LML Cp4 replacement before failure

clrussell

clrussell

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Sep 23, 2013
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So I programmed a truck this weekend for a good friends dad. We got to talking about cp4 failures and what all they entail after.

I did a quick google search and really didn't find what I was looking for.

Basically want to do replace the cp4 before it takes a crap and takes out the injectors since the truck has 125k on it and as far as we know it's never been touched.

We don't really want to have to do a cp3 conversion on it unless we just have to. Truck is tuned and deleted just to get rid of dpf/ def issues.

Are the replacement cp4s still problematic? Or have they pretty much fixed the failure point in them? If not, does anyone make a replacement cp4 that solves the issues? Say exergy or whoever?

Thanks. Sorry if it's been covered before.


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elliottw

elliottw

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Jan 23, 2013
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They haven't fixed it yet. I do more 11s and 12s but have seen more than 1 13+ with a bad pump. If I ever got an lml for sure without a doubt I'd cp3 swap it.
 
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$chultz38

Member
Jan 22, 2009
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FYI- I think that the kits that are available require removing the egr but no 100% sure on that.
 
clrussell

clrussell

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Sep 23, 2013
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Thanks guys, I'll pass on info and do some research. We don't mind to delete the egr while we are there if need be. Although I'm sure kits are cheaper if you can leave it. This thing is just a stock truck he wants to last him a while.


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clrussell

clrussell

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Sep 23, 2013
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Also, if the kits don't come with a pump we just need a lbz/ Lmm cp3 correct?


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$chultz38

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Jan 22, 2009
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Yep lbz/lmm pump. Cost has nothing to do with what I said about available kits, I don't the cp3 pump fits with the egr in place.
 
whytry

whytry

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Oct 11, 2010
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In my opinion it's cheaper to fix a failed pump them to swap in a cp3.. Cp3 retro kits are unreal costs especially to a guy that has a stock truck
 
Awenta

Awenta

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Sep 28, 2014
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whytry said:
In my opinion it's cheaper to fix a failed pump them to swap in a cp3.. Cp3 retro kits are unreal costs especially to a guy that has a stock truck
Click to expand...
2k for a conversion or 6k to replace everything when the cp4 gives out?

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Awenta

Awenta

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clrussell said:
I was thinking so. I'm sure Tony can handle it.

Looks like we are on the search for a kit


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Click to expand...
Fleece. Comes with a cp3k and I think it's less than 2k

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whytry

whytry

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Awenta said:
2k for a conversion or 6k to replace everything when the cp4 gives out?

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Click to expand...

Not sure where you got your figures pal
Tuning =1k
Egr delete = 800.00
Cp3 = 800.00
Conversion kit= 800.00
Exhaust= 400.00

Cp4 =550.00
Lml injectors = 2000.00
Pressure reg = 250.00
Where are you people getting 6k for parts to fix a failure?
 
whytry

whytry

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Can't do a conversion with out egr removal tuning and conversion kit ....not everybody buys diesels and wants to spend 4k on deleting everything
 
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