924Board.org

jopather · Joined: 16 Jun 2005 Posts: 58 Location: California

Hey everyone... It's been a while.

My 924's been running great, and I've put about 5000 miles on it since getting it rebuilt. Today I went out for a drive to get some new spark plugs, and made the mistake of turning down my stereo.

Darn.

I heard this funning whining noise, so I put it in neutral and got out. It's definitely coming from the rear passenger side, in the general area of my fuel pump. I can't pinpoint it to make sure it's my fuel pump though, and I don't want to drop $250 on a pump if I don't need it. Any ideas? Fuel delivery seems to be doing fine, and the pump was brand new when I got the car going...

One other question - when I take my engine up above about 3800-4000 RPM, even for just a brief little bit, I get the smell of burning oil. Is that normal, just blow-by?

Thanks, as always!
_________________
1978 924
My car - a hole in my driveway where all my paychecks go...

Smoothie · Posted: Mon Apr 02, 2007 8:36 am Post subject:

You couldn't leave well-enough alone, right? You had the fix in place for the noisey fuel pump but had to undo it.

Noisey fuel pumps on the 924 are normal - especially the OE Bosch main pump. Noise alone isn't enough to diagnose a problem with them. -Even the noise getting louder isn't necessarilly enough. A more definite sign is when the pump sound changes from steady to changing pitch as if it's speeding up and slowing down - this will probably be accompanied by some crappei running and if you have a CIS tester, will show as fluctuating fuel pressures. -So, if the noise is steady+loud, don't worry.

The oil smell could be from a leaky breather hose or oil dripping on and burning off a hot part of the engine. Check for deteriorated breather line/s.
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

jopather · Joined: 16 Jun 2005 Posts: 58 Location: California

Alright.. so I read in your post, "Turn the damn radio back up". Great, will do.

I love cheap fixes.

I'll look around for leaks. I did replace the original seal around my dip stick with something that kind of fit (couldn't find a real one), but that might be leaking a little...

Thanks Smoothie.
_________________
1978 924
My car - a hole in my driveway where all my paychecks go...

jopather · Joined: 16 Jun 2005 Posts: 58 Location: California

Well, went to go turn my radio back up and fix the fuel pump, and....the fuel pump doesn't make any noise anymore anyways, so there we go.

_________________
1978 924
My car - a hole in my driveway where all my paychecks go...

Nobbi · Joined: 24 Aug 2006 Posts: 1396 Location: Germany

Hey,

since last weekend my car is back on the road and the fuel pump made its usal noise when turning ignition on. That `s the way it goes since around 10 years.... yesterday i turned the key and ...... no noise !!
I thought, dammed, fuel pump died.But it fired right up, no problems!!???
Kind of strange...

Nobby

!tom · Posted: Tue Apr 03, 2007 3:02 am Post subject:

Check your fuel pump realy before you condemn your fuel pump!
_________________
78 924 NA
5-lug

blargonator · Joined: 22 Sep 2004 Posts: 100 Location: kalamazoo MI

my old autobody teacher told me a rabbit fuelpump can be used if you swap the fittings, of course he told me this after i spent 250 on my fuel pump and had no reason to investigate this anymore.

jopather · Joined: 16 Jun 2005 Posts: 58 Location: California

I never really thought of looking in to other fuel pumps, but it makes sense that any in-line fuel pump like that would work as long as it's close to the same specs. I'll look into that if mine ends up dying.

As to the relay - I've had to replace that once already, but when that goes the fuel pump doesn't make noise at all...
_________________
1978 924
My car - a hole in my driveway where all my paychecks go...