Aurel`s engine rebuild thread

[otto in norway]

Hey Aurel!
Greetings from norway. ...-Nice job!
I'm doing a rebuild myself, and this causes many sleepless nights... (As I'm sure you have discovered) ...So it is nice to see someone has been there, and knows what to do!
Hope you will get it fired up real soon..!

[Aurel]

Good luck Otto ! I did it in 6 months, really taking my time, and it was a very enjoyable experience. Post a thread here, with lots of pictures, and you will get all the help you may need. Some of the folks on this board are really very experienced, and we all love to share what we have learnt.

Best,

Aurel

[otto in norway]

Aurel:
I just came to think of something I read in the tech artichles here.
http://www.pelicanparts.com/techarticles/911_engine_rebuild/911_engine_rebuild1.htm ...(Scroll to the bottom)

He had a similar problem, and concludes it just takes time to get all the air out of the system, before the CIS can build up preassure to the injectors...

(But you say there is no action in the fuel pump, right?)

[Aurel]

Tonight, I removed the belly pan to access the fuel pump, and connected the battery directly to it. I heard something, but it was a buzzing sound coming from the fuse box, not the pump. This pump is gonna have to come out...

Aurel

[Charlie V]

Sounds like the pump is tired. I would try bench testing it before dropping the cash for a replacement.

A new pump will give you peace of mind when you are enjoying a drive a 1000 miles from home.

[Aurel]

Yes, tonight I am going to check that 12V goes to the pump when I lift the air sensor plate, and I will measure the current draw to the pump, and its internal resistance. Just made a cable for that .

Aurel

[sabeo.m]

Aurel is your fuel pump dead? Have you started your ride??

[Aurel]

Yup, fuel pump is definitely dead. It gets the voltage and does not spin. It was on its last leg before I started the rebuild. No big deal, just more delay...

Aurel

[otto in norway]

Funny how these things happen, huh?
It worked when you started the rebuild, and when your'e finished, it quits on you..!?
-Murphy's law...

[efhughes3]

Originally Posted by otto in norway

Funny how these things happen, huh?
It worked when you started the rebuild, and when your'e finished, it quits on you..!?
-Murphy's law...

That and sitting stagnant for a few months. It's like my high pressure fuel line: fine when I tore it down for my build last year. I even had a buddy ask me if I was going to replace it. I said "no, it's fine". Buzzzzzz: wrong answer....three leaks upon my first attempt at starting.

[g_vaxed]

I have a fuel pump from a 3.2 that
hasn't been used in years. Not sure if they interchange...?
If you want it, you are more than welcomed to it.
I'm usually down in that area once a week.

- Great thread.!. -

[Aurel]

Originally Posted by g_vaxed

I have a fuel pump from a 3.2 that
hasn't been used in years. Not sure if they interchange...?
If you want it, you are more than welcomed to it.
I'm usually down in that area once a week.

- Great thread.!. -

Thanks, I appreciate the offer, but I`ll get a new one for peace of mind. A $146 Walbro is a direct replacement, not as costly as a Bosch.

Aurel

[Aurel]

While waiting for my new fuel pump to arrive, I repainted by bumpers with a special flexible paint for plastics. It looks a lot better now, and if this paint holds up well, I can renew all my weathered black rubber pieces like that....

Aurel

[felixcontour]

great thread! i was just helping a friend out sorting his CIS and pump issues, we had a similar problem - the pump was spinning, but no fuel output though we had gas and all the lines were clear. he's using a walbro too. problem? wired backwards, pumping the wrong way. funny how simple things can cause large headaches, eh?

keep us posted, of course

[TibetanT]

Originally Posted by felixcontour

great thread! i was just helping a friend out sorting his CIS and pump issues, we had a similar problem - the pump was spinning, but no fuel output though we had gas and all the lines were clear. he's using a walbro too. problem? wired backwards, pumping the wrong way. funny how simple things can cause large headaches, eh?

keep us posted, of course

You know what? It's always something fundamental, huh?

[EarlySport]

I have been told that these pumps often sieze up when they are left dry ( ie. did you drain the tank ? ). Apparently the idea is to keep them wet with fuel or similar.

I've had two fail when the tank was drained. One the period of time was many years, the other only a month. The latest one I connected power in reverse and it freed up, and then worked in the normal direction. You could feel the pump give a little kick when power was applied when it was siezed.

[Aurel]

The power in reverse is a great idea, should have tried that before ordering a new one! Oh well, at 110,000 miles it was getting tired regardless.

Aurel

[felixcontour]

Originally Posted by Aurel

The power in reverse is a great idea, should have tried that before ordering a new one! Oh well, at 110,000 miles it was getting tired regardless.

Aurel

I'm definitely getting the impression that having a spare around is a good idea. You could always bench-test it to see if it works, and just keep it in the trunk in case the new one conks out.

Loving the thread - keep up the good work.

[Aurel]

New pump is here, weather is cooperating (outside is better for gas fumes). I`ll be doing the surgery later today...any last minute advice?





Aurel

[Aurel]

Allright, the pump replacement went fine. I now have gas spraying through my injectors. I also have spark. But when I crank, nothing happens. Not a sputter, nothing. The part that worries me is that when I crank with the fuel pump relay removed, I hear a few pops through the pop-off valve??
Could my static ignition timing be so far off? Can I set it to 5deg past tdc with the timing light while someone cranking the engine with no fuel?. Or, can I try to move the distributor while someone is cranking with fuel to try to get it to start...? I cannot imagine my cam timing would be wrong, but maybe I have the distributor off by 180 deg?

Aurel