I was getting ready to change out my fuel pump sock as service item. Didn't look like a terrible job and it was an excuse to just inspect the tank and wiring. I've never had a need to do anything back there and AFAIK, nothing has ever been replaced or serviced. This got me to wondering if replacing the original pump with a new sock might be just as appropriate. Do they just fail or can they get weak with age? Or am I just fixing something that isn't broken. My fuel system is stock, no other issues. Duty cycle seems normal but I have no way to check fuel pressure. Pumps aren't exactly cheap but not stupidly pricey either. What do the smart guys think?

 

Wouldn't be a bad idea as the pump is most likely 25+ years old now. I'd do a supra twin turbo pump for a stock fuel system car.

 

Thanks. And yeah, almost positive it's the original pump. But why the Supra pump?

 

And can the Supra pump be used with the original wiring for a stock fuel system car? I thought the current draw of the Supra was higher than other pumps. Or is that just the case when the fuel system is upgraded for higher than stock fueling rates causing the pump to move more fuel (and draw more current)?

I am keenly interested in this, my car also has a stock pump and wiring.

 

I would replace it just for peace of mind, with new sock and hanger O-ring.

 

You can send your stock pump out for servicing e.g. to RC Eng.
Interesting to learn the state of a ~25 years old pump. Probably I'll service mine too this summer.

 

Jim,


I know what you mean, I've been thinking about putting in the Supra pump I bought oh...about 10 years ago now...but then I'm kind of like, "Meh...it works so...why tempt Fate?"

 

Thanks guys. So confirming that changing the pump instead of just the sock at this point might be wise maintenance. But why the Supra pump? I mean the stock FD (Denso?) pump has served well in my car all these years. I don't run high boost and mods are mostly just bolt-ons. And is the Supra pump a PnP type swap? Any re-wiring needed?

 

The Supra pump is an exact fit replacement for the stock pump. I replaced my stock pump with a Supra pump in 04, and have had no issues with it.

 

Thanks for the tip gentleman. Did a little searching and reading too. I'll be ordering a new Mark IV Supra pump and kit.