mavthegreat725

cost to replace fuel pumps on 2008 automatic? I experienced a "random loss in power upon crank" twice, and then then engine light turned on and hasn't turned off. Autozone pulled the codes, and I got the fuel pump error code. Also hearing some strange noise from the exhaust, sounded like a supercharger, though the car is naturally aspirated albeit for a cai. I'm thinking all signs point to fuel pumps.
no loss in power while driving, just the loud weird noise at 1800RPM+.

CMY SIX

pump is like $350, put a Z06 pump in while your at it

mavthegreat725

why z06 pump? increased performance?

unclecookie

First of all, if I were you, I would take the car to either a dealer, or to an independent shop that has experience with working on Corvettes, and have them diagnose the actual problem. That being said, I had my driver's side fuel pump and tank replaced at the dealer because of the dreaded "gas smell". My car is also an 08 with A6, and it cost me $3000. However, I had mine repaired last year, and from what I hear on this forum, there is a National Backorder for the GM C6 fuel pumps, and some have been waiting for months to get their cars repaired.
Because of the expense of the fuel pump replacement, I would make sure that is the actual problem before throwing parts at my car. JMHO

wayback

Dealer charge was $2500 for my 07 A6 under warranty. A6 has to be dropped to get to pump.

I would go have it checked out first.

CQRT

With the tow and diagnostics and replacement on my C5- it ran close to $900 . . .

extrapilot

This is good advice as I've read on this forum of issues that turned out NOT being the fuel pump.

obone

My 2008 has been in the shop for 6 weeks and I'm told that a Z06 pump will not work.

Seadawg

You need to go to another shop then, because I have a 2011 LS3 (the same engine as yours, and it came from the factory with a Z06 pump.

The reason I know is I personally took pictures of the part numbers, I was going to have the dealer upgrade mine (at my cost) while they were replacing a bad fuel sensor under warrenty. I have another thread out here with all the details too (pics, part numbers of the different versions, etc.)

They showed me in the dealer manual that they are interchangable too, and many out here have installed the Z06 (LS7) fuel pump in their LS3's.

AORoads

Second or third the motion: make sure you get someone to thoroughly check the problem. Usually, an initial diagnostic test leads to a set of paths to eliminate other issues. I knew the overall replacement was high, but the numbers quoted in this thread put it into real-dollar perspective! As said, don't just throw parts at it because "it seems like the right thing to do."

Orion2011

You make is sound so simple!

v26278

My fuel pump died with no unusual noise, and no "fuel pump error code". I did get the P0171 and P0174 lean codes and progressively worsening engine sputtering and stalling.

Your pump might be fine, it could be a bad relay, bad injector, or some other issue given the noise you're hearing. As others posted above, get it properly diagnosed before you throw parts and money at it. Its best to follow the service manual diagnostic procedure for whatever code and symptoms you have, which likely involves checking voltage through the circuit to the pump and fuel pressure from the pump.

BigMonkey73

Is there a Corvette performance shop with certified GM mechanics who can check it out and maybe do the work for you?

If you're out of warranty, might be worth a shot

Bruze

Disclaimer: I know nothing of modern FI systems, and I'm not a betting man, but I would bet that putting in a more powerful fuel pump will give you zero more horsepower or any other advantage.

When I was young we would put electric fuel pumps in our mostly stock cars, thinking "Hey, more pressure, more gas, more power." Pretty simple.

But all the pump did was supply more pressure to the carb. Once the fuel got past the float valve to the float bowl it was at atmospheric pressure and the fuel pump was out of the equation. From there it was sucked into the engine on demand.

As long as the float bowl(s) were kept full, that was all that was necessary. Soup the engine, add more carbs, then you may need a bigger fuel pump. Otherwise, it did nothing.

I'm guessing that modern FI systems get all the pressure/volume of fuel they need, and adding more pressure or volume will do absolutely nothing to a factory engine.

But I could be all wet too.

CQRT

Clearly, the shop that has the car is incapable or inexperienced with Corvettes and may end up doing more damage than good in the long run. Six weeks is ridiculous - - six hours would be a lengthy repair.

Although slightly different in design, the fuel pump on my c5 ran about $800 including the tow.

mracer

FWIW, the thinking is that the z06 pump is more "robust", willing to operate at more extremes that the LS2/3 might expose it too? Possibly another layer of security.......
ymmv
mike

Bruze

That's entirely possible.

Mike's LS3

Your were informed incorrectly. My 2008 had a C6 Z06 fuel pump installed by Abel Chevrolet, it is a drop in fix!

Bruze

What's the upside?

Mike's LS3

As modifications are made to an engine, fuel demand is increased. The Z06 fuel pump does a better job in keeping those demands than the stock pump. No horsepower gain, but the ability to sustain fuel pressure demand is critical. Running out of fuel at the upper rpm will lead to a lean condition that will cause engine destruction.

Your comparing apples to oranges with carbureted engines and fuel injection. Flow rates are completely different.

Carbureted engines require 5-7 psi of fuel pressure.

Fuel Injected engines around 58 psi.

Direct fuel injection around 2100 psi.