924Board.org

[B]

Hey everyone

I checked some numbers earlier and it seemed as though my '79 should have 2 fuel pumps. However when I looked underneath the tank I only see 2 hoses, one pump, one silencer and the one fuel accumulator and no extra wires or large nut piece with wires coming out.

Am I looking in the correct place or is this a hidden/tucked in a corner part?


perhaps I looked at the numbers wrong--

any help would be greatly appreciated

thanks
Sean
_________________
1979 924 n/a
BAE turbo
5-speed snailshell

[fiat22turbo]

My 79 only had one pump (external). I think some cars had an internal "lifter" pump, but eventually the cars moved to a single external pump as the pumps were replaced due to age.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

[B]

Thanks Stefan

Mine is starting to get noisy - - I was going to try to find one of those Pierburg pumps if I can -

Thanks again

Sean
_________________
1979 924 n/a
BAE turbo
5-speed snailshell

[Ozzie]

Early models had one pump and later models shifted to two.
IIRC the change was about '80 and there is confusion around this time during the changeover.
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

[ideola]

All 931s had the internal and external setup.

I have a more affordable Walbro option ($109) to the Bosch and Pierburg on my website. I've successfully used this on two 931s and a 924.
Click this link and scroll down to the bottom of the tune-up section.
http://garage.ideola.com/prod-Kits.html#tuneup
_________________
erstwhile owner of just about every 924 variant ever made

[B]

thanks everyone -

It has been confusing because the PET that I have - if I am reading it right shows #'s9249103158 -9249400051 with 2 pumps with the internal pump sitting inside of the bowl that hangs down. I could not see when I looked inside down from the sending unit either.

9249100001 - 9249103157 has one pump and visually looks like mine with no extra wires from the bottom of the tank.

if that makes any sense to anyone

Also - does one pump mean I have the additional filter inside the tank?



Dan that's a great price on the pump - do you know if it has the metal or plastic internals ? I think bosch has metal and pierburg had plastic - I do not know how much that matters in the end

Thanks again everyone
Sean B
_________________
1979 924 n/a
BAE turbo
5-speed snailshell

[ideola]

[B]

sounds great to me - pm sent with a couple other parts questions
_________________
1979 924 n/a
BAE turbo
5-speed snailshell

[dubrict]

My '79 has 2 fuel pumps. The external pump is about as easy to spot as a turkey in a chicken farm. But the untrained eye does have to search to find the internal one.

Are you having fuel delivery issues? If so, I can tell you right off that almost any porsche 924, 931, or 944 external fuel pump will work just fine and dandy
_________________
1979 924 NA
2009 Chevy Impala
2005 Dodge Dakota

[fiat22turbo]

Walbro is a supplier for many OEMs and are used as OEM replacements under license to various companies (much Fram or Purolator filters, Brembo brake rotors, etc.)
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)

[poorsha924]

Hi Sean
Hey your 79 most likely has to fuel pumps (both of mine have two)the one you can't find screws into the outlet of the fuel tank has two wires going to it the hose goes to the main fuel pump It is just a low pressure pump to push fuel to the main pump on start up & keep pressure against the main pump prevents air pockets when they all go bad If your 79 is starting & running fine I wouldn’t worry about it. Just leave it & it does have a filter (screen) on it & it is not replaceable without a new pump The thing you refer to as "the thing hanging down" is the fuel pressure accumulator this is a holding tank that holds extra fuel until you need more delivered to the fuel distributor & injectors
Steve
_________________
79 924S snailshell
audi big bore t-body
16" turbo wheels

[B]

Thanks -

I thought it would have 2 as well - however - when I checked the bottom of the tank where the PET shows the hose and wires should be - I have none.

I actually wondered if a previous owner may have removed it - I do not know why in the world you would do that (besides money). At some point I may consider adding one if need be.

The Walbro one that I bought from Dan looks great - It has all of the wire and hose connections nice and complete - and a really cool Ideola's garage sticker.

I will try to take a picture of the bottom of the tank area and post it - maybe I am looking right at it and not seeing it...

thanks very much

Sean
_________________
1979 924 n/a
BAE turbo
5-speed snailshell

[fiat22turbo]

Reading through the thread, it seems obvious why you don't have dual pumps.

Non-turbo's had one pump.

Factory Turbo's had two pumps.

You have a Non-turbo car (with an aftermarket turbo kit) So therefore you should have a single pump.

Having removed that inspection plate on my car, I can say that it is a huge pain in the butt since that will cause you to bath in fuel. I didn't notice any extra wires or a filter in the tank on my car.

Either way, just replace the single pump with a new Walbro and get on with it.
_________________
Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)