100 Series VVTi Fuel Pump (‘06-‘07)

[NoTempoLimit]

Hey Guys,

Just swapped the fuel pump on my 2006 LandCruiser. And it had a bit of a surprise waiting. As you can see on these VVTi equipped LC’s, the fuel pump is held in a plastic cage, unlike the earlier models.

The Denso pump I had ordered worked fine. In fact it looked identical to the old one and had the same part number. It is in the truck and running fine.

The strainer I had ordered (and I recall it was difficult to find that part), was clearly meant for the older mode and was completely incompatible with the plastic cagel. So I had to re-use the original strainer. I cleaned it as best I could with electronics grade isopropyl alcohol spray and compressed air.

The photo below shows the assembly after cleaning just before it was re-installed in the tank.

One thing that surprised me: I expected to see some “crap” at the bottom of the tank. My LC is 19 years old and has 183k miles. But the tank looked very clean. I could not see any debris or contamination.

The fuel pump replacement is preventative. I had two instances of the dreaded vapor lock issue last summer in 104ºF+ weather. I know that just replacing the pump will resolve the issue, but I felt it was worth doing. It takes longer to get to the pump access hatch than it does to swap out the fuel pump.

If anyone has the part number for the correct lower cage assembly with the strainer, please let me know.

Thanks!

 

[Trunk Monkey]

Looks like it comes as one piece.

 

[NoTempoLimit]

Looks like it comes as one piece.

View attachment 3884212

Thanks! I assume that’s just the cage without the pump inside. What’s the 5-digit prefix for those part numbers?

 

[Jack90210]

Thanks! I assume that’s just the cage without the pump inside. What’s the 5-digit prefix for those part numbers?

23220-50160 "Fuel Pump and Strainer Set"

Took some doing to find, it's not listed on PartSouq for that vehicle.

 

[Rhetoric]

Thanks! I assume that’s just the cage without the pump inside. What’s the 5-digit prefix for those part numbers?

It's not just the cage. It only comes as one assembly.

2322050160

It's listed for 06-07 LC and LX on Partsouq

 

[Jack90210]

It's not just the cage. It only comes as one assembly.

2322050160

It's listed for 06-07 LC and LX on Partsouq

Well jeez, thanks for that! I often can't find '06-'07-specific parts on the Souq, I must have the wrong vehicle search parameters set up.

 

[Rhetoric]

Well jeez, thanks for that! I often can't find '06-'07-specific parts on the Souq, I must have the wrong vehicle search parameters set up.

It helps that I have my 07 LX and an 06 LC set up in the system already.

 

[NoTempoLimit]

It's not just the cage. It only comes as one assembly.

2322050160

It's listed for 06-07 LC and LX on Partsouq

Thanks for the link! So its $445 for an OE kit with pump, plus shipping from UAE, and the de minimus (site insists on correcting my spelling), tariff exemption is gone, at least for the time being.

I do remember calling a Toyota dealer in Denver after my first heat induced shut down (happened on I-15 in CA in July 2019), and the price was around $300. So it has gone up substantially.

Going to stick with what I installed yesterday. I paid $126 for the Denso 950-0210 pump kit back in Aug 2021. I suppose I'll have to hope that it was OK to re-use the strainer. It did not appear damaged and I cleaned it with isopropyl spray and compressed air.

Just want to note that if the fuel pump is identical and only the mounting differs on the 2006-2007, then it is unlikely that the fuel pump is the root cause of the hot weather shutdowns, or it would happen to the earlier models. Replacement does make sense from a preventative maintenance perspective. I do recall 2001LC 's theory that some of the 06-07 pumps were defective.

I'm also planning to do some heat insulation on the fuel line and relocate the fuel pump resistor ahead the radiator so it gets the ambient air temp, rather than the air heated by the radiators and the engine. Also in its stock position the resistor is in a place where hot air will collect, unless it is sucked out by low pressure under the truck, which of course is greatly reduced at low speeds and nonexistent when stopped.

Also - has anyone considered insulating the fuel filter? The fuel slows down going through the filter which could potentially cause the fuel to absorb more heat.

FWIW, the sound and response of the 2UZ engine after I pulled the fuel pump relay (stopping the fuel pump to reduce pressure prior to servicing) was nearly identical to how it responds to the heat shutdown problem. First a great reduction in power, then rough running, then cranking with no start.

 

[Rhetoric]

$267.71 shipped from a SE Toyota dealer with 1 day left on the 25% off sale.

 

[2001LC]

Todate, every 06-07. I installed fuel pump in, over the last ~7 years. With either OEM (only way I found, to get sock) or Denso fuel pump (no longer made by Denso). Along with new OEM fuel filter. Corrected the so called vapor- lock, which it is not. I've never, altered fuel pump resistor in any way, nor used any installation or shield.

 

[NoTempoLimit]

Todate, every 06-07. I installed fuel pump in, over the last ~7 years... Corrected the so called vapor- lock, which it is not.

Good to hear! When you say "Denso fuel pump (no longer made by Denso)" do you mean it is unavailable, or that Denso outsourced the manufacturing of it? The pump I installed (I got the part number from a post of yours) was identical in appearance to the one I removed.

 

[2001LC]

KARIYA, Japan (Jan. 17, 2022) – Leading mobility supplier DENSO, and powertrain supplier Aisan today announced their respective Board of Directors have agreed upon and signed an agreement to transfer DENSO’s fuel pump module* business to Aisan. In addition, the Board agreed to allow Aisan to acquire DENSO’s equity stake in KYOSAN DENSO MANUFACTURING KENTUCKY, LLC (KDMK), located in Mt. Sterling, KY. The transfer is estimated to be on August 1, 2022.

DENSO and Aisan Reach Agreement on Transfer of Fuel Pump Module Business | Newsroom | News | DENSO Global Website

You can see "DENSO and Aisan Reach Agreement on Transfer of Fuel Pump Module Business ". DENSO continues to develop technologies that support a better life for all.

www.denso.com

Note: Aisan, not Aisin. Which we've a thread in mud talking about.

 

[2001LC]

Who is this OEM fuel pump manufacture

Guys I can't read this. Can someone help me out. What is this spelling? I See A---m or A--am? Purchased from Toyota USA dealership Feb 2024. Fuel pump OEM 98-05 What is the spelling and Who is this?

forum.ih8mud.com

 

[NoTempoLimit]

Todate, every 06-07. I installed fuel pump in, over the last ~7 years… Along with new OEM fuel filter. Corrected the so called vapor- lock, which it is not.

What do you think the root cause of the high temperature shutdowns on ‘06-‘07 LC/LX? I’m still having a hard time understanding how the truck passed hot temperature testing.

I have been thinking lately that I can’t buy into the “heating of the gas tank by the exhaust” theory, because there is just too much mass of gasoline in the tank for it to be heated so easily. It also seems to me that it would be a huge failure of Toyota engineering if that were the case.

As an extreme example: The Lockheed A-12 / SR-71 aircraft used its fuel as coolant. There were no fuel bladders, the fuel was in direct contact with the titanium skin of the aircraft, which got to 500-600ºF at Mach 3.3. Yet the mass of the fuel stayed cool enough to be used to cool the cockpit and electronics / cameras.

BTW, thanks for recommending the Denso pump to me. I ordered mine in 2021 so I got one of the last ones.

 

[Rhetoric]

What do you think the root cause of the high temperature shutdowns on ‘06-‘07 LC/LX? I’m still having a hard time understanding how the truck passed hot temperature testing.

I have been thinking lately that I can’t buy into the “heating of the gas tank by the exhaust” theory, because there is just too much mass of gasoline in the tank for it to be heated so easily. It also seems to me that it would be a huge failure of Toyota engineering if that were the case.

As an extreme example: The Lockheed A-12 / SR-71 aircraft used its fuel as coolant. There were no fuel bladders, the fuel was in direct contact with the titanium skin of the aircraft, which got to 500-600ºF at Mach 3.3. Yet the mass of the fuel stayed cool enough to be used to cool the cockpit and electronics / cameras.

BTW, thanks for recommending the Denso pump to me. I ordered mine in 2021 so I got one of the last ones.

Love a good SR-71 reference.

The truck could have passed the testing during design / certification.

Perhaps there was a bad batch of fuel pumps that have an issue when going from high speed to low speed.

Perhaps the age of the pump is a factor. The "newest" truck is 18 years old this year.

Perhaps a combo of both.

 

[NoTempoLimit]

Love a good SR-71 reference…

I think that makes sense. I’m still going to insulate my fuel lines in the engine compartment. Already bought the material, and its not that much labor time, and if nothing else it may help power slightly by keeping the fuel cooler so it extracts more heat from the charge air when injected.

The last time I drove in high temps (I-40 in CA in July, saw 118ºF) I could swear I felt the power was reduced. It felt similar to approaching the Eisenhower tunnel but not as pronounced. If the charge air is hot, ignition timing has to be retarded to prevent pre ignition.

 

[2001LC]

What do you think the root cause of the high temperature shutdowns on ‘06-‘07 LC/LX? I’m still having a hard time understanding how the truck passed hot temperature testing.

I have been thinking lately that I can’t buy into the “heating of the gas tank by the exhaust” theory, because there is just too much mass of gasoline in the tank for it to be heated so easily. It also seems to me that it would be a huge failure of Toyota engineering if that were the case.

As an extreme example: The Lockheed A-12 / SR-71 aircraft used its fuel as coolant. There were no fuel bladders, the fuel was in direct contact with the titanium skin of the aircraft, which got to 500-600ºF at Mach 3.3. Yet the mass of the fuel stayed cool enough to be used to cool the cockpit and electronics / cameras.

BTW, thanks for recommending the Denso pump to me. I ordered mine in 2021 so I got one of the last ones.

Bad batch of fuel pump motors. We don't see all 06-07 fuel pumps fail. Some of these fuel pumps, are found bad mile one. Others we see fail, much later. Others I've seen over 250K miles, still working fine.