration WITHOUT WARNING GAGE IN CAB, when it reaches its Max capacity of contaminates it will curtail the fuel 100% thus protecting HPCR components but at the cost of shutting down the engine WITHOUT WARNING.

Three-week-old aftermarket filters that allowed contamination to destroy all HPCR components.