Fuel Pump questions

[COS80]

That's probably due to this:

Denso not producing Fuel Pumps

I was looking to replace my wife's Corolla fuel pump and tried very hard to find a Denso replacement. After some time I noticed that Denso is not selling fuel pumps anymore, perhaps there is only a residual stock and this is why: https://www.denso.com/global/en/news/newsroom/2022/20220117-g01/...

forum.ih8mud.com

 

[baldilocks]

Aisin was original. I got an Aisin for $100 from CruiserParts.com in New Hampshire close to ten years ago. Finally installed it five or so years ago. It’s a tough thing to do, I know, but if I was looking to replace my fuel pump now I’d bite the bullet and get that Aisin part number that I posted earlier or get a pump through a Toyota online parts seller and save 30% off the dealership price. Most likely the same pump.

 

[Tyland Cruiser]

If the OEM pump lasted for 20+ years, it would seem worth it to replace with OEM, rather than rely on some whiny aftermarket that might leave you stranded someday. Fuel pumps tend to go bad without much warning.

 

[COS80]

Aisin was original. I got an Aisin for $100 from CruiserParts.com in New Hampshire close to ten years ago. Finally installed it five or so years ago. It’s a tough thing to do, I know, but if I was looking to replace my fuel pump now I’d bite the bullet and get that Aisin part number that I posted earlier or get a pump through a Toyota online parts seller and save 30% off the dealership price. Most likely the same pump.

I'm not really worried about the price tag as much as the "what if"... what if this engine actually needs the higher flow rate?

I've seen a bunch about lean conditions and ping with superchargers, but I just saw something that seemed to indicate this was only a problem on 93-94s. Is that right?

 

[COS80]

If the OEM pump lasted for 20+ years, it would seem worth it to replace with OEM, rather than rely on some whiny aftermarket that might leave you stranded someday. Fuel pumps tend to go bad without much warning.

To be fair, I have no idea how long the original lasted. Mine came this way.

Regardless, it's got to go because of exactly what you said. My F-150 acted funny one day, made fuel pump noise the next, and died literally two minutes after I first heard the noise. This one's been noisy for almost two years. It's got to go.

Trying to decide if the standard pump is suitable or if I ought to do the Supra upgrade.

 

[baldilocks]

I'm not really worried about the price tag as much as the "what if"... what if this engine actually needs the higher flow rate?

I've seen a bunch about lean conditions and ping with superchargers, but I just saw something that seemed to indicate this was only a problem on 93-94s. Is that right?

The TRD super charger boosts what? 5psi? Your injectors can flow only so much fuel and the stock pump surpasses their maximum demand capability for a margin of safety. This is common practice. Under 10psi can be handled within the parameters of the factory set up. I’m about to turbo charge 7.25psi into my 1996 build that’s going on currently. This kit has been run on the stock test donkey in CO for a couple years with great success. The 80 has built in reserve capacity to cope with lower boost set ups.

 

[toy_tek]

Depending on the noise, you may have a pressure/regulator issue. Here is my experience- may or may not be helpful in this case.

Post in thread 'Fuel pump questions: LRA / 3FE -> LS'
Fuel pump questions: LRA / 3FE -> LS - https://forum.ih8mud.com/threads/fuel-pump-questions-lra-3fe-ls.1351532/post-15833146

 

[COS80]

Your noise was very different from mine - much higher-pitched - but I do think I need to install a fuel pressure gauge and get some data. I have to figure out how it installs on this engine.

 

[Tyland Cruiser]

To be fair, I have no idea how long the original lasted. Mine came this way.

Regardless, it's got to go because of exactly what you said. My F-150 acted funny one day, made fuel pump noise the next, and died literally two minutes after I first heard the noise. This one's been noisy for almost two years. It's got to go.

Trying to decide if the standard pump is suitable or if I ought to do the Supra upgrade.

I just had a new Magnuson SC installed (by our mutual good friend at Precision Land Cruisers). No fuel pump upgrade needed. The OEM pump should be fine.

 

[Fj80oregon]

Denso 950-0226 for the gx470 and 08 4Runner is what I have run in three Fzj80 turbo trucks. It’s cheep and works great. It is a higher flow pump which as stated doesn’t affect much with the limits of your injectors. A good alternative for denso guality.

 

[COS80]

I just had a new Magnuson SC installed (by our mutual good friend at Precision Land Cruisers). No fuel pump upgrade needed. The OEM pump should be fine.

Any pinging? Have you run to redline or done a long uphill climb yet?

 

[COS80]

Denso 950-0226 for the gx470 and 08 4Runner is what I have run in three Fzj80 turbo trucks. It’s cheep and works great. It is a higher flow pump which as stated doesn’t affect much with the limits of your injectors. A good alternative for denso guality.

I can find that pump still available. Might be a really good way for me to go.

 

[Tyland Cruiser]

Any pinging? Have you run to redline or done a long uphill climb yet?

No issues. Runs like a top. I am still taking it easy, though, as I also have a new (rebuilt) engine. My fuel injectors are brand new OEM (not larger or modified ones) sourced directly from Toyota.

 

[Fj80oregon]

 

[landtank]

I just bought a denso pump as the truck has 335,000 on it

Denso 951-0001

 

[COS80]

I drove the truck today until the low fuel light came on, and I still was able to put 20 gallons in the tank. Is that normal? Five gallons seems like a lot left.

I was very pleased to hear no hiss - nothing - when I removed the gas cap. It was cold and I started with only 1/4 tank on the gauge, so this isn't really conclusive, but it's a mighty good sign!

Pump is still noisy, just as someone predicted. This video is from last summer and you can really hear it singing.


This is today. Not sure why it sounds like it's pulsing/tapping... that's not real.

 

[baldilocks]

The gas light comes on with 5 gallons remaining

 

[COS80]

Good to know. That will save me the expense of replacing the sender, which I thought I needed.

 

[NeverFinis]

I drove the truck today until the low fuel light came on, and I still was able to put 20 gallons in the tank. Is that normal? Five gallons seems like a lot left.

Working as designed.

This is today. Not sure why it sounds like it's pulsing/tapping... that's not real.

It almost sounds like a relay is rapidly clicking on/off. Is that sound really coming from the tank?

There are fuel pumps that do make clickety sounds, but they tend to be very cheap low pressure and low volume pumps.

 

[COS80]

It almost sounds like a relay is rapidly clicking on/off. Is that sound really coming from the tank?

There are fuel pumps that do make clickety sounds, but they tend to be very cheap low pressure and low volume pumps.

The whine is, but that clicking sounds doesn't exist.