Hi everyone, so my (used) Denso fuel pump is kaput - very disappointing. As a result I am now thinking of buying a NEW replacement this time and I am looking for some advice on what maybe a good, reliable brand. The one I have my eye on is a Delphi FE0486. Can anybody advise me on this or suggest another brand?
I'm pretty darn tired of removing that back seat

Thanks in advance for your suggestions....

 

the general words of wisdom will be: it won't be cheap ($300 from Amayama), but if you want to stop removing the back seat, put a new OEM unit in there. Denso is the OEM manufacturer here.

More pertinent question would be is the pump actually dying? What are the symptoms and what tests have you done.

See this thread for more info:
https://www.clublexus.com/forums/ls-...puter-ecu.html

 

Yes Fanboy I can guarantee the pumps are actually dying. They are seizing up and I really don't know if it's because they are used pumps or what. It's very frustrating, I can assure you. That's why I have decided to get a new one even if it's expensive. I know that Denso or Aisin are the OEM pumps but they are no longer available new for my 1993 Celsior so I'm looking to find a proper substitute. That's how I came up with the Delphi. Can you tell me what kind of pump I should go for and where I can get one?

I read the thread you posted and I'm familiar with that fuel pump control module since my car has one too. Yamae told me how to check it but I am not getting the voltages he said I should get so I have bought another (used) one that I should have by next week. But I would still need a pump as the one in the car is . No output.

 

https://www.amayama.com/en/catalogs/...tion-system-49

https://www.lexuspartsnow.com/parts-...tml?pnc=23220P

There are four part numbers listed here, 50010, 50020, 50040, 50050, and I'm not sure what the differences are. And 50050 is discontinued.

Amayama is a bit weird with their Japan warehouse, >1 means they need to order it from the supplier and it may? be out of stock. You won't know unless you ask\order.

I see now the questions you asked Yamae . I hope the used unit solves your problems and you don't need to buy these quite expensive OEM units.

 

Morning Fanboy, well you sure came through for me there. I really didn't think those pumps were still available. Thanks a whole lot and I appreciate your effort trying to help me out. But now I'm in the position where I have to decide whether it makes sense to put such an expensive pump in that age car.

Do you by chance have any cheaper alternatives? What about the Delphi pump I mentioned?

 

There is also a Bosch pump available - any suggestions?

 

Sorry I don't know anything about if there are good quality alternatives.

 

That's ok bro. You more than did your part to help me out. Thanks a lot yet again. My research up to now is telling me that the Bosch is probably a better bet than the Delphi so I may go that way.

Hoping for the best
Cheers...

 

The question has probably been answered before. The built-in search for this forum is useless, so, just use google.

https://www.clublexus.com/forums/ls-...l#post11539002

 

Oh yeah Fanboy, you're the gift that keeps on giving . I will most certainly try that search tip and thanks again one more time.

Anthony

 

It is not the often case that Denso's fuel pumps fail within a year or less. I personally know many engineers and workers working there and I'd say they are doing excellent jobs making good quality parts.

I worry that there are some other factors to be so such as foreign objects in the fuel tank, a failing fuel computer, a poorly working relay, clogged fuel line, clogged filter/strainer or fuel pressure control system. The fuel computer contains a high power resistor inside but it is a small resistance resistor. It is the tendency that the resistance increases as it is aged. If I were you, I'd check the resistance. Also the computer gets some heat from the resistor and it's performance becomes poorer as it is aged, I worry.

 

Morning Yamae, thanks for replying with your invaluable advice. To clarify, the Denso pump I bought was a used one and it actually did not spin up when I first checked it out before it was installed. It was only after a few external applications of 12 v to the terminals did it eventually start turning freely. So there's that.

Additionally, as you mentioned it, one of the other things that do worry me is the condition of the fuel tank. Can that really be a problem if there are no indications at all in the pump strainer? It is always perfectly clean. The fuel filter was also recently changed. I would really like your input to that question as cleaning the tank is quite a difficult exercise.

Thanks in advance.

 

The used pump not coming to life immediately should have been a hard pass. Hindsight being 20/20.....

The fuel filter you mention; I think there's one in the tank in addition to the strainer and external fuel filter. Not listed as maintenance items but it can't hurt to replace them all.

Can you actually see the bottom of the fuel tank to gauge cleanliness? There was a time when radiator shops were able to boil out fuel tanks. The risk here is that this can expose leaks on badly neglected tanks.

I wouldn't have any issues with installing a new Delphi pump.

 

Thanks for your reply Paulo. I just know about the strainer on the fuel pump itself and the big filter on the left rear of the chassis. That filter has been changed recently and the strainer on the pump is always perfectly clear so I wonder if the condition inside the tank can actually be a problem.

I really can't see very much inside it at all because it's a big container and intensely dark so I have no way of judging the condition at the bottom. I wouldn't care to mess with it unless it could be really and truly a factor in the pump failures.

I very much appreciate your advice on the Delphi pump but unfortunately it came just a little bit too late as I have already bought a new Bosch pump so I'll just hope for the best.

Thank you again for your reply.

 

I just looked at the parts diagram for the '92-'93 and there's only the external fuel filter, not like the later models which have one in the tank as well.

The Bosch pump should be fine too.