I have an 03 coupe and my installation was a little different. I'm not sure if the assemblies are different between the sedan and coupe. But mine was way different then yours for these aspects:

- Fuel pump is placed off to the side in its own section (not centered like yours)
- I did not have a jet pump (that was connected to any hoses at least)

Mine looks like this:



Just some input for people that may run into not having the same fuel bucket assembly as you.

 

Wow! That is really different. Did you put a Walbro in yours? If so, is the bottom of the bucket where the little nib sticks out of the fuel pump the same?

 

Thanks, you just saved me some money.

 

No, it is way different. All you have to do is shave off the tabs on the walbro, cut the rubber washer to fit around the bumps, and install the pump as if you were reinstalling the stock one. A little simpler then the fuel bucket assembly that the OP was using for this DIY.

 

Excellent post! Thanks Slider! I'm going to be doing this soon. . .

Can a mod please sticky this?

 

WOW where was this six months ago when I installed one in a coupe lol. Nice write up

 

nice job

 

wow....like the most complete/best write up i have seen good just..

 

How come my pump container(white) is different? The pump actually draws out of the container. Im having a hard time installing this walbro because it dooesnt fit right.
03' coupe
Any write ups for mine?
Thanks,

~Dv8

 

just out of curiousity, does the replacement of the pump actually end up helping the volume of fuel the motor actually sees?

With it being a returnless system, the fuel system is essentially voltage regulated and once you start to max out the pump in the factory systems, its my understanding that the pump circuits are getting overloaded and shutting down. now i could be completely off on this and if i am, please correct me.

By putting in a larger pump, i dont see the ecu being able to understand there is a larger volume pump in the car and it will still and suffocate the pump electrically? Did you upgrade the fuel pump circuit with a external 30amp relay and larger guage wiring, while installing the pump?

Either way, good on you guys for the DIY, helps others in this perdicament with a boosted VQ.

ps slider: did you ever head back to the dyno after the one i met ya at zensport? i was the guy that talked to you about your headers with the 03 DG coupe.

 

GJ! Thats looks different from mine too, did you drill out the regulator?

 

I was sold the wrong fuel pump!!! I got the correct one and installation using this DIY was a breeze.

Thanks.

~Dv8

 

You can see the effect of having a higher volume pump when you go to do the tune. I was only having trouble at the higher end when the pump was maxed out. The A/F ratio started going up at 6K RPM when my injectors were maxed out. Now there is enough pressure so the injectors aren't maxed out until 6800 and I could fix that with bigger injectors. (but I rarely go over 6,000 RPM so I'm not in a hurry to switch injectors)

I didn't go back to re-dyno because I wasn't really impressed with their work. They only adjusted fuel and completely ignored timing. I have all the tools to do it myself now anyway.

 

So I did the install and my fuel gauge isn't working..I didn't trim the "bump" on to the new fuel pump. Think that's y the gauge isn't working? Is my fuse bad? I didn't remove it or anything.