http://www.exoticperformanceplus.com...Car.php?car=40

We had installed the ECS fuel system on a customer's 2004 Corvette, shown in the above link. The ECS in line pump seemed a little on the loud side, and as I was driving this Corvette back home to it's customer, which was a three hour plus road trip each way, the ECS pump quit working after having stopped to refuel my chase car. ECS keeps the stock pump in the system, so I wasn't stranded. I noticed the pump quit working as we had installed a fuel pressure gauge in a pillar pod, along with a boost gauge. Fuel pressure had reverted back to the standard 58 psi at idle, and then would drop when giving it gas.
ECS very quickly sent us out fittings overnight, to move the pump behind the left rear inner wheelwell. ECS said several other of their customers had recently reported the same problem, apparently from heat soak. They also included a picture of where to mount the pump in this new location. The fuel pump still sounded like it was a little too noisy, and we drove this Corvette to the North/South shootout, just in time to see everyone leave as it was raining... When I fired the car back up at the track, the pump again wasn't working. ECS quickly sent us out a new pump, which we installed. It really sounded like the new pump wasn't any quieter than the pump it replaced. We experimented with lowering the pump to the very bottom of the wheelwell, which took care of the problem. The pump is now much quieter, and only gets loud if the fuel level is left to get down to an 1/8th of a tank. I do not recommend letting the fuel level in a forced induction vehicle get this low, but I wanted to see what would happen with this particular combination. As soon as I refilled the car, the pump quieted back down. This was after driving the car for three hours, so I know it did the job.
ECS was extremely helpful during this whole process, and their fuel system is a very nice assembly that allowed us to push this Corvette past the 600 rwhp level that we were limited to, prior to the new fuel assembly. Bob

 

Thanks for the update!

 

Not a problem, hopefully what we went through and found out will help other people as well. I put a lot of long distance miles on this C5 with this fuel system, which probably was what uncovered the problem. Bob

 

Sorry, that seems kinda shitty to have a pump fail 2x because it was heat soaked. Sounds to me like a crappy pump. After having 2 fail, I would be damn nervous to drive around with a 3rd.

I would personally rip that bitch out and install something else aftermarket. What brand pump do they include?

 

Its a Bosch fuel pump...

 

that ecs fuel system is second to none!!

 

It's not the pumps fault, it was merely a case of the pumps location. We still have the 2nd pump in the car, we never needed to go to a third pump, we just had to relocate the 2nd pump lower in relation to the fuel tank, so that it stays full of fuel. We think the original two locations where the pump was located caused it to get a form of vapor lock after it was driven a long distance and then shut off. The pumps were always louder in these first two locations, so they were most likely not getting a good supply of fuel. Bob

 

so what happens if the stock fuel pump goes out or the stock fuel filter gets clogged? wouldn't it be better to take them out of the picture copletely in order to avoid this?

 

Which Bosch pumps are they?

My 420L's can be heard from next to the car a little but not like my old Weldon 2025 which sounded like a U-Boat siren.

 

I'm glad the stock pump was still in this car, or it would of needed towed. With two pumps you stand a chance that one will still be working. As long as the car has a fuel pressure gauge, you can monitor that both pumps on this system are working. Bob

 

A U Bolt siren, how old are you? lol
I believe this one is a 420L. Bob

 

In the Gn's we used the GFP214, it was loud, but I mounted them on a muffler hanger to isolate the sound and vibration. The solved most of the issues.

In other cars (like the GN) I've found my best results were to remove intank pumps as the tend to restrict the other pump, and often lead to failure.

 

the ECS fuel system is second to none; looks like something from an F16

 

The fuel rails and plumbing do look cool. Bob

 

that makes sense. also would make it easier to service or change anyting and not have to wory about going into the tanks.

 

Thats true. Bob