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Joes924Racer · Posted: Wed Jan 05, 2011 5:09 am Post subject: Control pressure.

Am I correct in my thinking in at a cold start - up with CSV if
my wur isnt getting power ill have a weak control pressure.

I dont have a aux. air valve I blocked it off.

I know the csv & thermo & wur are on the same circuit though
I need to check power source to wur and get some there.

Its just a pita to start cold without hitting the csv override
switch to get over the sputtering and popping coming back
out of the boot. I can pull the air meter and open the throttle
all day once its warm its ok dont think its afm guess i need to get
a afm guage before a boost guage.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Wed Jan 05, 2011 6:44 am Post subject:

Yea I have no power to the wur. Can I use a 931 wur or are the pressures diff.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Wed Jan 05, 2011 8:23 am Post subject:

When i run 12 volts to my wur .. does it
matter what side gets the hot wire and what
side gets the ground on the plug. Just askin
if anyone knows right off hand.

Somewhere in the past I've seen an article which I can't
find through searching which detailed pulling the WUR
apart, flipping the metal disc over and cleaning things up.

Is this it.

_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

KDJones2000 · Joined: 14 Sep 2010 Posts: 322 Location: Phoenix, AZ

It's just a heater element, so there is no polarity for it. One side hot, other side ground and you should be good to go.

Good luck, Keith
_________________
1987 924S SPEC car
Team Toofah Racing
1988 944 Turbo S

968rz · Joined: 21 Aug 2006 Posts: 537 Location: S. E. Wisconsin

Pull it apart and clean everything just be careful not to lose any parts, some are rather small.
I had a starting/running issue and when I took the WUR apart I found a small piston like part was gummed up and stuck. Of course it had to be the last piece inside to come out.
Cleaning that fixed a lot of running issues for me and only cost about an hours time and a can of carb cleaner.
_________________
Rick
79 924 coupe Petrol Blue 3spd auto (wife's DD)
93 968 coupe Amazon Green 4spd Tip (my DD)

Joes924Racer · Posted: Wed Jan 05, 2011 7:26 pm Post subject:

I will. Im hoping the diaphram is stuck somewhere in the normal
operating range not open like its sopposed to be when cold
or better yet its clogged. I know the 931 wur wont work
on the na. Im pretty sure I have an extra na wur
stashed away if all fails.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Thu Jan 06, 2011 8:41 am Post subject:

Took it all aprt easy enough,
just cleaning it up and regreasing the plunger pin.

_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Thu Jan 06, 2011 3:19 pm Post subject:

It was kind of trick to get it all back together. Though after installed
and car running, warmed up, timing checked, afm checked it runs ok.
with no flat spots

_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Fri Jan 07, 2011 2:47 am Post subject:

Anyone know how hard it is to get the screens out.
I didnt do it.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Fri Jan 07, 2011 4:17 am Post subject:

Heres a question : Once the disk is off, I see a rubber
diaphram of sorts ..inside of that is a disk with a dimple
in the middle its grease filled and holds the plunger. My
question can the inner dimpled disk plunger be removed ??
I cant seem to move it all. I certianly dont want to blow air
into the screened end. ........... In short Im
wonderin if the plunger is stuck. Also when i tighten down
the bi-metal strip the plunger kicks off to the side .... leaving me
to wonder more if the diapram is stuck, its spring loaded so
when i put the cover back on the plunger stays in the dimple
on the disk & all it just kick off to the side. Ill pull it and flip
the bi-metal strip & reinstall.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Fri Jan 07, 2011 12:24 pm Post subject:

I did it with out removing the fuel lines even, I wanted to see
if the disk thing moved under fuel pressure .. it didnt. Starts and idles & runs better it seems.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Fri Jan 07, 2011 4:44 pm Post subject:

Hey thanks for the pdf on wur rebuilding,Shawn.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Wed Feb 23, 2011 11:54 am Post subject:

Doesnt run to bad. I threw in a vid. Click on the 2nd picture
its a video.

[/b]
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Thu Feb 24, 2011 12:33 pm Post subject:

Click on the pic. its another video.

Its when its cold ... want to drain the gas tank a few times
into a gas can and strainer. Maybe find some water something
tells me I get to much of condensation thru the air meter.Its just that ill run whats in there down & go by the gas guage.

Dont think the AFM its to lean. Its a little cold blooded
on start up. Most times stumbles at a low idle. First thing
to do is get it set at a shop.

Anyone gonna give up the ghost on the correct percentage.

Its parts per million isnt it. Something like .08 or .13 or was it
.15
I cant be to lean as it dies with the CSV activaded, I want to
try another WUR too.

_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

dpw928 · Joined: 02 Nov 2002 Posts: 1860 Location: owasso, ok 74055