worf928

Gotta rest my old bones from time-to-time.

77tony

and your older fingers don't have bonesGreat work as always T

worf928

Tryin’ to keep the wear and tear even all’round.

polecat702

My intank pump was making noise, so I replaced it with a unit from Porsche. Installed it and it worked fine. I had to return to Texas, for Halliburton. My car sat for over a year. Came home and the fun started. It would just quit. Did all the relay swaps, had the MAF and LH rebuilt, all new regulators. Was ready to burn the car and collect the insurance. Jeff Spahn, came out to Vegas, and figured out the "NEW" intank pump had taken a dump. Fantastic friend, can't ever thank him enough, plus Stan, and Sean, for their help. That's a grand I spent for nothing. Porsche wouldn't take it back or replace it. So we ordered the screen and hose from Roger. I had also replaced the external pump, ck valve and filter. Car runs fantastic without it, and mine is supercharged with bigger injectors. From what I understand the intank pump was only added to a few years, and the majority of 928's never had them.

Live an learn.

olmann

Are you running the stock pump in your supercharged car or the higher capacity 044 pump?

worf928

Stock pump.

worf928

Now that is a "thing." An expensive thing too. I've got a couple of new in-tank pumps. I'll have to watch for this after install and test prior to install.

worf928

Actually, wait... I'm very curious. What test results led to the diagnosis of infant mortality of the in-tank pump? What was it doing? Was it seized? Shorted?

SeanR

I've had the same failure on Chucks GTS as Joe had in his. Newish in-tank pump fail after a couple of years. Seized right up blocking flow. He wanted new fuel dampers/regulator so we were doing that and then the car wouldn't start when we tested fuel pressure. Popped the in-tank out just to check the pumps and it was locked up. I think I still have it in a box around here. I can't remember what we did but if I did what I do now, I think I just replaced the pump with the strainer and put on an '87-88 pump and life was good. It's very rare that I replace the pump with new since they are so damned expensive now.

Just as a data point, my SC '88 runs the factory external with strainer also and no issues.

olmann

Cool. Not to take this thread down a different road but just curious as to the size injectors you’re running and the displacement of your supercharger? Thanks

Red Flash

Wait a minute. Let's clarify this. Is the suspicion here that the new run of intank pumps might have a quality issue?

Somewhere around 3 years ago the intank pump went NLA. I am assuming that Porsche had to make a new run of parts and thus the potential of quality issues now?

It was at this time I think that the price also went from something like USD 350 to USD 1'000? I happen to have a spare in stock from the old run of USD 350... TG!

Red Flash

And my goodness! Thanks for saying so. My mind has definitely reached the overflow in too many areas in my old age.

Maybe I have tired to memorize too many verb conjugations in too many languages (=wasted too much storage space) for anything more to stick anymore...

worf928

Ummm... I installed it in 2000 and .... eight. So, several Dog Decades ago. It's one of Dave Robert's (928 Specialists) Beta V2 Twin Screws. If I recall correctly, and I really should since I wrote the manual for it, but may not recall correctly, it's a 1.6l AutoRotor and running 24# injectors. I also did the 'chip' development for it with the SharkTuner I and later the II. Never had fueling issues. Plenty of fuel available.

Well... that just sucks. Except that would be good. So, in this case "that just doesn't suck" and it's A Bad Thing.

This is my recollection also. And now my assumption also. The new run of pumps that generated $1k pump prices resulted in pumps that don't suck (when they should.)

Thank God the pumps I have are the 'cheap' versions that *do* suck.

I'm fine functioning as your remote 928 knowledge archival storage site. I do think we should upgrade from single bit parity to a CRC checksum protocol though.

polecat702

It seized, Dave. Never blew the fuse, but fried a relay, and burned up the fuel pump circuit in the LH. Lou Ott, fixed my just rebuilt LH, for $60.00 which ain't bad considering. Jeff Spahn, traced everything out and also spoke with Lou, on the phone. We pulled the intank pump, Roger overnighted the parts, and it fired right up. I have the pump in my rollaway, as a souvenir, expensive trinket! Prolly only had 25 miles on it. I have no idea why it went south!

FWIW, Sean Ratts, and I have the exact same supercharger set up.

worf928

That’s exactly what I needed to know. Thank you Sir!