F18Rep

There may be a lot of reasons not to do this but I just can't throw a 2 year old pump in the trash without some tinkering...

"Uncrimping" the housing was a lot easier than I expected, just a screwdriver and a little leverage. That took about 2 minutes but is the hardest part of doing this. Sorry no pics of that.

Pull the head straight out.








If it doesn't seem to fit back together right, just use a small rod to push through the tank-end fitting and push the whole assembly back out of the housing. The pump's seal must be in place correctly to get good pressure.

Bruce

mytrplseven

You sound like me. I completely disassembled the fuse box, all 5 layers of it. Can't believe I actually got it back together. Did you ever find out what caused the brushes to "gum up"?

J Berk

nice write-up !!

admiralkhole

I'm going to give this a shot today, thanks!

gregeast

Since stuff like this tends to have a common failure mode I wouldn't be surprised if you get a visit from angry fuel pump manufacturers. Well done!

F18Rep

The only thing I can figure on the gumming up of the brushes is bc the car sat over the winter - the tank was empty enough to not have fuel pressure though.

The most surprising thing to me was that every part of the pump is immersed in gas. So, I know that sparks from the armature can't ignite gas if there are no fumes but what about when you run out of gas - seems like an accident waiting to happen - maybe I missed something in science classes.

PS... I didn't take apart the pump section - lots of tiny springs and parts. Assembled pump tests good now though - so far, just waiting for the new strainer to get here from Paragon. I have another old pump to try this on - we'll see....;] Bruce

admiralkhole

I just got mine apart....want to see what a seized pump looks like?







It's no wonder why it wouldn't spin up.

Anyways, I got it all cleaned up and spinning freely, all the crap and gunk out of it and seems to work fine now. I'm still going to get a new pump though, no telling how long this one will last. I found some brand new ones on ebay for 50...does anyone know how many lph or gph the stock pump flows? I might spend a little more and go for a Walbro but if the stock pump can keep up with my moderately modded v8, I'll just get another.

THANKS FOR THE HELP F18!

Gawernator

Isn't it so cool to take things apart and put them back together (except when you're done and you have parts leftover)

955GT

The 944 FSM states that fuel flow is 850 cc in 30 seconds (for 2.5 liter engine).
You can run fuel pump by bridging terminals 30 and 87b in the DME relay socket.
Test in typically done by connecting a hose from the fuel rail test port to a calibrated container.
Hope this helps.

CyCloNe!

Very nice write up! Subscribed

John_AZ

Very good write up F18Rep!

I have a couple of fuel pumps on the shelf and always wanted to attempt a repair.
I could not find a supplier for the "O" ring. Some posts say it is nothing special.
One of my pumps has a leak and the fix should be somewhat simple depending on the crimp method used to reseal the pump.

J_AZ