FS Single fuel pump conversion for LT5

[Flyman 27]

I will be leaving the country on Saturday & will not be back until Feb 5. I will not have access to the forum.
After you verify the info above, if the relays are new & the amperage is appripriate being drawn from the pump. The most likely culprit I can think of is the plastic fuel line clamp at the Fuel Pump. That would limit the max pressure the system would see.
Haven't seen one break yet, you would be the first, but it is more likely than a turbine pump failing.
IF The clamp has failed, replace it with a narrow steel clamp, don't overdo it & don't use a heavy clamp. You will break the pump trying to tighten it. The nozzle on the pump is not torque tollerant. Be very careful.
I am confident that you are experiencing one of the above issues. I have not seen one of these pumps fail yet and some guys have tons of miles on them.
IF you DO have a failed pump, I will replace it for you when I get back.
Please update theis forum or send me a PM on what you are finding.

These are the FP Relays I have been recommending and people have had good results with:
https://www.amazon.com/gp/product/B0...KIKX0DER&psc=1

[TallySpeedRacer]

Dan,
After the first attempt at repair we replaced the secondary solenoid and fuel pressure regulator only because one was available. Upon start up we could only muster 31-32 psi at idle, and about 38 psi at 3500 rpm.
After removing your pump we did notice the clamp on the line connecting to the pump was broken, couldn't tell you if that happened on installation or removal.
Aaron Scott who is more of a corvette purist wanted to put two new Delphi pumps on the original assembly and clean up the faulty sending unit as this was the reason for replacement in the first place. So, after rebuilding and installation we were able to attain 42 psi at idle and 51 at 3500 rpm. We tested the car on the road and had the secondaries kick in without interruption or fault codes. The gas gauge also seems to be working for the time being.
I don't recall Aaron mentioning if he tested your pump for amp draw so I can't tell you if that was a problem.
I'm sorry I couldn't isolate a specific problem for you but do appreciate your feedback in helping me along the way.

Andre'

[Flyman 27]

I don't get it. I must be missing something.
I figured out that the only thing I could think of that could cause what you were seeing would be a broken fuel hose clamp at the pump output.
The mechanic removed the sending unit & found a broken fuel hose clamp at the pump (like I figured) & decided to replace the whole unit anyway? For a 50 cent broken hose clamp?

[sgentilella]

Are these still available? If yes, what is the lead time and payment options

Thanks

[Flyman 27]

I have 1 in stock now, don't delay if you need it.
After that it will take 7-8 days to get more materials in.
I sell them on ebay for an easy, secure transaction.

https://www.ebay.com/itm/166637693615

[RUSSELL]

you wouldn't happen to be making any of these any time soon would you.

[Flyman 27]

Just leaving on vacation.
Will be back next Friday.
I will have 2 ready to shi at that time.
On ebay.

Dan Merrill

[green91ZR-1]

Purchased your fuel pump and had a local garage install it because the rebuilt fuel pump I tried got stuck during installation. Your pump got my ZR-1 running again. Problem now is it stumbles a bit if pushed hard with my vallet key turned off. It stumbles and acts like it is not getting any fuel at times with the valley key turned on. Any suggestions regarding what I did wrong?

Bruce Dickey
1102 Brown Cir
Rhome, TX. 76078
mbrucedickey@gmail.com

[Flyman 27]

Sorry, I did not get a not of your message, didn't see it.
Was the installation complete? Was the ECM terminal disconnected? This allows the power from the secondary circuit to add power to the single pump. Each single circuit supplies a max of 10A, the single pump can pull up to 17A under full power conditions, it needs both circuits.
Also, the second Fuel Pump relay or fuse may have failed or the relay is intermittant.

Let me know what you find.
Feel free to DM me, I am sure I will get the message then.

Dan

[aod]

The eBay link no longer works to purchase these and I have sent a private message to Flyman 27 last week but have gotten no response. I would like to get this fixed before Winter is here if possible. Does anyone have one of these setups they would like to part with?

Thanks.