Fuel Pump Options, Delphi or DW?

Went camping over the weekend and towing the trailer resulted in some surging and lean codes under high loads on the way home. It ran great on the way down, but I am guessing I asked too much from it. All issues point towards replacing the pump. I can get a drop-in Delphi FE707 for a couple hundred, OEM Toyota for about $300. Are there any better options like running a Deatschwerks 255 or other similar aftermarket pump setup? Back in the day we just slammed Walboro pumps in everything. Truck is mechanically stock and flex fuel, I have no plans for performance upgrades.

 

I would stick with OE Toyota. If Denso had one available, those are usually ok and might save a few dollars.

The aftermarket brands are hit and miss.

Are you sure about the cost for OE Toyota? Can you share the part number? I thought the flex fuel pump assembly was much more expensive than $300.

 

The Deatschwerks pumps are great a few of the supercharger kits come with them. No issues

 

Are you sure it's not just that regular alcohol density issue, since yours is flex fuel?

 

Definitely worth checking the fuel alcohol percentage. That would be good for OP if he could get out of replacing the pump.

If pump replaced, fuel alcohol % and fuel trims need to be reset if the % crept up and caused the pump to overwork and fail.

OP mentioned lean codes, rather than running rich, which I believe is the tell on the flex fuel truck issue.

 

Yes I have a scan tool and reset the alcohol density setting a few weeks ago, percentage shows 0% currently, might be a fluke with the scan tool. I am pretty confident the surging and lean codes would be from a failing fuel pump and not the alcohol density issue.

I just watched some videos Viktor posted and it looks like the FFV fuel pump he tested flows about 450lph which is crazy for a stock pump. I am confused now as he shows two different pumps for normal gas and FFV. When I look up the parts online Toyota shows a single pump that fits both FFV and Gas models. https://parts.ourismantoyotaofrichm...yYSZ5PTIwMTUmdD1saW1pdGVkJmU9NS03bC12OC1mbGV4

Tempted to get a Walbro/Deatschwerks 450 and be done. @reywcms I see you have a 450 Walbro, any tricks with the install or was it a drop in?

 

Flex fuel pump has two stages. First is normal flow for E15 and lower; second stage is for higher ethanol.

 

I would expect that would be controlled by the module, the pump is just a pump, or at least it should be.

 

Drop in with slight modding to the lines, wiring and filter. Nothing major. The DW 340 is plug and play.

 

Yes, but the actual pump has to be rated for the higher output than the non-flex fuel pumps. That's all I meant. May explain why the FFV pump that you saw tested at 450 lph.

 

Any luck on swapping it out yet? Curious which one you go with and how it does.

 

You can definitely drop in a DW300c and it will provide the fuel needed. The FFV fuel module in high psi mode is almost equivalent of being hard wired for max voltage/amperage. It's rated up to 80psi and will drop right in the FFV basket.
If wanting to use the Walbro 450 ensure you get the model 267 for a decent fit with no trimming or modding.

 

Good to know, thanks!

 

Went through a fuel pump debacle the last couple days, but ended up with a DW 300c and bypassing the donut filter. I had both an Aeromotive and the DW in my hands but ended up installing the DW. I wanted to like the Aeromotive but I had a bad experience with one of their fuel pressure regulators back in the day and just couldn’t trust it. I was hoping to use the factory style corrugated hose and purchased several different sizes but nothing worked with either new pump as the outlets were 9mm vs 10mm of the factory pump. If I could have found a hose with 9mm on one end and 10mm on the other it woukd have worked out. Ended up using a 5/16” rubber submersible fuel line from Gates and bypassing the donut filter as there is no way that rubber hose would bend 180 degrees and not kink. It was a bear to get on the 10mm nipple, but worked in the end. Also some nasty gunk was coming out of the filter so I am glad I bypassed it. I still need to get an external filter put on, but I am happy to be back on the road in time for work to start.

 

Good to know, I'm about to drop in the same pump. Was your new hose just not long enough to make a smooth loop?

 

You can use a heat gun to gently to heat the plastic tube to fit over the nipple. I like using injector clamps instead of hose clamps.

 

No it was plenty long, there just isn’t enough space to make the bend. I didn’t try heating up the 9mm plastic hose, I thought about it and figured it wouldn’t work out so that is good info.