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wmgeorge64

2014 and newer Mechanical Fuel Pump

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So my pre Owned GM Certified 2014 goes out of warranty in next couple of weeks.  How many issues with the mechanical fuel pump and failures?  I did a Search and nothing came up, which means no issues or I screwed up the search terms.

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Other than them being on the loud side, they are reliable.

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My 2014 has almost 90K on it and seems to be doing well.

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I did a little research on the whole system and it looks like  GM outsourced the design and mfg to another company. The high pressure pump sets under the intake manifold and seems to use the same hole the distributer shaft used. Looks to be a SOB to change out.

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I did a little research on the whole system and it looks like  GM outsourced the design and mfg to another company. The high pressure pump sets under the intake manifold and seems to use the same hole the distributer shaft used. Looks to be a SOB to change out.
The direct injec

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My high pressure pump went out at around 3k miles. It caused a low power limp mode. Dealer replaced in 2 days. If you look up the v8 cadillac and corvette 6.2 the high pressure pumps are an issue

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Have replaced quite a few on the 3.6's and 2.4's. Never yet on a 5.3 or 6.2

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18 hours ago, tbarn said:

Have replaced quite a few on the 3.6's and 2.4's. Never yet on a 5.3 or 6.2

So what kind of parts and labor cost is involved?

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Not sure. All the 5.3s I've done were under warranty. Didn't need to price it out. Would need pump, intake seals and intermediate fuel line .

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I know I am joining this thread over a year later, but just had mine done today and it was $775. It was throwing a P0172 & P0175 code (System Too Rich), the thing that should concerning to anyone getting this code is that you could be getting fuel in your crankcase like mine was and anyone on this forum knows that is Not a good situation!   

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I did a little research on the whole system and it looks like  GM outsourced the design and mfg to another company. The high pressure pump sets under the intake manifold and seems to use the same hole the distributer shaft used. Looks to be a SOB to change out.

The distributer hole that has not been included since 1997? The ls1 and up have no distributor “hole”.

 

 

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No hole in the block? It sure looked like there was one. so how are they driving the mechanical fuel pump?  I had assumed it was off the camshaft. 

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It is driven off of the camshaft, I'm old school, what was wrong with an external fuel pump like the muscle car era, if they leaked you didn't have to worry about fuel getting in the crankcase, it just dripped on the ground.

Edited by pumpr64

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1 hour ago, pumpr64 said:

It is driven off of the camshaft, I'm old school, what was wrong with an external fuel pump like the muscle car era, if they leaked you didn't have to worry about fuel getting in the crankcase, it just dripped on the ground.

Because the old school mechanical pumps were low pressure pumps.  The HPFP is doing 2200psi while a carb needs 8psi.  Does more really need said?

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